Today’s evolving fireground demands greater insights and an increased understanding of buildings, occupancy risk profiling (ORP) and building anatomy. Recently there has been a movement that has categorized buildings into two groups: engineered and legacy construction.
I strongly believe this is far too limiting and restrictive which is resulting in missed opportunities to develop further insights into other building systems and occupancy risk profiling. In order to refine categories that provide corresponding values related to inherent construction features, systems, collapse and comprise, performance characteristics, fire integrity, resistance etc., the following building anatomy categories are suggested and promoted:
Building Anatomy
Construction Systems
Heritage
Pre-1900
Legacy
1900-1949
Conventional
1950-1979
Engineered
1980-2001
Integrated Hybrid Systems
2002- current …
Composite Engineered Systems
2010 – current …
Give some thought to the time spans and the types of buildings at would compromise each group. I’ll post an upcoming article with expanded narrative on each…..
In response to numerous requests from our recent posting; Commercials- Got Fire? Anticipate Collapse briefing post (HERE). We have developed and produced a comprehensive download in PDF format of the entire article that can be used for training, distribution and discussions.
Click on the image above and download the PDF file and use accordingly or download HERE
There are numerous factors to be cognizant of in operations involving commercial buildings and occupancies; with special considerations and a diligent focus on a wide degree of facets on the fireground during combat fire engagement.
You need to start somewhere, thus the investment in these observations and insights for this event. Open your eyes on the fireground, there is so much to take in and respond to; if you know what to look for and can process what you’re seeing.
It is mission critical to comprehend and understand your department’s operational capabilities and the necessary deployment demands for fire suppression, fire flow and phased operations at commercial building fires.
Commercial Fire and Collapse
Respect these buildings for the occupancy risk they present and not the typical occupancy type that we develop our conventional strategies, incident action plans and tactical deployments.
It’s a lot more than that, with far greater consequences; that may be very unforgiving.
An image from a NIST computer model shows temperature levels during the 2007 Charleston Sofa Super Store fire. Dark blue is ambient temperature; bright red is about 800 degrees C (1500 degrees F). Credit: NIST
Fire Modeling Software
These fire simulation programs were developed or sponsored by the Fire Research Division at the NIST. The list of programs is divided into two broad categories below: currently-supported software and archival (unsupported) software. In order to get further information or to obtain one of the programs, click on the appropriate name.
Current Software
These models are being actively developed and supported by the laboratory. Details of the software, including download, development, and support information are included on the individual web pages for each model.
FDS (Fire Dynamics Simulator) is a computational fluid dynamics (CFD) model of fire-driven fluid flow. The software solves numerically a form of the Navier-Stokes equations appropriate for low-speed, thermally-driven flow, with an emphasis on smoke and heat transport from fires.
These models are included largely for reference or historical interest and span several decades of development of computational tools in fire research at NIST. As such, they are largely unsupported due to the age of the software.
ALOFT-FTTM (A Large Outdoor Fire plume Trajectory model – Flat Terrain) is a computer based model to predict the downwind distribution of smoke particulate and combustion products from large outdoor fires. It solves the fundamental fluid dynamic equations for the smoke plume and its surroundings with flat terrain. The program contains a graphical user interface for input and output and a user modifiable database of fuel and smoke emission parameters. The output can be displayed as downwind, crosswind and vertical smoke concentration contours. Information on using the program is available with on-line help commands in the program.
ASCOS (Analysis of Smoke Control Systems) is a program for steady air flow analysis of smoke control systems. This program can analyze any smoke control system that produces pressure differences with the intent of limiting smoke movement in building fire situations. The program is also capable of modeling the stack effect created in taller buildings during extreme temperature conditions. The program input consists of the outside and building temperatures, a description of the building flow network and the flows produced by the ventilation or smoke control system. The output consists of the steady state pressures and flows throughout the building. Another newer program, CONTAM, may be more appropriate to some applications than ASCOS.
ASET-B (Available Safe Egress Time – BASIC) is a program for calculating the temperature and position of the hot smoke layer in a single room with closed doors and windows. ASET-B is a compact easy to run program which solves the same equations as ASET. The required program inputs are a heat loss fraction, the height of the fire, the room ceiling height, the room floor area, the maximum time for the simulation, and the rate of heat release of the fire. The program outputs are the temperature and thickness of the hot smoke layer as a function of time.
ASMET (Atria Smoke Management Engineering Tools) consists of a set of equations and a zone fire model for analysis of smoke management systems for large spaces such as atria, shopping malls, arcades, sports arenas, exhibition halls and airplane hangers. ASMET is written in C++ language. For program documentation and a description of the input data, the user should refer to NISTIR 5516, Klote, J. H., Method of Predicting Smoke Movement in Atria with Application to Smoke Management, NIST.
BREAK1 (Berkeley Algorithm for Breaking Window Glass in a Compartment Fire) is a program which calculates the temperature history of a glass window exposed to user described fire conditions. The calculations are stopped when the glass breaks. The inputs required are the glass thermal conductivity, thermal diffusivity, absorption length, breaking stress, Young’s modulus, thermal coefficient of linear expansion, thickness, emissivity, shading thickness, half-width of window, the ambient temperature, numerical parameters and the time histories of flame radiation from the fire, hot layer temperature and emissivity, and heat transfer coefficients. The outputs are temperature history of the glass normal to the glass surface, and the window breakage time.
CCFM (Consolidated Compartment Fire Model version VENTS) is a two-layer zone-type compartment fire model computer code. It simulates conditions due to user-specified fires in a multi-room, multi-level facility. The required inputs are a description of room geometry and vent characteristics (up to 9 rooms, 20 vents), initial state of the inside and outside environment, and fire energy release rates as a functions of time (up to 20 fires). If simulation of concentrations of products of combustion is desired, then product release rates must also be specified (up to three products). Vents can be simple openings between adjacent spaces (natural vents) or fan/duct forced ventilation systems between arbitrary pairs of spaces (forced vents). For forced vents, flow rates and direction can be user-specified or included in the simulation by accounting for user-specified fan and duct characteristics. Wind and stack effects can be taken into account. The program outputs for each room are pressure at the floor, layer interface height, upper/lower layer temperature and (optionally) product concentrations.
DETACT-QS and DETACT-T2
DETACT-QS (DETector ACTuation – Quasi Steady) is a program for calculating the actuation time of thermal devices below unconfined ceilings. It can be used to predict the actuation time of fixed temperature heat detectors and sprinkler heads subject to a user specified fire. DETACT-QS assumes that the thermal device is located in a relatively large area, that is only the fire ceiling flow heats the device and there is no heating from the accumulated hot gases in the room. The required program inputs are the height of the ceiling above the fuel, the distance of the thermal device from the axis of the fire, the actuation temperature of the thermal device, the response time index (RTI) for the device, and the rate of heat release of the fire. The program outputs are the ceiling gas temperature and the device temperature both as a function of time and the time required for device actuation. DETACT-T2 (DETector ACTuation – Time squared) is a program for calculating the actuation time of thermal devices below unconfined ceilings. It can be used to predict the actuation time of fixed temperature and rate of rise heat detectors, and sprinkler heads subject to a user specified fire which grows as the square of time. CT-T2 assumes that the thermal device is located in a relatively large area, that is only the fire ceiling flow heats the device and there is no heating from the accumulated hot gases in the room. The required program inputs are the ambient temperature, the response time index (RTI) for the device, the activation and rate of rise temperatures of the device, height of the ceiling above the fuel, the device spacing and the fire growth rate. The program outputs are the time to device activation and the heat release rate at activation.
ELVAC (Elevator Evacuation) is an interactive computer program that estimates the time required to evacuate people from a building with the use of elevators and stairs. It is cautioned that elevators generally are not intended as a means of fire evacuation, and they should not be used during fires. However, it is possible to design elevator systems that for fire emergencies, and ELVAC can be used to evaluate the potential performance of such systems. ELVAC calculates the evacuation time for one group of elevators. If a building has more than one group of elevators, ELVAC can be run on each group separately. Input consists of floor to floor heights, number of people on floors, number of elevators in the group, elevator speed, elevator acceleration, elevator capacity, elevator door type and width, and various inefficiency factors. The output is a table of elevator travel time, round trip time, people moved, and number of round trips for each floor plus the total evacuation time.
FIRDEMND simulates the suppression of post flashover charring and non-charring solid-fuel fires in compartments using water sprays from portable hose-nozzle equipment used by the fire departments. The output of the Fire Demand Model (FDM) shows the extinguishing effects of water spray at various flow rates and droplet sizes. The calculations are based on a heat and mass balance accounting for gas and surface cooling, steam-induced smothering, water-spray induced air entrainment, direct extinguishment of the fire by water and the energy transport via inflow and outflow of heat and products of combustion.
FIRST (FIRe Simulation Technique) is the direct descendant of the HARVARD V program developed by Howard Emmons and Henri Mitler. The fire may be entered either as a user-specified time-dependent mass loss rate or in terms of fundamental properties of the fuel. In the latter case, the program will predict the fire growth rate by considering the changing oxygen concentration and smoke layer conditions in the room of fire origin. It can also predict the heating and possible ignition of up to three targets. The original fire and targets may also be user specified fires. The required program inputs are the geometrical data describing the rooms and openings, and the thermophysical properties of the ceiling, walls, burning fuel, and targets. The generation rate of soot must be specified, and the generation rates of other species may be specified as a yield of the pyrolysis rate. Among the program outputs are the temperature and thickness of, and species concentrations in, the hot upper layer and also in the cooler, lower layer in each compartment. Also given are wall surface temperatures, heat transfer rates and mass flow rates. MASBANK is used to create and maintain a data base of materials and their fire properties for use by the FIRST program. MASBANK can accommodate 20 properties for up to 50 materials. The program has the capability to add, delete, change, alphabetize and view the material properties in the data bank. Material properties from MASBANK may be transferred directly into the FIRST program.
Jet is a model for the prediction of detector activation and gas temperature in the presence of a smoke layer.
FPETool (Software and Documentation) is a set of engineering equations useful in estimating potential fire hazard and the response of the space and fire protection systems to the developing hazard. Version 3.2 incorporates an estimate of smoke conditions developing within a room receiving steady-state smoke leakage from an adjacent space. Estimates of human viability resulting from exposure to developing conditions within the room are calculated based upon the smoke temperature and toxicity.
LAVENT is a program developed to simulate the environment and the response of sprinkler links in compartment fires with draft curtains and fusible link operated ceiling vents. The model, used to calculate the heating of the fusible links, includes the effects of the ceiling jet and the upper layer of hot gases beneath the ceiling. The required program inputs are the geometrical data describing the compartment, the thermophysical properties of the ceiling, the fire elevation, the time dependent energy release rate of the fire, the fire diameter or energy release rate per area of the fire, the ceiling vent area, the fusible link response-time-index (RTI) and fuse temperature, the fusible link positions along the ceiling, the link assignment to each ceiling vent, and the ambient temperature. A maximum of five ceiling vents and ten fusible links are permitted in the compartment. The program outputs are the temperature, mass and height of the hot upper layer, the temperature of each link, the ceiling jet temperature and velocity at each link, the radial temperature distribution along the interior surface of the ceiling, the radial distribution of the heat flux to the interior and exterior surfaces of the ceiling, the fuse time of each link, and the vent area that has been opened.GRAPH is a graphics program which runs in conjunction with LAVENT. The results for LAVENT are sent to the data file, GRAPH.OUT, after each prescribed time step. GRAPH then allows the user to choose two sets of variables to be plotted on the screen and has the additional capability of hardcopy output.
