The Chief of the Department directed the Department Safety Officer to conduct a Safety Investigation of this incident. The primary purpose of the investigation was to identify and analyze the contributing factors that led to the incident as well as to create situational awareness to prevent future occurrences. The main objective of the Team’s investigation and subsequent report was to discover the key factor that led to the fatal outcome of two Firefighters. The SFFD report contains the findings and recommendations to help prevent Firefighter injuries or fatalities in the future.
In analyzing and recording these events, the Investigation Team acknowledges and respects that members confronted a challenging situation. On‐scene personnel reacted quickly to the changing conditions at this incident. We request that every person who reads this report show respect, appreciation and consideration for all personnel who responded to this incident.
As is a common industry practice, for this report Lieutenant Vincent Perez was referred to as Victim 1 and Firefighter Paramedic Anthony Valerio was referred to as Victim 2, with the exception of the Rescue Events Section.
Excerpt from Chief of Department’s Letter
“On Thursday, June 2, 2011 at 10:45 a.m., the San Francisco Fire Department responded to Box 8155, at 133 Berkeley Way. What was seemingly a routine working fire in a single family residence quickly transformed into a fierce and unrelenting incident with ultimately tragic results.
When we answered the call to a career in the Fire Service and took our Oath of Allegiance, we were aware of the inherent danger of our occupation. Despite this awareness, we do not expect to encounter a line of duty death of a brother or sister, especially not in our very own Department. The profound loss of Lieutenant Vincent Perez and Firefighter/Paramedic Anthony Valerio has left an indelible impression in our hearts and will forever be remembered in the annals of SFFD history.
Even as we mourned our fallen brothers in the early days after the tragedy, our Department began the painful and difficult, but necessary, steps of a Line of Duty Death investigation. We were resolute in understanding what occurred during those fateful minutes and compelled to uncover any recommendations for improvement that may arise to future operations so that their passing will not have been in vain. For over six months, the Investigative Team worked tirelessly, scrutinizing every piece of evidence in order to produce a comprehensive report.”
SFFD
Joanne Hayes‐White
Chief of Department
Executive Summary and Report Excerpt
On June 2, 2011 at 10:45 hours, the San Francisco Fire Department was dispatched to a report of a fire in the building at 133 Berkeley Way in the City’s Diamond Heights neighborhood. The first unit arriving on the scene, Engine 26, observed light smoke showing from the garage of the 4 story (2 above grade, 2 below grade) wood framed building, detached on the Bravo side.
Aerial from the Charlie Side
An aggressive interior fire attack was initiated through the front door, which is on a level between the ground level and second floor. After investigating the garage (ground level), Engine 24, the second Engine on the scene, led a small line through the garage to the interior door to back up the first Company. Battalion 9 was assigned Fire Attack by Battalion 6, who had assumed Command. Battalion 9 entered the fire building and, after conferring face to face with Engine 26 on the first floor (ground level), concluded that the fire was below them.
Alpha Side Operations
Battalion 9 exited the building and proceeded to the Bravo side to check for an entrance leading directly to the fire floor. Engine 11 led a large line wye to the driveway with the intention of leading a 1 ¾ inch line through the garage. They were redirected by Battalion 6 to make their lead down the Bravo side of the building to Sublevel 1 (one floor below grade) to assist Battalion 9. The Division Chief, upon arrival, assumed Command. He assigned Battalion 6 to Division 3 (ground floor).
Truck 15 was assigned Roof Division. Truck 11 split their crew, two members to the roof and three members to search and ventilate the top floor of the fire building. The Rescue Squad was ordered to conduct a search. Two members initially attempted to make entry through the garage but, due to extreme heat conditions, redeployed and entered through Sublevel 1 on the Bravo side.
The other two members of the Rescue Squad made entry through the front door, were pushed back by the heat and then made a successful second effort and conducted a search of the top floor.
In the course of fireground operations, members of several Companies came upon the stricken members on the first level and removed them from the building. All possible efforts were employed to revive the members and they were transported to San Francisco General Hospital (SFGH). One member (Victim 1) succumbed to his injuries that day and the second member (Victim 2) succumbed to his injuries two days later. Two other Firefighters were treated at SFGH for various injuries and released that day.