These fire simulation programs were developed or sponsored by the Building and Fire Research Laboratory. In order to get further information or to obtain one of the programs, click on the appropriate name.
ALOFT-FTTM- A Large Outdoor Fire plume Trajectory model – Flat Terrain
FASTLite- A collection of procedures which builds on the core routines of FIREFORM and the computer model CFAST to provide engineering calculations of various fire phenomena,
FPETool- Fire Protection Engineering Tools (equations and fire simulation scenarios)
Jet- A Model for the Prediction of Detector Activation and Gas Temperature in the Presence of a Smoke Layer
LAVENT- Response of sprinkler links in compartment fires with curtains and ceiling vents
NIST Fire Dynamics Simulator and Smokeview – The NIST Fire Dynamics Simulator predicts smoke and/or air flow movement caused by fire, wind, ventilation systems etc. Smokeview visualizes the predictions generated by NIST FDS.
Using Fire Models to Understand Fire BehaviorNIST’s fire modeling capabilities can help firefighters understand and predict fire conditions, HERE
Fire Dynamics is the study of how chemistry, fire science, material science and the mechanical engineering disciplines of fluid mechanics and heat transfer interact to influence fire behavior.
In other words, Fire Dynamics is the study of how fires start, spread and develop. But what exactly is a fire?
Defining Fire
Fire can be described in many ways – here are a few:
NFPA 921: ”A rapid oxidation process, which is a chemical reaction resulting in the evolution of light and heat in varying intensities.”
Webster’s Dictionary: “A fire is an exothermic chemical reaction that emits heat and light”
Fire can also be explained in terms of the Fire Tetrahedron – a geometric representation of what is required for fire to exist, namely, fuel, an oxidizing agent, heat, and an uninhibited chemical reaction.
Measuring Fire
Heat Energy is a form of energy characterized by vibration of molecules and capable of initiating and supporting chemical changes and changes of state (NFPA 921).
In other words, it is the energy needed to change the temperature of an object – add heat, temperature increases; remove heat, temperature decreases.
Heat energy is measured in units of Joules (J), however it can also be measured in Calories (1 Calorie = 4.184 J) and BTU’s (1 BTU = 1055 J).
Temperature is a measure of the degree of molecular activity of a material compared to a reference point.
Temperature is measured in degrees Farenheit (melting point of ice = 32 º F, boiling point of water = 212 º F) or degrees Celsius (melting point of ice = 0 º C, boiling point of water = 100 º C).
º C
º F
Response
37
98.6
Normal human oral/body temperature
44
111
Human skin begins to feel pain
48
118
Human skin receives a first degree burn injury
55
131
Human skin receives a second degree burn injury
62
140
A phase where burned human tissue becomes numb
72
162
Human skin is instantly destroyed
100
212
Water boils and produces steam
140
284
Glass transition temperature of polycarbonate
230
446
Melting temperature of polycarbonate
250
482
Charring of natural cotton begins
>300
>572
Charring of modern protective clothing fabrics begins
>600
>1112
Temperatures inside a post-flashover room fire
Heat Release Rate (HRR) is the rate at which fire releases energy – this is also known as power. HRR is measured in units of Watts (W), which is an International System unit equal to one Joule per second.
Depending on the size of the fire, HRR is also measured in Kilowatts (equal to 1,000 Watts) or Megawatts (equal 1,000,000 Watts).
Heat Flux is the rate of heat energy transferred per surface unit area – kW/m2.
Heat Flux (kW/m2)
Example
1
Sunny day
2.5
Typical firefighter exposure
3-5
Pain to skin within seconds
20
Threshold flux to floor at flashover
84
Thermal Protective Performance Test (NFPA 1971)
60 – 200
Flames over surface
Temperature vs. Heat Release Rate
One candle vs. ten candles – same flame temperature but 10 times the heat release rate!
HRR: ~ 80 W Temperature: 500 C - 1400 C
(930 F - 2500 F)
HRR: ~ 800 W
Heat Transfer
Heat transfer is a major factor in the ignition, growth, spread, decay and extinction of a fire.
It is important to note that heat is always transferred from the hotter object to the cooler object - heat energy transferred to and object increases the object’s temperature, and heat energy transferred from and object decreases the object’s temperature.
CONDUCTION
Conduction is heat transfer within solids or between contacting solids.
The governing equation for heat transfer by conduction is:
Where T is temperature (in Kelvin), A is the exposure area (meters squared), L is the depth of the solid (meters), and k is a constant that unique for different materials know as the thermal conductivity and has units of (Watts/meters*Kelvin).
Thermal Conductivity of Common Materials
Copper = 387
Gypsum = 0.48
Steel = 45.8
Oak = 0.17
Glass = 0.76
Pine = 0.14
Brick = 0.69
PPE = 0.034 – 0.136
Water = 0.58
Air = 0.026
CONVECTION
Convection is heat transfer by the movement of liquids or gasses.
The governing equation for heat transfer by convection is:
Where T is temperature (in Kelvin), A is the area of exposure (in meters squared), and h is a constant that is unique for different materials known as the convective heat transfer coefficient, with units of W/m2*K.
These values are found empirically, or, by experiment.
For free convection, values usually range between 5 and 25. But for forced convection, values can range anywhere from 10 to 500.
RADIATION
Radiation is heat transfer by electromagnetic waves.
The governing equation for heat transfer by radiation is:
Where T is temperature (in Kelvin), A is the area of exposure (in meters squared), α is the thermal diffusivity (a measure of how quickly a material will adjust it’s temperature to the surroundings, in meters squared per second) and ε is the emissivity (a measure of the ability of a materials surface to emit energy by radiation).
Fire Phenomena
Fire Development is a function of many factors including: fuel properties, fuel quantity, ventilation (natural or mechanical), compartment geometry (volume and ceiling height), location of fire, and ambient conditions (temperature, wind, etc).
Traditional Fire Development The Traditional Fire Development curve shows the time history of a fuel limited fire. In other words, the fire growth is not limited by a lack of oxygen. As more fuel becomes involved in the fire, the energy level continues to increase until all of the fuel available is burning (fully developed).
Then as the fuel is burned away, the energy level begins to decay.
The key is that oxygen is available to mix with the heated gases (fuel) to enable the completion of the fire triangle and the generation of energy.
Fire Behavior in a Structure The Fire Behavior in a Structure curve demonstrates the time history of a ventilation limited fire. In this case the fire starts in a structure which has the doors and windows closed.Early in the fire growth stage there is adequate oxygen to mix with the heated gases, which results in flaming combustion. As the oxygen level within the structure is depleted, the fire decays, the heat release from the fire decreases and as a result the temperature decreases.
When a vent is opened, such as when the fire department enters a door, oxygen is introduced.
The oxygen mixes with the heated gases in the structure and the energy level begins to increase.
This change in ventilation can result in a rapid increase in fire growth potentially leading to a flashover (fully developed compartment fire) condition.
Flashover is the transition phase in the development of a contained fire in which surfaces exposed to the thermal radiation, from fire gases in excess of 600° C,
reach ignition temperature more or less simultaneously and fire spreads rapidly through the space.
This is the most dangerous stage of fire development.
Informational Source: The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce. (HERE)
Predictability of Performance: Its Occupancy Risk NOT Occupancy Type
Tactical Patience and the New Considerations of Ventilation on Fire Behavior in Legacy and Contemporary Residential Construction
UL Ventilation and Fire Behavior Full Scale Testing
Impact of Ventilation on Fire Behavior in Legacy and Contemporary Residential Construction
For many of you that have been following my writings and perspectives on building construction, firefighting, command risk management and operational excellence for firefighter safety have long recognized that I have been promoting and advocating the fact the fireground is changining, our stratgies and tactics demand change adn does the demand for increased knowledge within the areas of building construction, fire dynamics, while integrating the art and science of firefighting. The most recent release of the testing report from Underwriters Laboratories; Impact of Ventilation on Fire Behavior in Legacy and Contemporary Residential Construction and the accompaning emphirical data further validates assumptions and presmises that many of us shared based upon field obervations and first hand incident operations related to the dramatic changes being witnessed as a result of operational challenges in a wide varity of occupanies and building types.
This material is a must read for all emerging and practicing company and command officers ( for starters) to being grasping the magnitude and extent of quantifiable data that supports the premise that combat fire engagement and suppression operations and the rules of engagement are going to change and that change is fast approaching.
Considerations for Tactical Patience and Adaptive Fireground Management are continued themes I will expand upon in future postings….
Here’s the executive summary of the report and findings from UL. For an download of the entire UL Report, go HERE.
Under the United States Department of Homeland Security (DHS) Assistance to Firefighter Grant Program, Underwriters Laboratories examined fire service ventilation practices as well as the impact of changes in modern house geometries. There has been a steady change in the residential fire environment over the past several decades. These changes include larger homes, more open floor plans and volumes and increased synthetic fuel loads. This series of experiments examine this change in fire behavior and the impact on firefighter ventilation tactics. This fire research project developed the empirical data that is needed to quantify the fire behavior associated with these scenarios and result in immediately developing the necessary firefighting ventilation practices to reduce firefighter death and injury.
Two houses were constructed in the large fire facility of Underwriters Laboratories in Northbrook, IL. The first of two houses constructed was a one-story, 1200 ft2, 3 bedroom, 1 bathroom house with 8 total rooms. The second house was a two-story 3200 ft2, 4 bedroom, 2.5 bathroom house with 12 total rooms. The second house featured a modern open floor plan, two-story great room and open foyer. Fifteen experiments were conducted varying the ventilation locations and the number of ventilation openings. Ventilation scenarios included ventilating the front door only, opening the front door and a window near and remote from the seat of the fire, opening a window only and ventilating a higher opening in the two-story house. One scenario in each house was conducted in triplicate to examine repeatability.
The results of these experiments provide knowledge for the fire service for them to examine their thought processes, standard operating procedures and training content. Several tactical considerations were developed utilizing the data from the experiments to provide specific examples of changes that can be adopted based on a departments current strategies and tactics.
Under the United States Department of Homeland Security (DHS) Assistance to Firefighter Grant Program, Underwriters Laboratories examined fire service ventilation practices as well as the impact of changes in modern house geometries.
There has been a steady change in the residential fire environment over the past several decades. These changes include larger homes, more open floor plans and volumes and increased synthetic fuel loads. This series of experiments examine this change in fire behavior and the impact on firefighter ventilation tactics.
This fire research project developed the empirical data that is needed to quantify the fire behavior associated with these scenarios and result in immediately developing the necessary firefighting ventilation practices to reduce firefighter death and injury.
Two houses were constructed in the large fire facility of Underwriters Laboratories in Northbrook, IL.
The first of two houses constructed was a one-story, 1200 ft2, 3 bedroom, 1 bathroom house with 8 total rooms.
The second house was a two-story 3200 ft2, 4 bedroom, and 2.5 bathroom house with 12 total rooms.
The second house featured a modern open floor plan, two story great room and open foyer.
Fifteen experiments were conducted varying the ventilation locations and the number of ventilation openings. Ventilation scenarios included ventilating the front door only, opening the front door and a window near and remote from the seat of the fire, opening a window only and ventilating a higher opening in the two-story house.
One scenario in each house was conducted in triplicate to examine repeatability. The results of these experiments provide knowledge for the fire service for them to examine their thought processes, standard operating procedures and training content. Several tactical considerations were developed utilizing the data from the experiments to provide specific examples of changes that can be adopted based on a departments current strategies and tactics.
The tactical considerations addressed include:
Stages of fire development:The stages of fire development change when a fire becomes ventilation limited.
It is common with today’s fire environment to have a decay period prior to flashover which emphasizes the importance of ventilatio
Forcing the front door is ventilation: Forcing entry has to be thought of as ventilation as well.
While forcing entry is necessary to fight the fire it must also trigger the thought that air is being fed to the fire and the clock is ticking before either the fire gets extinguished or it grows until an untenable condition exists jeopardizing the safety of everyone in the structure.
No smoke showing:A common event during the experiments was that once the fire became ventilation limited the smoke being forced out of the gaps of the houses greatly diminished or stopped all together.
No some showing during size-up should increase awareness of the potential conditions inside.
Coordination:If you add air to the fire and don’t apply water in the appropriate time frame the fire gets larger and safety decreases.
Examining the times to untenability gives the best case scenario of how coordinated the attack needs to be.
Taking the average time for every experiment from the time of ventilation to the time of the onset of firefighter untenability conditions yields 100 seconds for the one-story house and 200 seconds for the two-story house
In many of the experiments from the onset of firefighter untenability until flashover was less than 10 seconds.
These times should be treated as being very conservative. If a vent location already exists because the homeowner left a window or door open then the fire is going to respond faster to additional ventilation opening because the temperatures in the house are going to be higher.
Coordination of fire attack crew is essential for a positive outcome in today’s fire environment.
Smoke tunneling and rapid air movement through the front door:Once the front door is opened attention should be given to the flow through the front door.
A rapid in rush of air or a tunneling effect could indicate a ventilation limited fire.
Vent Enter Search (VES):During a VES operation, primary importance should be given to closing the door to the room.
This eliminates the impact of the open vent and increases tenability for potential occupants and firefighters while the smoke ventilates from the now isolated room.
Flow paths: Every new ventilation opening provides a new flow path to the fire and vice versa.
This could create very dangerous conditions when there is a ventilation limited fire.
Can you vent enough?:In the experiments where multiple ventilation locations were made it was not possible to create fuel limited fires.
The fire responded to all the additional air provided.
That means that even with a ventilation location open the fire is still ventilation limited and will respond just as fast or faster to any additional air.
It is more likely that the fire will respond faster because the already open ventilation location is allowing the fire to maintain a higher temperature than if everything was closed. In these cases rapid fire progression if highly probable and coordination of fire attack with ventilation is paramount.
Impact of shut door on occupant tenability and firefighter tenability:Conditions in every experiment for the closed bedroom remained tenable for temperature and oxygen concentration thresholds.
This means that the act of closing a door between the occupant and the fire or a firefighter and the fire can increase the chance of survivability.
During firefighter operations if a firefighter is searching ahead of a hoseline or becomes separated from his crew and conditions deteriorate then a good choice of actions would be to get in a room with a closed door until the fire is knocked down or escape out of the room’s window with more time provided by the closed door
Potential impact of open vent already on flashover time:All of these experiments were designed to examine the first ventilation actions by an arriving crew when there are no ventilation openings.
It is possible that the fire will fail a window prior to fire department arrival or that a door or window was left open by the occupant while exiting.
It is important to understand that an already open ventilation location is providing air to the fire, allowing it to sustain or grow.
Pushing fire:There were no temperature spikes in any of the rooms, especially the rooms adjacent to the fire room when water was applied from the outside. It appears that in most cases the fire was slowed down by the water application and that external water application had no negative impacts to occupant survivability.
While the fog stream “pushed” steam along the flow path there was no fire “pushed”.
No damage to surrounding rooms:Just as the fire triangle depicts, fire needs oxygen to burn.
A condition that existed in every experiment was that the fire (living room or family room) grew until oxygen was reduced below levels to sustain it.
This means that it decreased the oxygen in the entire house by lowering the oxygen in surrounding rooms and the more remote bedrooms until combustion was not possible.
In most cases surrounding rooms such as the dining room and kitchen had no fire in them even when the fire room was fully involved in flames and was ventilating out of the structure.
Online Training Program
In order to make the results of this study more user friendly for the fire service to examine, UL developed an online interactive training module that can be viewed by clicking here. The program includes a professionally narrated description of all of the experiments, their results and the tactical considerations. Experimental video is used and graphical data is explained in a way that brings science to the street level firefighter.
UL University On-Line CBT
Comparison of Modern and Legacy Home Furnishings
An experiment was conducted with two side by side living room fires. The purpose was to gain knowledge on the difference between modern and legacy furnishings. The rooms measured 12 ft by 12 ft, with an 8 ft ceiling and had an 8 ft wide by 7 ft tall opening on the front wall. Both rooms contained similar amounts of like furnishings.
The modern room was lined with a layer of ½ inch painted gypsum board and the floor was covered with carpet and padding.
The furnishings included a microfiber covered polyurethane foam filled sectional sofa, engineered wood coffee table, end table, television stand and book case.
The sofa had a polyester throw placed on its right side. The end table had a lamp with polyester shade on top of it and a wicker basket inside it.
The coffee table had six color magazines, a television remote and a synthetic plant on it.
The television stand had a color magazine and a 37 inch flat panel television.
The book case had two small plastic bins, two picture frames and two glass vases on it.
The right rear corner of the room had a plastic toy bin, a plastic toy tub and four stuffed toys.
The rear wall had polyester curtains hanging from a metal rod and the side walls had wood framed pictures hung on them.
The legacy room was lined with a layer of ½ inch painted cement board and the floor was covered with unfinished hardwood flooring.
The furnishings included a cotton covered, cotton batting filled sectional sofa, solid wood coffee table, two end tables, and television stand.
The sofa had a cotton throw placed on its right side.
Both end tables had a lamp with polyester shade on top of them.
The one on the left side of the sofa had two paperback books on it.
A wicker basket was located on the floor in front of the right side of the sofa at the floor level.
The coffee table had three hard-covered books, a television remote and a synthetic plant on it.
The television stand had a 27 inch tube television.
The right front corner of the room had a wood toy bin, and multiple wood toys.
The rear wall had cotton curtains hanging from a metal rod and the side walls had wood framed pictures hung on them.
Both rooms were ignited by placing a lit stick candle on the right side of the sofa. The fires were allowed to grow until flashover. The modern room transitioned to flashover in 3 minutes and 30 seconds and the legacy room at 29 minutes and 30 seconds.
UL Ventilation and Fire Behavior Full Scale Testing
Impact of Ventilation on Fire Behavior in Legacy and Contemporary Residential Construction
For many of you that have been following my writings and perspectives on building construction, firefighting, command risk management and operational excellence for firefighter safety have long recognized that I have been promoting and advocating the fact the fireground is changining, our stratgies and tactics demand change adn does the demand for increased knowledge within the areas of building construction, fire dynamics, while integrating the art and science of firefighting. The most recent release of the testing report from Underwriters Laboratories; Impact of Ventilation on Fire Behavior in Legacy and Contemporary Residential Construction and the accompaning emphirical data further validates assumptions and presmises that many of us shared based upon field obervations and first hand incident operations related to the dramatic changes being witnessed as a result of operational challenges in a wide varity of occupanies and building types. This material is a must read for all emerging and practicing company and command officers ( for starters) to being grasping the magnitude and extent of quantifiable data that supports the premise that combat fire engagement and suppression operations and the rules of engagement are going to change and that change is fast approaching. Considerations for Tactical Patience and Adaptive Fireground Management are continued themes I will expand upon in future postings….
Here’s the executive summary of the report and findings from UL. For an download of the entire UL Report, go HERE.
Under the United States Department of Homeland Security (DHS) Assistance to Firefighter Grant Program, Underwriters Laboratories examined fire service ventilation practices as well as the impact of changes in modern house geometries. There has been a steady change in the residential fire environment over the past several decades. These changes include larger homes, more open floor plans and volumes and increased synthetic fuel loads. This series of experiments examine this change in fire behavior and the impact on firefighter ventilation tactics. This fire research project developed the empirical data that is needed to quantify the fire behavior associated with these scenarios and result in immediately developing the necessary firefighting ventilation practices to reduce firefighter death and injury.
Two houses were constructed in the large fire facility of Underwriters Laboratories in Northbrook, IL. The first of two houses constructed was a one-story, 1200 ft2, 3 bedroom, 1 bathroom house with 8 total rooms. The second house was a two-story 3200 ft2, 4 bedroom, 2.5 bathroom house with 12 total rooms. The second house featured a modern open floor plan, two-story great room and open foyer. Fifteen experiments were conducted varying the ventilation locations and the number of ventilation openings. Ventilation scenarios included ventilating the front door only, opening the front door and a window near and remote from the seat of the fire, opening a window only and ventilating a higher opening in the two-story house. One scenario in each house was conducted in triplicate to examine repeatability.
The results of these experiments provide knowledge for the fire service for them to examine their thought processes, standard operating procedures and training content. Several tactical considerations were developed utilizing the data from the experiments to provide specific examples of changes that can be adopted based on a departments current strategies and tactics.
Under the United States Department of Homeland Security (DHS) Assistance to Firefighter Grant Program, Underwriters Laboratories examined fire service ventilation practices as well as the impact of changes in modern house geometries.
There has been a steady change in the residential fire environment over the past several decades. These changes include larger homes, more open floor plans and volumes and increased synthetic fuel loads. This series of experiments examine this change in fire behavior and the impact on firefighter ventilation tactics.
This fire research project developed the empirical data that is needed to quantify the fire behavior associated with these scenarios and result in immediately developing the necessary firefighting ventilation practices to reduce firefighter death and injury.
Two houses were constructed in the large fire facility of Underwriters Laboratories in Northbrook, IL.
The first of two houses constructed was a one-story, 1200 ft2, 3 bedroom, 1 bathroom house with 8 total rooms.
The second house was a two-story 3200 ft2, 4 bedroom, and 2.5 bathroom house with 12 total rooms.
The second house featured a modern open floor plan, two story great room and open foyer.
Fifteen experiments were conducted varying the ventilation locations and the number of ventilation openings. Ventilation scenarios included ventilating the front door only, opening the front door and a window near and remote from the seat of the fire, opening a window only and ventilating a higher opening in the two-story house.
One scenario in each house was conducted in triplicate to examine repeatability. The results of these experiments provide knowledge for the fire service for them to examine their thought processes, standard operating procedures and training content. Several tactical considerations were developed utilizing the data from the experiments to provide specific examples of changes that can be adopted based on a departments current strategies and tactics.
The tactical considerations addressed include:
Stages of fire development: The stages of fire development change when a fire becomes ventilation limited.
It is common with today’s fire environment to have a decay period prior to flashover which emphasizes the importance of ventilation.
Forcing the front door is ventilation:Forcing entry has to be thought of as ventilation as well.