The Medical Examiner determined the cause of death for both members was due to complications from external and internal thermal injuries. Both victims suffered burns to 40% of their body surface. This fire was determined to be accidental by the SFFD Fire Investigative Unit. The fire originated on Sublevel 1, on the West side of the family room, near the large floor to ceiling windows. The ignition was a non‐specific electrical sequence in the electrical wiring or appliance (handheld vacuum cleaner) in this area.
There was a delay in reporting the fire due to the occupants’ attempting to extinguish it on their own. (SFFD Fire Investigation Report 11‐0500532)
The investigation identified that the failing of the window on Sublevel 1, located near the seat of the fire and directly across the stairwell leading to the ground floor, led to the extreme fire behavior which ultimately caused the death of two Firefighters. This fire was in a stage of deprived oxygen when the window failed, causing a rapid extreme high heat event to occur. The extreme heat followed the natural flow path up the interior stairs where Victims 1 and 2 were located.
The Safety Investigation Team found no conclusive evidence that the members were exposed to direct flame impingement during this rapid extreme heat event. However,
Victims 1 and 2 received varying degree of burns up to 40% of their body. The investigation concluded that this was caused by the rapid extreme heat conditions that radiated through their Personal Protective Equipment (PPE) to their bodies. These temperatures exceed the ability for human survival regardless of PPE.
The PPE was inspected and evaluated by NIOSH and the manufacturer. Both reviewing parties concluded that the PPE performed to its specifications and design. The manufacturer concluded that the PPE was exposed to temperatures in the range of 550‐ 700°F. These extreme temperatures were short in duration which caused limited damage to the outer shell of the PPE.
The Safety Investigation Team noticed severe heat damage to the portable radios remote speaker/microphones on Victims 1 and 2 and had the radios tested. The testing indicated that the remote speaker/microphones failed to operate correctly due to heat damage. The Safety Investigation Team was not able to determine, after testing, exactly when the remote speaker/microphones failed. The investigation has shown that multiple attempts were made to contact Engine 26 with no response.
The investigation also found that no radio transmissions of distress were received from Victims 1 or 2. Command and Control of any incident in the San Francisco Fire Department is acquired and maintained through the use of the Incident Command System (ICS).
The Incident Command System provides the tools for clear objectives, a single action plan, clear and acknowledged communications, and accountability for all members assigned to an incident. At this incident, some of the components of Incident Command System that were not followed include:
Single action plan
Fireground Accountability
From these findings, this report makes recommendations for several areas of the Department, including:
Training
Equipment
Policy Development
Policy Enforcement
The Safety Investigation Team gathered and analyzed many facts and conducted interviews of members directly involved in this incident. The Team identified several factors that occurred that contributed to the deaths at this incident.
These factors include:
Extreme heat conditions accelerated by the failure of a window on the fire floor.
Layout of building
Excessive live fuel load which contributed to the growth of the fire
Conclusion
This incident appeared from the onset to be a routine “room and contents” fire that the SFFD encounters on a regular basis. As the Companies were performing standard fireground operations, the incident rapidly deteriorated due to a hostile fire event. The failure of a window in the fire room allowed fresh oxygen to enter the room, providing a fire that was deprived of one of the key elements of combustion to rapidly intensify.
Due to the growth of the fire, the room flashed, causing extreme and rapid heat conditions which traveled up the interior stairs (the flow path) to the location which our members were operating. Our members were caught in this high heat, causing the injuries that ultimately claimed their lives.
Due to this fire event, other Companies attempting to conduct fireground support operations were prevented from making entry into the structure from street level (through garage) to back up Engine 26. These Companies were forced to regroup and find an alternate point of entry. In the process of doing so, crews made entry from the Bravo side directly into the fire room and extinguished the fire. This allowed members to make entry from above which led to the discovery and rescue of our members.
These events happened in a time frame of less than fourteen minutes.
During the course of this investigation, the Safety Investigation Team recognized that no matter how experienced or properly prepared we are, we must always approach all incidents with the utmost awareness.
This incident showed that a simple failure of a piece of glass/window caused unforeseeable and fatal consequences.
We, as a Department, need to gain further knowledge and understanding of the following:
Having Situational Awareness prior to taking action, this would include the ongoing process when conditions change
How Risk Management must be used when making all decisions
Limitations of the PPE (turnouts, SCBA, and equipment)
Building construction, including layout and how fire/smoke will
move within the structure
Ventilation practices and how they affect fire conditions
Importance of Communications for all members operating on the scene
Companies must use strict discipline when assigned task/locations
PreviousCommandSafety Coverage from 2011, HERE, HERE and HERE
The mission of the Fire Department is to protect the lives and property of the people of San Francisco from fires, natural disasters, and hazardous materials incidents; to save lives by providing emergency medical services; to prevent fires through prevention and education programs; and to provide a work environment that values health, wellness and cultural diversity and is free of harassment and discrimination.