While forcing entry is necessary to fight the fire it must also trigger the thought that air is being fed to the fire and the clock is ticking before either the fire gets extinguished or it grows until an untenable condition exists jeopardizing the safety of everyone in the structure.
No smoke showing: A common event during the experiments was that once the fire became ventilation limited the smoke being forced out of the gaps of the houses greatly diminished or stopped all together.
No some showing during size-up should increase awareness of the potential conditions inside.
Coordination: If you add air to the fire and don’t apply water in the appropriate time frame the fire gets larger and safety decreases.
Examining the times to untenability gives the best case scenario of how coordinated the attack needs to be.
Taking the average time for every experiment from the time of ventilation to the time of the onset of firefighter untenability conditions yields 100 seconds for the one-story house and 200 seconds for the two-story house
In many of the experiments from the onset of firefighter untenability until flashover was less than 10 seconds.
These times should be treated as being very conservative. If a vent location already exists because the homeowner left a window or door open then the fire is going to respond faster to additional ventilation opening because the temperatures in the house are going to be higher.
Coordination of fire attack crew is essential for a positive outcome in today’s fire environment.
Smoke tunneling and rapid air movement through the front door: Once the front door is opened attention should be given to the flow through the front door.
A rapid in rush of air or a tunneling effect could indicate a ventilation limited fire.
Vent Enter Search (VES): During a VES operation, primary importance should be given to closing the door to the room.
This eliminates the impact of the open vent and increases tenability for potential occupants and firefighters while the smoke ventilates from the now isolated room.
Flow paths:Every new ventilation opening provides a new flow path to the fire and vice versa.
This could create very dangerous conditions when there is a ventilation limited fire.
Can you vent enough?: In the experiments where multiple ventilation locations were made it was not possible to create fuel limited fires.
The fire responded to all the additional air provided.
That means that even with a ventilation location open the fire is still ventilation limited and will respond just as fast or faster to any additional air.
It is more likely that the fire will respond faster because the already open ventilation location is allowing the fire to maintain a higher temperature than if everything was closed. In these cases rapid fire progression if highly probable and coordination of fire attack with ventilation is paramount.
Impact of shut door on occupant tenability and firefighter tenability: Conditions in every experiment for the closed bedroom remained tenable for temperature and oxygen concentration thresholds.
This means that the act of closing a door between the occupant and the fire or a firefighter and the fire can increase the chance of survivability.
During firefighter operations if a firefighter is searching ahead of a hoseline or becomes separated from his crew and conditions deteriorate then a good choice of actions would be to get in a room with a closed door until the fire is knocked down or escape out of the room’s window with more time provided by the closed door
Potential impact of open vent already on flashover time: All of these experiments were designed to examine the first ventilation actions by an arriving crew when there are no ventilation openings.
It is possible that the fire will fail a window prior to fire department arrival or that a door or window was left open by the occupant while exiting.
It is important to understand that an already open ventilation location is providing air to the fire, allowing it to sustain or grow.
Pushing fire: There were no temperature spikes in any of the rooms, especially the rooms adjacent to the fire room when water was applied from the outside. It appears that in most cases the fire was slowed down by the water application and that external water application had no negative impacts to occupant survivability.
While the fog stream “pushed” steam along the flow path there was no fire “pushed”.
No damage to surrounding rooms: Just as the fire triangle depicts, fire needs oxygen to burn.
A condition that existed in every experiment was that the fire (living room or family room) grew until oxygen was reduced below levels to sustain it.
This means that it decreased the oxygen in the entire house by lowering the oxygen in surrounding rooms and the more remote bedrooms until combustion was not possible.
In most cases surrounding rooms such as the dining room and kitchen had no fire in them even when the fire room was fully involved in flames and was ventilating out of the structure.
Online Training Program
In order to make the results of this study more user friendly for the fire service to examine, UL developed an online interactive training module that can be viewed by clicking here. The program includes a professionally narrated description of all of the experiments, their results and the tactical considerations. Experimental video is used and graphical data is explained in a way that brings science to the street level firefighter.
UL University On-Line CBT
Comparison of Modern and Legacy Home Furnishings
An experiment was conducted with two side by side living room fires. The purpose was to gain knowledge on the difference between modern and legacy furnishings. The rooms measured 12 ft by 12 ft, with an 8 ft ceiling and had an 8 ft wide by 7 ft tall opening on the front wall. Both rooms contained similar amounts of like furnishings.
The modern room was lined with a layer of ½ inch painted gypsum board and the floor was covered with carpet and padding.
The furnishings included a microfiber covered polyurethane foam filled sectional sofa, engineered wood coffee table, end table, television stand and book case.
The sofa had a polyester throw placed on its right side. The end table had a lamp with polyester shade on top of it and a wicker basket inside it.
The coffee table had six color magazines, a television remote and a synthetic plant on it.
The television stand had a color magazine and a 37 inch flat panel television.
The book case had two small plastic bins, two picture frames and two glass vases on it.
The right rear corner of the room had a plastic toy bin, a plastic toy tub and four stuffed toys.
The rear wall had polyester curtains hanging from a metal rod and the side walls had wood framed pictures hung on them.
The legacy room was lined with a layer of ½ inch painted cement board and the floor was covered with unfinished hardwood flooring.
The furnishings included a cotton covered, cotton batting filled sectional sofa, solid wood coffee table, two end tables, and television stand.
The sofa had a cotton throw placed on its right side.
Both end tables had a lamp with polyester shade on top of them.
The one on the left side of the sofa had two paperback books on it.
A wicker basket was located on the floor in front of the right side of the sofa at the floor level.
The coffee table had three hard-covered books, a television remote and a synthetic plant on it.
The television stand had a 27 inch tube television.
The right front corner of the room had a wood toy bin, and multiple wood toys.
The rear wall had cotton curtains hanging from a metal rod and the side walls had wood framed pictures hung on them.
Both rooms were ignited by placing a lit stick candle on the right side of the sofa. The fires were allowed to grow until flashover. The modern room transitioned to flashover in 3 minutes and 30 seconds and the legacy room at 29 minutes and 30 seconds.
Wednesday Night’s Program has been postponed due to Emergent Server issues at BlogTalkRadio.
The Program has been rescheduled for Thursday November 4th at 9:00pm EDT
Turn Out to FireFighter NetCast.com and Taking it to the Streets for; “Redefining the Fire Ground”
If you missed last month’s program on the Tactical Renaissance of Combat Fire Suppression Operations and the new Rules of Engagement, with Chief Gary Morris (ret) Phoenix (AZ) Fire Department and Dr. Burt Clark from the NFA, then you missed out a some great insights and discussion. This month Taking it to the Streets is looking to further the dialog and look at “Redefining the Fire Ground”. Many would argue that the fire ground doesn’t need to be “redefined”; that the way we do business in the Streets is just fine and that the American Fire Service knows how to get the job done, at any cost.
The recent release of the NIST Technical Study of the Sofa Super Store Fire – South Carolina, June 18, 2007 has presented compelling data and information that provides further discernments of how our buildings react under fire conditions and how our tactical assumptions and deployments continue to be willfully miscued. Joining Chris will be Chief Douglas Cline, from the City of High Point FD, North Carolina, a highly regarded national instructor, author, advocate, tactician and incident command.
Don’t miss out on debating and dialoging the transitional fire ground. It is here and it’s here to stay; you just didn’t know that it was changing. But then again, was anyone paying attention? Join the live broadcast on Thursday night November 4th at 9:00pm ET, or download the post production podcast from Firefighter NetCast.com.
For additional Taking it to the Streets programming, HERE
The International Society of Fire Service Instructors is proud to announce the release of “Modern Construction Considerations for Company Officers.” The program is a train-the trainer package that combines the latest research on light weight building construction from National Institute of Standards & Technology (NIST), Underwriters Laboratories(UL), Michigan State University, The International Association of Fire Chiefs (IAFC), and the Chicago Fire Department into a single resource tailored for company-level instruction.
The program was made possible through a Prevention & Research Grant from the Assistance to Firefighters Grant Program and the Department of Homeland Security. The ISFSI partnered with Eastern Kentucky University’s Fire & Safety Engineering Technology Program to analyze line of duty deaths between 1997 and 2009 to study the impact that lightweight construction has had on firefighters and firefighting operations.
The DVD included in the program package contains all of the instructional resources necessary to provide quality training on this important topic. A wide variety of support materials are included to provide the user a deep understanding of the challenges with modern building construction techniques. Instructors can tailor the program to meet the needs of their audience, including a 2-hour brief up to a week-long program.
The program will be distributed to all members of the ISFSI as a free member benefit. The ISFSI has also partnered with the Safety & Health Section of the IAFC to provide a copy to each of its members. ISFSI President, Eddie Buchanan, was on hand at the Safety & Health Section Meeting at FRI to personally deliver Chief Billy Goldfeder his copy as chair of the section. All members should expect their copy to arrive in their mailboxes over the next week.
“I would like to extend a heartfelt thank you to the ISFSI members and staff who worked so hard to bring this product to firefighters across America and the globe. It is truly a lifesaving program and a fantastic use of grant funds. It is critical that this package get into the hands of every instructor and fire officer to ensure they are educated and prepared to handle the real risk that looms out there on the next call,” said President Buchanan.
Check out the International Society of Fire Service Instructor’s (ISFSI) web site HERE.
Not a member? Take the time to sign up and get connected.
BuildingsonFire 2010; Building Construction, Command Risk Management and Operational Safety
Major Influencing Fire Service Reports, Issues or Focus that should be on Your Radar Screen
The following list is but a modest cross section of pertinent information or focus areas today’s Firefighter, Company or Command Officer MUST be knowledgeable in, have insights and proficiency based technical skills to function with a level of competencies demanded in today’s fire service.
If these are not on your radar screen or you haven’t got a blip of a clue what they’re about; then you are derelict and not doing your job- and the end result could be a less than desirable outcome on the fireground; it’s that simple, it’s that direct.
Have you read these reports, understand the issues & influences, increased your knowledge, skills and abilities in any gap areas or taken the time to research the cutting edge issues affecting today’s fire service?
The City of Charleston Sofa Super Store LODD-Routley Fire Report
Read the report; understand the incident, the building performance, the fire behavior and the operation process deployed. Gain the insights from the overall apparent and contributing causes identified and presented and assess how these relate to your fire service perspective and department’s culture and performance today.
City of Charleston Post Incident Assessment and Review Team Phase I Report, HERE
NIOSH investigators concluded that, to minimize the risk of similar occurrences, fire departments should:
develop, implement and enforce written standard operating procedures (SOPs) for an occupational safety and health program in accordance with NFPA 1500
develop, implement, and enforce a written Incident Management System to be followed at all emergency incident operations
develop, implement, and enforce written SOPs that identify incident management training standards and requirements for members expected to serve in command roles
ensure that the Incident Commander is clearly identified as the only individual with overall authority and responsibility for management of all activities at an incident
ensure that the Incident Commander conducts an initial size-up and risk assessment of the incident scene before beginning interior fire fighting operations
train fire fighters to communicate interior conditions to the Incident Commander as soon as possible and to provide regular updates
ensure that the Incident Commander establishes a stationary command post, maintains the role of director of fireground operations, and does not become involved in fire-fighting efforts
ensure the early implementation of division / group command into the Incident Command System
ensure that the Incident Commander continuously evaluates the risk versus gain when determining whether the fire suppression operation will be offensive or defensive
ensure that the Incident Commander maintains close accountability for all personnel operating on the fireground
ensure that a separate Incident Safety Officer, independent from the Incident Commander, is appointed at each structure fire
ensure that crew integrity is maintained during fire suppression operations
ensure that a rapid intervention crew (RIC) / rapid intervention team (RIT) is established and available to immediately respond to emergency rescue incidents
ensure that adequate numbers of staff are available to immediately respond to emergency incidents
ensure that ventilation to release heat and smoke is closely coordinated with interior fire suppression operations
conduct pre-incident planning inspections of buildings within their jurisdictions to facilitate development of safe fireground strategies and tactics
consider establishing and enforcing standardized resource deployment approaches and utilize dispatch entities to move resources to fill service gaps
develop and coordinate pre-incident planning protocols with mutual aid departments
ensure that any offensive attack is conducted using adequate fire streams based on characteristics of the structure and fuel load present
ensure that an adequate water supply is established and maintained
consider using exit locators such as high intensity floodlights or flashing strobe lights to guide lost or disoriented fire fighters to the exit
ensure that Mayday transmissions are received and prioritized by the Incident Commander
train fire fighters on actions to take if they become trapped or disoriented inside a burning structure
ensure that all fire fighters and line officers receive fundamental and annual refresher training according to NFPA 1001 and NFPA 1021
implement joint training on response protocols with mutual aid departments
ensure apparatus operators are properly trained and familiar with their apparatus
protect stretched hose lines from vehicular traffic and work with law enforcement or other appropriate agencies to provide traffic control
ensure that fire fighters wear a full array of turnout clothing and personal protective equipment appropriate for the assigned task while participating in fire suppression and overhaul activities
ensure that fire fighters are trained in air management techniques to ensure they receive the maximum benefit from their self-contained breathing apparatus (SCBA)
develop, implement and enforce written SOPS to ensure that SCBA cylinders are fully charged and ready for use
use thermal imaging cameras (TICs) during the initial size-up and search phases of a fire
develop, implement and enforce written SOPs and provide fire fighters with training on the hazards of truss construction
establish a system to facilitate the reporting of unsafe conditions or code violations to the appropriate authorities
ensure that fire fighters and emergency responders are provided with effective incident rehabilitation
provide fire fighters with station / work uniforms (e.g., pants and shirts) that are compliant with NFPA 1975 and ensure the use and proper care of these garments.
Additionally, federal and state occupational safety and health administrations should:
consider developing additional regulations to improve the safety of fire fighters, including adopting National Fire Protection Association (NFPA) consensus standards.
Additionally, manufacturers, equipment designers, and researchers should:
continue to develop and refine durable, easy-to-use radio systems to enhance verbal and radio communication in conjunction with properly worn SCBA
conduct research into refining existing and developing new technology to track the movement of fire fighters inside structures.
Additionally, code setting organizations and municipalities should:
require the use of sprinkler systems in commercial structures, especially ones having high fuel loads and other unique life-safety hazards, and establish retroactive requirements for the installation of fire sprinkler systems when additions to commercial buildings increase the fire and life safety hazards
require the use of automatic ventilation systems in large commercial structures, especially ones having high fuel loads and other unique life-safety hazards.
Additionally, municipalities and local authorities having jurisdiction should:
coordinate the collection of building information and the sharing of information between building authorities and fire departments
consider establishing one central dispatch center to coordinate and communicate activities involving units from multiple jurisdictions
ensure that fire departments responding to mutual aid incidents are equipped with mobile and portable communications equipment that are capable of handling the volume of radio traffic and allow communications among all responding companies within their jurisdiction.
Everyone Goes Home Campaign
Everyone Goes Home® is a national program by the National Fallen Firefighters Foundation to prevent line-of-duty deaths and injuries. In March 2004, a Firefighter Life Safety Summit was held to address the need for change within the fire service. At this summit, the 16 Firefighter Life Safety Initiatives were created and a program was born to ensure that Everyone Goes Home®.
Recognizing the need to do more to prevent line-of-duty deaths and injuries, the National Fallen Firefighters Foundation has launched a national initiative to bring prevention to the forefront.
In March 2004, the Firefighter Life Safety Summit was held in Tampa, Florida to address the need for change within the fire and emergency services. Through this meeting, 16 Life Safety Initiatives were produced to ensure that Everyone Goes Home®.
The first major action was to sponsor a national gathering of fire and emergency services leaders. The National Fallen Firefighters Foundation will play a major role in helping the U.S. Fire Administration meet its stated goal to reduce the number of preventable firefighter fatalities. The Foundation sees fire service adoption of the summit’s initiatives as a vital step in meeting this goal.
Media CenterUsing variations of the Courage to Be Safe ®…So Everyone Goes Home® field program, along with material from the Firefighter Life Safety Initiatives Resource Kit we will develop and deploy a new online learning segment each month. These online learning segments will allow you to expand upon your personal and professional development when you want and how you want. Watch them by yourself or integrate them into your organizational training programs. Remember, that safety results from constant training and putting those skills to work everyday, on every call – SO EVERYONE GOES HOME. HERE
The Firefighter Life Safety Initiatives Advocates Program will play a key role in helping to bring about awareness of the Initiatives and act as a conduit for resources to enable departments to implement and advocate them. HERE
The 16 Fire Fighter Life Safety Initiatives
Define and advocate the need for a cultural change within the fire service relating to safety; incorporating leadership, management, supervision, accountability and personal responsibility.
Enhance the personal and organizational accountability for health and safety throughout the fire service.
Focus greater attention on the integration of risk management with incident management at all levels, including strategic, tactical, and planning responsibilities.
All firefighters must be empowered to stop unsafe practices.
Develop and implement national standards for training, qualifications, and certification (including regular recertification) that are equally applicable to all firefighters based on the duties they are expected to perform.
Develop and implement national medical and physical fitness standards that are equally applicable to all firefighters, based on the duties they are expected to perform.
Create a national research agenda and data collection system that relates to the initiatives.
Utilize available technology wherever it can produce higher levels of health and safety.
Thoroughly investigate all firefighter fatalities, injuries, and near misses.
Grant programs should support the implementation of safe practices and/or mandate safe practices as an eligibility requirement.
National standards for emergency response policies and procedures should be developed and championed.
National protocols for response to violent incidents should be developed and championed.
Firefighters and their families must have access to counseling and psychological support.
Public education must receive more resources and be championed as a critical fire and life safety program.
Advocacy must be strengthened for the enforcement of codes and the installation of home fire sprinklers.
Safety must be a primary consideration in the design of apparatus and equipment.
NIST Wind Driven Fire Study
Smoke and heat spreading through the corridors and the stairs of a building during a fire can limit building occupants’ ability to escape and can limit fire fighters’ ability to rescue them. Changes in the building’s ventilation or presence of an external wind can increase the energy release of the fire. This can also increase the spread of fire gases through the building. In some cases, such as the Cook County Administration Building fire in October 2003, the fire gas flow, into the corridors and the stairway prevented fire fighters from suppressing the fire from inside the structure. This fire resulted in 6 building occupant fatalities and fire fighter injuries in the stairway. The Fire Department of New York City has experienced many wind driven fire incidents which have resulted in fire fighter fatalities and injuries, as have a number of other incidents nationally that have resulted in increased research into this operational and tactical challenge.
What tactics or tools are appropriate for use with a wind driven fire and how should the tactics or tools be implemented? Positive Pressure Ventilation (PPV) is being used by fire departments on smaller structures, such as single family homes, to control the fire flow by introducing pressure from the front door and venting the house through a strategic exit opening. If done correctly, this tactic can remove significant amounts of heat and smoke from the structure, thus improving the fire fighters’ working environment and improving the chances of survival for the building occupants. NIST has completed several studies which have a two fold impact: 1) providing guidance on the safe use of PPV and 2) characterizing and validating the modeling of PPV with a computational fluid dynamics (CFD) computer model, so that the model can be used as a training tool for the fire service.
This project extends previous work for ventilation under wind driven conditions. There are many questions regarding wind driven fires. For example can these PPV fans be used successfully under wind driven fire conditions in large structures? Large structures, such as high rise buildings, provide additional challenges to fire fighter and building occupant safety: increased travel distance (exposure time), more complicated egress path, and potentially larger fires. In 2002 there were 7,300 reported fires in high rise structures.
Other tactics incorporating devices, such as wind control devices (WCD) to control the ventilation conditions or the use of a “high rise” nozzle from the floor below the fire floor have been tried by the fire service under “real fire” conditions with varying levels of success.
A comprehensive free DVD set from the NIST includes a presentation video that explains PPV, examines the results of NIST’s PPV research, and closes with a focus on the use of PPV tactics in high-rise buildings. All of the NIST PPV reports referenced in the presentation are included on Disc 1 of the set. All of the videos from the high-rise fire experiments are also provided with a user-friendly, graphic menu that can be used on a PC or a DVD player. NIST, with support from USFA, DHS, and fire departments across the country, has taken engineering principles and applied them to fire service PPV tactics in order to improve fire fighter safety
NIST Fire Fighting Tactics Under Wind Driven Conditions: Laboratory Experiments
A series of experiments was conducted in our Large Fire Laboratory to examine the impact of wind control curtains and externally applied hose streams on a wind driven fire. The results from these experiments will allow us to better understand the fire dynamics within a structure and provide guidance as to the important measurements needed in the future experiments in a high-rise on Governor’s Island in New York City.
Fire Fighting Tactics Under Wind Driven Conditions Report, HERE
NIST Firefighter Safety and Deployment Study; Report on Residential Fireground Field Experiments
The NIST Firefighter Safety and Deployment Study; Titled- Report on Residential Fireground Field Experiments was recently released to the public providing . A copy of the report is attached.
Report Abstract:
Service expectations placed on the fire service, including Emergency Medical Services (EMS), response to natural disasters, hazardous materials incidents, and acts of terrorism, have steadily increased. However, local decision-makers are challenged to balance these community service expectations with finite resources without a solid technical foundation for evaluating the impact of staffing and deployment decisions on the safety of the public and firefighters. For the first time, this study investigates the effect of varying crew size, first apparatus arrival time, and response time on firefighter safety, overall task completion, and interior residential tenability using realistic residential fires.
This study is also unique because of the array of stakeholders and the caliber of technical experts involved. Additionally, the structure used in the field experiments included customized instrumentation; all related industry standards were followed; and robust research methods were used. The results and conclusions will directly inform the NPFA 1710 Technical Committee, who is responsible for developing consensus industry deployment standards.
This report presents the results of more than 60 laboratory and residential fireground experiments designed to quantify the effects of various fire department deployment configurations on the most common type of fire—a low hazard residential structure fire. For the fireground experiments, a 2,000 sq ft (186 m2), two-story residential structure was designed and built at the Montgomery County Public Safety Training Academy in Rockville, MD. Fire crews from Montgomery County, MD and Fairfax County.
Report results quantify the effectiveness of crew size, first-due engine arrival time, and apparatus arrival stagger on the duration and time to completion of the key 22 fireground tasks and the effect on occupant and firefighter safety.