Knowledge and proficiencies related to building construction are formulative to all strategic, tactical and task level assignments.
Without understanding the building-occupancy relationships and integrating; construction, the compartment, occupancy risk, fire dynamics and fire behavior, fluid situational awareness and risk analysis, the art and science of aggressive and smart firefighting with well-informed incident command management, company level supervision and task level competencies; You are derelict and negligent and “not “everyone may be going home”.
What do you think? Where do you fit in?
New Strategic Thinking for Today’s Evolving Fireground and Challenges…..
In this week's issue of the National Fire Fighter's Near-Miss ReportingSystem's Report of the Week (ROTW) an informative focus was provided on near-miss reports related to ceiling collapse. We're posting the ROTW alert in it's entirety below and are expanding upon this discussion to include materials previously posted on Buildingsonfire.com from the posts that surrounded the LAFD LODD of Firefighter Glenn L. Allen who was killed in the line of duty as a result of being trapped beneath rubble when the roof and ceiling collapsed during a blaze at a 12,000-square-foot mansion in the Hollywood Hills on Feb. 17, 2011. (HERE and HERE)
Included in that reporting was expanded information on gypsum wall board ceiling systems. If you don't know about the National Fire Fighter's Near-Miss Reporting System and the Report of the Week (ROTW) follow these links HERE , HERE and HERE. More importantly, get involved and post some of your current OR past near-miss experiences and close calls, so the fire service can learn and everyone can go home. www.firefighternearmiss.com. Check out the extensive resources and materials avaiable on the site to support your training and operational needs.
The collapse of a ceiling is one of the more disorienting situations a firefighter can face. Sixty near-miss reports are returned when the keyword "ceiling collapse" is typed into the text box on www.firefighternearmiss.com. Each of these accounts provides lessons on the value of heightened situational awareness, correct use of PPE, rigorous training, and recognizing the effect of fire on building materials. The National Fire Fighter's Near-Miss Reporting System'ss Report of the Week (ROTW) featured report this week, 11-025, recounts one example.
"Our station was dispatched for a residential structure fire and we responded with two engines and four on-duty personnel… The near-miss happened about 30 minutes into the fire and there were two hoselines in place. One hoseline was on the second floor and one hoseline was on the first floor. Most of the fire was extinguished and overhaul was in progress. There were three members of my crew pulling ceiling to reach hot spots. The lieutenant stated to be careful because the floor above was moving when pulling down on overhead material. The firefighter and the lieutenant continued to pull down the ceiling. This is when the second floor collapsed down into the first floor and the room that we were in…"
The overhead world of a fire scene is fraught with hazards. Many of the hazards we can dispassionately discuss at the kitchen table, but seem to overlook when we are engaged in firefighting. Electrical wiring, telecommunication cables, structural support systems and storage are all elements hidden behind the drywall. Whether you are looking up at a ceiling that covers an attic or an upper floor, shoving your hook through the drywall is usually a benign act that simply pulls down a section of sheetrock to expose the hidden area above. However, it can also be a catastrophic act that brings down an entrapment hazard that has you fighting for survival.
Once you have read the entire account of 11-025, and the related reports, consider the following:
Before ceiling pulling begins, is there an assessment of the structural stability and review of what might be behind the drywall before the first piece is removed?
Do you and your crews observe best practices when pulling ceilings (i.e., starting at the doorway and working into the room, noting the location of structural members through visual notation of nails, "shadowing" or "ghosting" of studs, etc.) before pulling ceilings?
Do you consider limiting the number of personnel in a room when ceilings and walls are being pulled?
Who is responsible for ensuring utilities have been controlled before pulling ceilings and walls? How is utility control documented and confirmed before ceiling pulling begins?
What is the likelihood that the space above the ceiling you are pulling is being used for storage? If storage is noted, can you determine what effect pulling down the ceiling will have on the structural members resisting the weight of the storage?
Overhaul activities occur during a transitional time in the firefighting process. The adrenaline and effort of the fire attack begins to fade, but there is still enough pent up energy that some members of the crews are propelled from one action to another without an assessment of conditions. The thinking officer and crew make periodic assessments, or benchmarks, to ensure the incident reality still matches the company's perception.