The report is also available for download at the NIST, HERE
USFA/NIST Trends in Firefighter Fatalities Due to Structural Collapse, 1979-2002
Between the years 1979 and 2002 there were over 180 firefighter fatalities due to structural collapse, not including those firefighters lost in 2001 in the collapse of the World Trade Center Towers. Structural collapse is an insidious problem within the fire fighting community. It often occurs without warning and can easily cause multiple fatalities.
As part of a larger research program to help reduce firefighter injuries and fatalities the U.S. Fire Administration (USFA) funded the National Institute of Standards and Technology (NIST) to examine records and determine if there were any trends and/or patterns that could be detected in firefighter fatalities due to structural collapse. If so, these trends could be brought immediately to the attention of training officers and incident commanders and investigated further to determine probable causes.
UL Structural Stability of Engineered Lumber in Fire Conditions
Base on the UL research and
This two-hour presentation summarizes a research study on the hazards posed to firefighters by the use of lightweight construction and engineered lumber in floor and roof designs. This free on-line computer based presentation will allow fire professionals to better interpret fire hazards and assess risk for life safety of building occupants and firefighters.
This online firefighter training course is the result of a research partnership among UL, the Chicago Fire Department, IAFC, and Michigan State University, funded in part by the U.S. Department of Homeland Security. This self-guided course, which focuses on the structural stability of engineered lumber under fire conditions, is targeted toward the 1.1 million fire service personnel in the United States and Canada. The knowledge developed and shared in this course is critically important to firefighter and civilian safety.
This two-hour presentation summarizes a research study on the hazards posed to firefighters by the use of lightweight construction and engineered lumber in floor and roof designs. This free on-line computer based presentation will allow fire professionals to better interpret fire hazards and assess risk for life safety of building occupants and firefighters.
Program Objectives:
Provide brief history of events leading up to DHS Grant tests
Identify the fire test hypothesis, parameters, and steps completed in the testing process
Compare tests results (legacy vs. modern construction)
Communicate learnings from our partners representing the fire service
USFA/NIST Trends in Firefighter Fatalities Due to Structural Collapse, 1979-2002
Between the years 1979 and 2002 there were over 180 firefighter fatalities due to structural collapse, not including those firefighters lost in 2001 in the collapse of the World Trade Center Towers. Structural collapse is an insidious problem within the fire fighting community. It often occurs without warning and can easily cause multiple fatalities.
As part of a larger research program to help reduce firefighter injuries and fatalities the U.S. Fire Administration (USFA) funded the National Institute of Standards and Technology (NIST) to examine records and determine if there were any trends and/or patterns that could be detected in firefighter fatalities due to structural collapse. If so, these trends could be brought immediately to the attention of training officers and incident commanders and investigated further to determine probable causes.
Each year an average of 105 fire fighters die in the line of duty. To address this continuing national occupational fatality problem, NIOSH conducts independent investigations of fire fighter line of duty deaths. The dedicated web page provides access to NIOSH investigation reports and other fire fighter safety resources.
Through the Fire Fighter Fatality Investigation and Prevention Program, NIOSH conducts investigations of fire fighter line-of-duty deaths to formulate recommendations for preventing future deaths and injuries. The program does not seek to determine fault or place blame on fire departments or individual fire fighters, but to learn from these tragic events and prevent future similar events.
NIOSH Alert: Preventing Deaths and Injuries of Fire Fighters using Risk Management Principles at Structure Fires
Fire fighters are often killed or injured when fighting fires in abandoned, vacant, and unoccupied structures.
These structures pose additional and sometimes unique risks due to the potential for fire fighters to encounter unexpected and unsafe building conditions such as dilapidation, decay, damage from previous fires and vandals, and other factors such as uncertain occupancy status. Risk management principles must be applied at all structure fires to ensure the appropriate strategy and tactics are used based on the fireground conditions encountered.
NIOSH Report; Preventing Deaths and Injuries of Fire Fighters Working Above Fire Damaged Floors
Fire fighters are at risk of falling through fire-damaged floors. Fire burning underneath floors can significantly degrade the floor system with little indication to fire fighters working above.
Floors can fail within minutes of fire exposure, and new construction technology such as engineered wood floor joists may fail sooner than traditional construction methods.
NIOSH recommends that fire fighters use extreme caution when entering any structure that may have fire burning beneath the floor.
NIOSH ALERT: Preventing Injuries and Deaths of Fire Fighters due to Truss System Failures
Fire fighters may be injured and killed when fire-damaged roof and floor truss systems collapse, sometimes without warning.
The National Institute for Occupational Safety and Health (NIOSH) requests assistance in preventing injuries and deaths of fire fighters due to roof and floor truss collapse during fire-fighting operations. Roof and floor truss system collapses in buildings that are on fire cannot be predicted and may occur without warning.
NIOSH recommends that fire departments review their occupational safety programs and standard operating procedures to ensure they include safe work practices in and around structures that contain trusses. Building owners should follow proper building codes and consider posting building construction information outside a building to advise fire fighters of the conditions they may encounter.
National Near Miss Reporting System (NNMRS) Operating Experience
The National Fire Fighter Near-Miss Reporting System is a voluntary, confidential, non-punitive and secure reporting system with the goal of improving fire fighter safety.
Submitted reports will be reviewed by fire service professionals. Identifying descriptions are removed to protect your identity. The report is then posted on this web site for other fire fighters to use as a learning tool.
National Fire Fighter Near-Miss Reporting System Web Site, HERE
USFA Incident Reports (Stop History Repeating Events-HRE)
USFA provides information resources in many formats, including books, pamphlets and DVD’s, free of charge.
The U.S. Fire Administration develops reports on selected major fires throughout the country. The fires usually involve multiple deaths or a large loss of property. But the primary criterion for deciding to do a report is whether it will result in significant “lessons learned.” In some cases these lessons bring to light new knowledge about fire–the effect of building construction or contents, human behavior in fire, etc. In other cases, the lessons are not new but are serious enough to highlight once again, with yet another fire tragedy report. In some cases, special reports are developed to discuss events, drills, or new technologies which are of interest to the fire service.
The reports are sent to fire magazines and are distributed at National and Regional fire meetings. The International Association of Fire Chiefs assists the USFA in disseminating the findings throughout the fire service. On a continuing basis the reports are available on request from the USFA; announcements of their availability are published widely in fire journals and newsletters
This body of work provides detailed information on the nature of the fire problem for policymakers who must decide on allocations of resources between fire and other pressing problems, and within the fire service to improve codes and code enforcement, training, public fire education, building technology, and other related areas.
The Fire Administration, which has no regulatory authority, sends an experienced fire investigator into a community after a major incident only after having conferred with the local fire authorities to insure that the assistance and presence of the USFA would be supportive and would in no way interfere with any review of the incident they are themselves conducting. The intent is not to arrive during the event or even immediately after, but rather after the dust settles, so that a complete and objective review of all the important aspects of the incident can be made
Prince William County (VA) Fire Rescue Kyle Wilson LODD Report
The Prince William County (VA) Department of Fire and Rescue published a comprehensive line of duty death report for Technician I Kyle R. Wilson on Saturday, January 26, 2008. Technician I Wilson was the first line of duty death in the Department’s 41-year history. The Department is sharing the LODD Investigative Report to honor Kyle, and in an effort to reduce and prevent firefighter line of duty deaths at the local, region, state, and national levels.
Technician Kyle Robert Wilson was 24-years old and was born in Olney, Maryland. He grew up in Prince William County and graduated from Hylton High School and George Mason University. He was an avid baseball and softball player. Technician Wilson joined the Prince William County Department of Fire and Rescue on January 23, 2006. Technician Kyle Wilson died in the line of duty on April 16, 2007 while performing search and rescue operations at a house fire on Marsh Overlook Drive, located in the Woodbridge area of Prince William County. On that day, Technician Wilson was part of the firefighter staffing on Tower 512 which responded to the house fire that was dispatched at 0603 hours. The Prince William County area was under a high wind advisory as a nor’eastern storm moved through the area. Sustained winds of 25 mph with gusts up to 48 mph were prevalent in the area at the time of the fire dispatch to Marsh Overlook Drive.
Initial arriving units reported heavy fire on the exterior of two sides of the single family house and crews suspected that the occupants were still inside the house sleeping because of the early morning hour. A search of the upstairs bedroom commenced for the possible victims. A rapid and catastrophic change of fire and smoke conditions occurred in the interior of the house within minutes of Tower 512’s crew entering the structure.
Technician Wilson became trapped and was unable to locate an immediate exit out of the hostile environment. Mayday radio transmissions were made by crews and by Technician Kyle Wilson of the life-threatening situation. Valiant and repeated rescue attempts to locate and remove Technician Wilson were made by the firefighting crews during extreme fire, heat and smoke conditions. Firefighters were forced from the structure as the house began to collapse on them and intense fire, heat and smoke conditions developed. Technician Wilson succumbed to the fire and the cause of death was reported by the medical examiner to be thermal and inhalation injuries.
The Department of Fire and Rescue immediately formed a multi-dimensional investigation team following the incident. The investigation team was comprised of five Department of Fire and Rescue uniform personnel and two external members from area fire departments. For eight months, the team thoroughly examined the events that occurred at the Marsh Overlook fire incident and identify the factors involved with the line of duty death of Technician I Kyle Wilson. The resulting report represents thousands of hours of effort to analyze fire and rescue operations and is a factual representation of the events that occurred. The report also provides a frame work for organizational level improvements.
The major factors in the line of duty death of Technician I Wilson were determined to be:
The initial arriving fire suppression force size.
The size up of fire development and spread.
The impact of high winds on fire development and spread.
The large structure size and lightweight construction and materials.
The rapid intervention and firefighter rescue efforts.
The incident control and management.
The Marsh Overlook fire incident was an immense fire fueled by extremely flammable building material products and a vicious wind. It was an environment where information gathering and decision making had to be performed in the time measurement of seconds. During the chain of events that occurred and under severe circumstances, fire and rescue personnel performed at exceptional levels.
During the repeated attempts to reach and rescue Technician I Wilson, personnel displayed heroic efforts and jeopardized their own safety. The Department will never forget the sacrifice that Technician Wilson made in an attempt to ensure others were safe. By sharing the knowledge gained from this very tragic and painful incident, the Department will ensure his sacrifice was not in vain and hope that other fire and rescue departments can avoid another similar occurrence.
Prince William County (VA) Fire and Rescue Web Site, HERE
Loudoun County (VA) Fire Rescue Significant Near Miss Event Report
On May 25, 2008, fire and rescue personnel from Loudoun County responded to a structure fire at 43238 Meadowood Court in Leesburg, Virginia. During the course of the incident, seven responders were injured. Of those injured, four firefighters received significant burn injuries, two firefighters sustained orthopedic injuries, and one EMS provider was treated for minor respiratory distress. To date, five of the injured personnel have returned to duty. Two firefighters continue to recover from their injuries, including one who was severely burned.
Given the severity of the injuries and magnitude of the event, an independent Investigative Team was assembled to review the incident. The Team was comprised of four Loudoun County personnel, three external members from area fire departments, and two resource/support personnel. The Team was tasked with reviewing “the events leading up to the incident, the incident operation(s), the firefighter MAYDAY(s), and incident mitigation.”
For three months, the Team thoroughly examined the events surrounding the Meadowood Court fire incident and identified the factors associated with the injury of personnel.
The Report contains the results of the Investigative Team’s comprehensive review and analysis.
SIGNIFICANT INJURY INVESTIGATIVE REPORT 43238 MEADOWOOD COURT MAY 25, 2008 Report HERE
Worcester (MA) Fire Cold Storage Fire LODD Report; Abandoned Cold Storage Warehouse Multi-Firefighter Fatality Fire 1999, Worcester, Massachusetts
A technical review of the 1999 Worcester, MA fire that claimed six firefighters concludes that abandoned buildings are a serious threat to firefighters and fire departments must make a concerted effort to use technology to maintain data on buildings in their response districts.
On Friday, December 3, 1999, at 1813 hours, the Worcester, Massachusetts Fire Department dispatched Box 1438 for 266 Franklin Street, the Worcester Cold Storage and Warehouse Co. A motorist had spotted smoke coming from the roof while driving on an adjacent elevated highway. The original building was constructed in 1906, contained another 43,000 square feet. Both were 6 stories above grade. The building was known to be abandoned for over 10 years.
Eleven minutes into the fire, the owner of the abutting Kenmore Diner advised fire operations of two homeless people who might be living in the warehouse. The rescue company, having divided into two crews, started a building search. Some 22 minutes later the rescue crew searching down from the roof became lost in the vast dark spaces of the fifth floor. They were running low on air and called for help. Interior conditions were deteriorating rapidly despite efforts to extinguish the blaze, and visibility was nearly lost on the upper floors. Investigators have placed these two firefighters over 150 feet from the only available exit.
An extensive search was conducted by Worcester Fire crews through the third and fourth alarms. Suppression efforts continued to be ineffective against huge volumes of petroleum based materials, and ultimately two more crews became disoriented on the upper floors and were unable to escape. When the evacuation order was given one hour and forty-five minutes into the event, five firefighters and one officer were missing. None survived.
A subsequent exterior attack was set up and lasted for over 20 hours utilizing aerial pieces and deluge guns from Worcester and neighboring departments. Task force groups from across the State of Massachusetts responded to initial suppression and subsequent recovery efforts. During this time, the four upper floors collapsed onto the second which became known as “the deck”. Over 6 million gallons of water were used during the suppression efforts. According to NFPA records, this is the first loss of six firefighters in a structure fire where neither building collapse nor an explosion was a contributing factor to the fatalities.
Colerain Township (OH) Fire and EMS Department Final Report Investigation Analysis of the Squirrels Nest Lane Firefighter Line of Duty Deaths
The Colerain Township (OH) Fire and EMS Department under the leadership of Director and Chief G. Bruce Smith recently released its final report Investigation Analysis of the Squirrels nest Lane Firefighter Line of Duty Deathsrelated to the April 4, 2008 Double Line of Duty Death of a Captain and Firefighter. This investigative analysis and report, although specific to the events and conditions encountered during the conduct of operation at the residential occupancy at 5708 Squirrels nest Lane has pertinent and relevant insights, recommendations and factors that all Fire Service personnel, regardless of rank should read.
Take a good look at the structures, occupancies and buildings in you first, second and third due areas, look around your community and jurisdiction as well as your mutual aid and greater alarm response box areas.
Have you stopped for a minute today and taken a good look around? Whether you’re sitting in the front seat at the stop light of an intersection or as you’re peering out the side cab window coming back from an alarm or while running errands in your POV; have you taken a good look around? As the Springsteen song goes; “this is your town”.
There’s a lot that can be gleaned from your surroundings on any given day. We sometimes take for granted the subtle changes that are happening all around us as we take care of business on our rounds, runs and calls. We tend to focus in on the immediacy of the events that are happening in front of us that demand our attention but fail to take a look around to pick up on information, data and insights that can help us on that next run or down the road in the future.
Take a look at the construction that might be going up in your areas. I’m certain you’re paying close attention to what’s happening in your first-due, but what about that third-due area, that neighboring jurisdiction or the mutual-aid area that you occasionally run in to? When you’re on that next EMS run or an investigation of an odor or alarm bells service call, take a few extra minutes to walk through the occupancy. Conduct your own mini company level pre-plan.
Look at the layout, features, access and construction features. If you have a chance, verify the structural support systems employed by the building for the floor and roof systems. If you have time, take the company on a quick site visit to that building that’s under construction or the renovations that are again underway in that commercial or business occupancy around the corner from quarters.
These continuing challenging economic times places a great deal of influence on what’s being built, how it might be constructed, the manner in which a building may be operational one day, vacant the other and under renovation the next. Sometimes these transformations occur literally overnight.
I continue to suggest that it’s no longer just brute force and sheer physical determination that define structural fire suppression operations, although any seasoned firefighter and company officer knows that at times; it is what gets the job done under the most arduous and demanding of circumstances. However, from a methodical and disciplined perspective, aggressive firefighting must be redefined and aligned to the built environment and associated with goal oriented tactical operations that are defined by risk assessed and analyzed tasks that are executed under battle plans that promote the best in safety practices and survivability within know hostile structural fire environments.
We can still meet the demands of the job, as firefighters; but do it with Tactical Patience and not at the expense of Command Compression and Tactical Entertainment or worst Operational Recklessness.
The traditional attitudes and beliefs of equating aggressive firefighting operations in all occupancy types coupled with the correlating, established and pragmatic operational strategies and tactics must be adjusted and modified to include intelligent risk assessment, calculated risk analysis, safety and survivability profiling, and strategic operational and tactical value. The demands and requirements of modern firefighting will continue to require the placement of personnel within situations and buildings that carry risk, uncertainty and inherent danger. As a result, risk management must become fluid and integrated with intelligent tactical deployments and operations recognizing the risk problematically and not fatalistically, resulting in safety conscious strategies and tactics. We need to think about the Predicative Strategic Process, refined Tactical Deployment Models integrating intelligent Structural Anatomy and Predictive Occupancy Profiling.
Without understanding the building-occupancy relationships and integrating; construction, occupancies, fire dynamics and fire behavior, risk, analysis, the art and science of firefighting, safety conscious work environment concepts and effective and well-informed incident command management, company level supervision and task level competencies…You are derelict and negligent and “not “everyone may be going home”. Our current generation of buildings, construction and occupancies are not as predictable as past conventional construction; risk assessment, strategies and tactics must adjusted and enhanced to address these new rules of structural fire engagement. There is a profound need to gain building construction knowledge and insights and to change and adjust operating profiles in order to safe guard companies, personnel and team compositions. It’s all about understanding the building-occupancy relationships and the art and science of firefighting, Building Knowledge = Firefighter Safety. Its all about the new formula….Bk=F2S.
Additionally, think about the following
Don’t Treat Your Buildings and Occupancies the Same anymore
Increase Situational Awareness
Increase Your Competencies
Know Your Buildings
Be aware of Command Compression
Implement Tactical Patience
Tactical Entertainment
Building Knowledge = Firefighter Safety
Fire Behavior & Fire Dynamics
Situational Awareness
Naturalistic Decision Making
More on these and some additional key reports on a future post…..
It’s no longer just brute force and sheer physical determination that define structural fire suppression operations. Aggressive firefighting must be redefined and aligned to the built environment and associated with goal oriented tactical operations that are defined by risk assessed and analyzed tasks that are executed under battle plans that promote the best in safety practices and survivability within known hostile structural fire environments, while maintaining the values and traditions that defines the fire service.”- Christopher Naum
The lack of appreciation and the understanding of correlating principles involving fire behavior, fuel and rate of heat release and the growth stages of compartment fires within a structural occupancy are the defining paths from which the fire service must reexamine coordinated suppression operations in order to identify with; the predictability of occupancy performance during fire suppression operations, thus increasing suppression effectiveness and firefighter safety.
Our buildings have changed; the structural systems of support, the degree of Compartmentation, the characteristics of materials and the magnitude of fire loading. The structural anatomy, predictability of building performance under fire conditions, structural integrity and the extreme fire behavior; accelerated growth rate and intensively levels typically encountered in buildings of modern construction during initial and sustained fire suppression have given new meaning to the term combat fire engagement.
It begs to suggest that many of today’s incident commanders, company officers and firefighters lack the clarity of understanding and comprehension that correlate to the inherent characteristics of today’s buildings, construction and occupancies and the need for refined suppression operations within the modern building construction setting.
We assume that the routiness or successes of our operations and incident responses equates with predictability and diminished risk to our firefighting personnel. Does your company, your officers, your commanders, your department treat all things as equals when addressing the variables of structural combat fire operations? Is the equation of Occupancy Risk balanced with Occupancy Type? Are inherent structural stability and compromise conditions adequately identified and considered in the evolving progression of an incident action plan? Or do SOP and SOG’s drive the manner in which fire ground strategies and tactics are orchestrated and implemented at the company task level?
How does this fit into your “culture, values and philosophy as a firefighter, officer or commander?”
Dynamic Risk Assessment is commonly used to describe a process of risk assessment being carried out in a changing or evolving environment, where what is being assessed is developing as the process itself is being undertaken.
This is further problematical for the Incident Commander when confronted with competing or conflicting incident priorities, demands or distractions before a complete appreciation of all mission critical or essential information and data has been obtained. The dynamic management of risk is all about effective, informed and decisive decision making during all phases of an incident.
Situation Awareness, [SA], is the perception of environmental elements within a volume of time and space, the comprehension of their meaning, and the projection of their status in the near future. It is also a field of study concerned with perception of the environment critical to decision-makers in complex, dynamic situations and incidents.
Both the 2006 and 2007 Firefighter Near-Miss Reporting System Annual Reports identified a lack of situational awareness as the highest contributing factor to near misses reported. Situation Awareness (SA) involves being aware of what is happening around you at an incident to understand how information, events, and your own actions will impact operational goals and incident objectives, both now and in the near future. Lacking SA or having inadequate SA has been identified as one of the primary factors in accidents attributed to human error (Hartel, Smith, & Prince, 1991) (Nullmeyer, Stella, Montijo, & Harden, 2005). Situation Awareness becomes especially important in work related domains where the information flow can be quite high and poor decisions can lead to serious consequences.
To the Incident commander, Fire Officer or firefighter, knowing what’s going on around you, and understanding the consequences is mission critical to incident stabilization and mitigation and profoundly crucial in terms of personnel safety. The integration of Situational Awareness and Dynamic Risk Assessment is a mission critical element in strategic incident command management and company level tactical operations as we go forward into the next decade.
Traditional incident scene size-up is antiquated and no longer appropriate or applicable to modern fire service operations.Situational awareness is a combination of attitudes, previously learned knowledge and new information gained from the incident scene and environment that enables the strategic commanders, decision-makers and tactical companies to gather the information they need to make effective decisions that will keep their firefighters and resources out of harm’s way, reducing the likelihood of adverse or detrimental effects.
According to a 1998 published TriData study report, “Situational Awareness is one of the most difficult skills to master and is a weakness in the fire community. The report goes on to state that “The culture must change so that [personnel] are observing, thinking, and discussing the situation constantly.” It’s all about implementing effective human performance tools; perceptions versus reality, expectations versus realization, comprehension and forecasting, informed decision-making and calculated and formulated risk.