Have you escaped a ceiling collapse due to exceptional vigilance? Have you ever gotten caught in a ceiling collapse? Submit your report to www.firefighternearmiss.com today so everyone goes home tomorrow.
Note: The questions posed above from the NFFNMRS-ROTW by the reviewers are designed to generate discussion and thought in the name of promoting firefighter safety. They are not intended to pass judgment on the actions and performance of individuals in the reports.
The recent events in Los Angeles and the line of duty death of veteran LAFD Firefighter Glenn Allen who died Friday from injuries he sustained when a ceiling collapsed on him in a house fire late Wednesday night in the Hollywood Hills again gives us pause to reflect on the demands and hazards present at all fire suppression operations in buildings on fire. The past two months have borne consist reports of floor, roof, wall and ceiling collapses leading to firefighter injuries and line of duty deaths.
Incident event coverage from this past week HERE, HERE and HERE
The importance of maintaining heightened situational awareness, identifying and monitoring suspected or inherent building construction hazards coupled with inherent occupancy risk factors, and aligning those with strategic objectives, incident actions plans and tactical deployment operations. Building Knowledge equating to firefighter safety is still a driving principle that is formulative to all firefighting operations in buildings, occupancies and structures. Let’s take this opportunity to gain some insights into the material that compromises nearly all wall and ceiling membrane systems and assemblies in nearly all buildings, occupancies and structures; that is gypsum board components.
I’ve included a number of video clips that center on our discussion, as the videos center on the operation parameters at this extremely large (floor area/square footage) residential occupancy. Most clips have good coverage of the structure and firefighting efforts. Take a few moments to review these clips before you proceed;
Gypsum board is the generic name for a family of panel-type products consisting of a noncombustible core, primarily of gypsum, with a paper surfacing on the face, back, and long edges.
In 1888, Augustine Sackett used plaster of Paris sandwiched between several layers of paper to produce what would eventually become "Sackett Board," the original gypsum board. By the 1950s, many innovations in gypsum board technology had been developed, including the listing of many fire-resistance rated designs, rounded edges, specialized nails, curved partitions, studless partitions, sound control systems, lightweight gypsum lath, plaster, and gypsum board systems that fueled a boom period for the use of gypsum products in both the residential and commercial construction industries.
By 1955, an estimated 50 percent of new homes were built using gypsum wallboard. Lightweight gypsum board systems permitted the use of lightweight steel in steel framed buildings, which enabled the widespread growth of high-rise residential and commercial construction during the 1960s and 1970s.
Today gypsum board, along with a variety of other gypsum panel products, continues to serve as a preferred building material in both residential and commercial construction for interior walls and ceilings, exterior sheathing, fire-resistant partitions and membranes, and liner material for elevator shafts and stairwells. These properties make gypsum board well suited for building and space types requiring cost-effectiveness as well as fire resistiveness and maintainability.
Gypsum board is often called drywall, wallboard, or plasterboard and differs from products such as plywood, hardboard, and fiberboard, because of its noncombustible core. It is designed to provide a monolithic surface when joints and fastener heads are covered with a joint treatment system.
Gypsum is a mineral found in sedimentary rock formations in a crystalline form known as calcium sulfate dehydrate. One hundred pounds of gypsum rock contains approximately 21 pounds (or 10 quarts) of chemically combined water. Gypsum rock is mined or quarried and then crushed. The crushed rock is then ground into a fine powder and heated to about 350 degrees F, driving off three fourths of the chemically combined water in a process called calcining. The calcined gypsum (or hemihydrate) is then used as the base for gypsum plaster, gypsum board and other gypsum products.
To produce gypsum board, the calcined gypsum is mixed with water and additives to form a slurry which is fed between continuous layers of paper on a board machine. As the board moves down a conveyer line, the calcium sulfate recrystallizes or rehydrates, reverting to its original rock state. The paper becomes chemically and mechanically bonded to the core. The board is then cut to length and conveyed through dryers to remove any free moisture.