It’s a whole lot more than just “Size-Up”. What do you think?
As the end of the year fast approaches and in turn the end of the decade, it amazes me how “fast” time seems to have passed. Certainly when looking back and reflecting upon the past year or the previous few years, each of us thinks and contemplates upon those events, milestones, anniversaries, highlights as well as those common everyday occurrences that seem to permeate back and forth in our minds and hang at times like the smoke from a smoldering contents fire. When reflecting, there are the good times as well as those that were not so good. There are those events that were life altering and changing that forever formulate a different view upon each of our respective worlds we live and work within. As well as those events that have provided us with the joys and virtue of what we do everyday as firefighters both on and off the job, at the firehouse and at home.
For each or us, the events that form and shape our worlds; our families at home and our families at the fire station and within the fire department or agencies we volunteer or work for, leave indelible marks upon us that at times formulate and transcend us. My good friend Chief Ben Waller reflected upon a number of issues and insights in his recent post that was right on the mark as did my partner Chief Doug Cline in his perspective of 2009 and for 2010. A lot has happened to this our Fire Service during the past ten years and most certainly in the past twelve months that has shaped and forged a new generation of firefighters and tempered the existing veterans. Stop and think about it.
Looking back at 2009 and in the waning decade, the one certainty that we all share is that we have the ability and look forward to a new year, a new decade and to new challenges. Prior to this week, the 2009 Firefighter LODD events that sadly have occurred seemed like it would pause and we’d end the year with no further events. Tragically, in the past few days, five additional line-of-duty deaths have been reported through the USFA. From the events of 9-11, to the seeds that were planted in Tampa and the crusade that was embarked upon to ensure everyone [has] the opportunity to go home, through the tragedy, wake-up call and the lessons-learned from Charleston. A lot has happened, many tears have been shed, alot was learned, with so much more work still remaining.
As of this posting, the United States Fire Service has borne ninety-three (93) LODDs this year. In comparison to previous years, this may finally indicate a turning point in the previous escalating trends in LODD we’ve experienced during the past decade. Take a moment to look through the USFA postings and the narratives of each of the firefighters who made the supreme sacrifice in 2009 and reflect upon the circumstances and events that lead to their respective LODD incident. Take the time to spend an evening reading through some of the recent or past reports published on the NIOSH Fire Fighter Fatality Investigation and Prevention Program web site. Look the History Repeating Events (HRE) and think about what you can do to champion changes in your organization, department or company to eliminate or reduce the likelihood for a similar event from occurring to you or your organization.
The formulative and diligent efforts of the NFFF and the Everyone Goes Home Program and the Sixteen Firefighter Life Safety Initiatives have made their mark in this decade and must continue to be embraced and institutionalized as we move forward to twenty ten. Don’t forget about the inroads made by the National Firefigher Near-Miss Reporting System and the knowledge being gained to reduce HRE. We must look at and examine the successes and the failures of our methodologies, processes, culture and perspectives and continue to seek behaviors and practices that make our job safer. When we focus our attention on Building Construction, Command Risk Management and Firefighter Safety and the essence of combat structural fires; Structural firefighting is what it’s all about, is it not? The fundamental nature and reason we have such veneration for firefighting and the fire service and all it entails, has a lot to do with going into burning buildings and fighting fire. But firefighting has its adverse consequences, with all too familiar costs, in the form of injuries, debilitating accidents and line of duty deaths. As a firefighter; to say that we love firefighting would be an understatement, BUT one issue that we need to address is the fact that there are many individual firefighters, companies and organizations that employ fireground operational practices that promote the “enjoyment and entertainment” of working a good job within the occupancy compartment of a structural fire in the building environment.
One of the formulative postings I published this past year focused on working that good job for the shear enjoyment of what and who we are; firefighters. It’s worth repeating again, since this is an opportune time to reflect. Today’s incident scene and structural fires are unlike those in past decades and will continue to challenge us operationally when confronted with structural fire engagement and combat operations. Operationally, we need to be doing the right thing, for the right reason in the right place to increase our safety and incident survivability.
We also can share the belief and understanding that we at times may have found ourselves staying too long in the wrong place, operating tactically in an adverse environment with known hazards that do not have value, for nothing other than the enjoyment of nozzle and operating time in the fire. We have a tendency when working a room and contents, compartment fire or a structural fire in the building environment placing operating companies and personnel in high hazard environments- sometimes at the expense of justifying our own entertainment value in working the job, the assignment or in maintaining the interior operational interface. Think about it.
We need to stop “entertaining” ourselves. Don’t mistake determined, effective and proactive firefighting with that of reckless, baseless and risk-preferring and self-indulging firefighting. There is a difference. The job is dangerous, it has risks, we are not invincible, and we can die; at any alarm, in any fire, at anytime for any number of reasons. But it’s tragic when we die for all the wrong reasons. Think about the definitions; think about how they apply to you, your personnel, your company or your operations; past, present or future. More importantly, think about when and where you’ve found yourself doing any one of these; could the outcome have been different?
TACTICAL AMUSEMENT“tak-ti-kəl ə- myüz-mənt”
1: of or relating to structural fireground tactics: as a (1) a means of amusing or entertaining during fire suppression, support tasks or operations that places personnel at risk
2: the condition of being amused while engaging in fire suppression, support tasks or operations that places personnel at risk
3: pleasurable diversion while engaging in fire suppression, support tasks or operations: entertainment; that places personnel at risk
TACTICAL DIVERSION“tak-ti-kəl də- vər-zhən”
1: the reckless act or an instance of diverting from an assignment, task, operation or activity while engaging in fire suppression, support tasks or operation for the sake of amusing or entertainment; that places personnel at risk
2: the reckless act of self determined task operations that diverts or amuses from defined risk assessment and incident action plans; that places personnel at risk
1: to deliberately manage to get around especially by ingenuity or approach that diverts for the purpose of amusing; assignment, operations or tasks that countermand or disregard defined risk assessment and incident action plans; that places personnel at risk
The demands and requirements of modern firefighting will continue to require the placement of personnel within situations and buildings that carry risk, uncertainty and inherent danger. As a result, risk management must become fluid and integrate all personnel. We must manage dynamic risks with a balanced approach of effective assessment, analysis and probability within command decision making that results in safety conscious strategies and tactics.
On any given day, at any give alarm, the dynamics around us at times may be in or out of our direct control. We may not be able to see what the cards have in store for us, BUT we must ensure we use every fragment of training, fortitude, knowledge, skills, courage, bravery, insights, luck and sometimes (other divine) intervention to get us through. We must have the fortitude and courage to be both safety conscious and measured in the performance of our sworn duties while maintaining the appropriate balance of risk and bravery.
• The demands and requirements of modern firefighting will continue to require the placement of personnel within situations and buildings that carry risk, uncertainty and inherent danger.
• As a result, risk management must become fluid and integrate all personnel.
• We must manage dynamic risks with a balanced approach of effective assessment, analysis and probability within command decision making that results in safety conscious strategies and tactics.
• The traditional attitudes and beliefs of equating aggressive firefighting operations in all occupancy types coupled with correlating, established and pragmatic operational strategies and tactics MUST not only be questioned, they need to be adjusted and modified.
Risk assessment, risk-benefit analysis, safety and survivability profiling, operational value and firefighter injury and LODD reduction must be further institutionalized to become a recognized part of modern firefighting operations. Aggressive firefighting must be redefined and aligned to the built environment and associated with goal oriented tactical operations that are defined by risk assessed and analyzed tasks that are executed under battle plans that promote the best in safety practices and survivability within know hostile structural fire environments.
• Aggressive: Assertive, bold, and energetic, forceful, determined, confident, marked by driving forceful energy or initiative, marked by combative readiness, assured, direct, dominate…
There is a melting of both pragmatic aggressive firefighting with measured and deliberate tactical approaches. It’s a balance and equilibrium; the question is do you know when to recognize that balance, where it exists and how not to cross that adverse threshold?
Our current generation of buildings, construction and occupancies are not as predictable as past Conventional Construction; Risk assessment, strategies and tactics must change to address these new rules of structural fire engagement. You need to gain the knowledge and insights and to change and adjust your operating profile in order to safe guard your companies, personnel and team compositions.
Looking Forward through the Rear View Mirror; remember the past, recall those history repeating events that seem to manifest themselves time and time again; are we ever going to learn. I truly believe we are starting to finally “get it”-even if it’s on a smaller incremental scale, it’s a starting point. Remember the lessons from those events that have impacted you, your department, your community and the fire service; from close-calls to near-miss events; from minor or debilitating injuries to the tragedy and sorrow of a LODD event.
As we transition into a new year, and as plans begin to take place that frame and outline the year’s activities, foremost in this planning, preparation, scheduling and outlook should be those activities and commitments that training, education and skill development can be implemented and enhanced. Take the initiative to recognize and identify training and operational gaps and distinguish the risk and options available to lessen or eliminate the risk and reduce the gap deficiencies. Take the time to implement effective, accurate and frequent training and skill development drills, training curriculums and programs. Don’t sacrifice or forego on this mission critical area when so much is at stake in the domain of combat structural fire suppression. Understand the predictability of performance in the buildings and occupancies not only in your jurisdiction, first or second-due areas, but also in those areas that you may be called upon to respond to for greater alarms or mutual aid. Understand the structural anatomy of your community. Remember Building Knowledge = Firefighter Safety. Understand the fomulative issues affecting engineered structural systems (ESS) and the change in operational deployment and tactics on the fire ground. Keep an eye in the rear view mirror; learning from the wisdom and knowledge from where you’ve been, what you’ve done and all your past experiences and practice; but at the same time focusing on the road before you with keen attentiveness on situational awareness, anticipating error-likely conditions and balanced risk assessment and operational management in both your strategic and tactical deployments.
We don’t know what’s in the cards on any given day, but the citizens we protect can rest assured, we will do our jobs as firefighters, to the best of our abilities, because of who we are; today, in 2010 and certainly well into the next decade and beyond.
Ensure you’re glancing occasionally in your rear view mirror to monitor where you’ve been, while driving your initiatives, programs, processes and actions forward. Above all, maintain the courage to be safe.
Without understanding the building-occupancy relationships and integrating; construction, occupancies, fire dynamics and fire behavior, risk, analysis, the art and science of firefighting, safety conscious work environment concepts and effective and well-informed incident command management, company level supervision and task level competencies…You are derelict and negligent and "not "everyone may be going home".
Our current generation of buildings, construction and occupancies are not as predictable as past conventional construction; risk assessment, strategies and tactics must change to address these new rules of structural fire engagement. There is a need to gain the building construction knowledge and insights and to change and adjust operating profiles in order to safe guard companies, personnel and team compositions. It's all about understanding the building-occupancy relationships and the art and science of firefighting, Building Knowledge = Firefighter Safety (Bk=F2S)
The Newest radio show on FireFighter Netcast.com at Blogtalk Radio… Taking it to the Streets with Christopher Naum. On the Air Monthly on Firefighter Netcast.com. A Buildingsonfire.com Series and Firefighter Netcast.com Production. Advancing Firefighter Safety and Operational Integrity for the Fire Service through provocative insights and dynamic discussions dedicated to the Art and Science of Firefighting and the Traditions of the Fire Service.