Gypsum manufacturers also rely increasingly on “synthetic” gypsum as an effective alternative to natural gypsum ore. Synthetic gypsum is a byproduct primarily from the desulfurization of the flue gases in fossil-fueled power plants. Gypsum board is an excellent fire resistive material. It is the most commonly used interior finish where fire resistance classifications are required. Its noncombustible core contains chemically combined water which, under high heat, is slowly released as steam, effectively retarding heat transfer. Even after complete calcination, when all the water has been released, it continues to act as a heat insulating barrier. In addition, tests conducted in accordance with ASTM E 84 show that gypsum board has a low flame spread index and smoke density index. When installed in combination with other materials it serves to effectively protect building elements from fire for prescribed time periods.
Developed through modern technology as a result of specific requirements, gypsum board is mainly used as the surface layer of interior walls and ceilings; as a base for ceramic, plastic, and metal tile; for exterior soffits; for elevator and other shaft enclosures; as area separation walls between occupancies; and to provide fire protection to structural elements. Most gypsum board is available with aluminum foil backing which provides an effective vapor retarder for exterior walls when applied with the foil surface against the framing.
Standard size gypsum boards are 4ft. wide and 8, 10, 12, or 14 ft. long. The width is compatible with the standard framing of studs or joists spaced 16 in. and 24 in. on center. Some thicknesses and types of gypsum board are also produced as a standard 54 in. width material. Other lengths and widths are available as special order materials.
Depending on thickness and type of gypsum board, the weight can vary from 2 – 4 lbs./ per square foot
A typical 4 ft. x 8 ft. sheet of 5/8-in gypsum board can weigh 96 lbs.
A 4ft. x 12ft. sheet can weigh upwards of 150 lbs.
In large span designs with attachments varying from 16 inches on center to 24 inches on center with z-strips or resilient channels attached to the structural members; these ceiling panels and assemblies can fail and collapse in a monolithic manner creating a significant safety concern to operating companies below.
As an example a 12ft x 12ft. monolithic assembly collapse ( single layer-gypsum board only) could have a collapse weight of 500 lbs.
Add the weight of compromised and attached structural members components, fixtures and insulation and the absorption of added water into the gypsum board from hose streams the combined weight of the collapse area may increase to 800-1000 lbs. Increase the size of the collapse area and the weight impacting operating companies is significant.
The various thicknesses of gypsum board available in regular, type X, improved type X and pre-decorated board are as follows:
¼-in. A low cost gypsum board used as a base in a multi-layer application for improving sound control, or to cover existing walls and ceilings in remodeling.
5/16-in. A gypsum board used in manufactured housing.
3/8-in. A gypsum board principally applied in a double-layer system over wood framing and as a face layer in repair or remodeling.
½-in. Generally used as a single-layer wall and ceiling material in residential work and in double-layer systems for greater sound and fire ratings.
5/8-in. Used in quality single-layer and double-layer wall systems. The greater thickness provides additional fire resistance, higher rigidity, and better impact resistance.
¾-in. Used in a similar manner to 5/8-in.
1 in. Used in interior partitions, shaft walls, stairwells, chaseways, area separation walls and corridor ceilings. Manufactured only in 24 in. wide panels and usually installed as an integral part of a system.
Depending on the type and the use, gypsum board is manufactured with a tapered, square, beveled, rounded, or tongue and groove edge. Some gypsum board types may incorporate a combination of different edge types. The fire resistance of gypsum board can be described using three distinct terms: regular core, type ‘X’ core and improved type ‘X’ core.
Regular core gypsum board is made of a noncombustible core material composed mainly of gypsum. Although it does not have the specially enhanced fire-resistive properties of type ‘X’, regular core gypsum board affords a degree of natural fire resistance.
In the 1940s different gypsum board formulations were investigated to increase the naturally occurring fire resistance of regular core gypsum board. A new product was eventually introduced that clearly demonstrated “eXtra” fire resistance, hence the name “type X.” The basic components of type ‘X’ that give it a superior fire resistance are gypsum, glass fibers, and vermiculite.
In the 1960s, further modifications were made to the original successful type ‘X’ formulations of gypsum board used in some systems – particularly ceiling systems – without compromising the fire-resistive qualities. The new product demonstrates additional fire resistance over type ‘X’ core, and thus the term “improved type X” was coined. Gypsum board products make up the predominant portion of a family of materials identified as gypsum panel products. Gypsum panel products are defined as sheet materials consisting essentially of gypsum. They can be faced with paper or another material, or may be unfaced. Gypsum board, glass-faced sheathing materials with a gypsum core and unfaced gypsum-based products are all considered to be gypsum panel products. Technically, gypsum board is defined as the generic name for a family of sheet products consisting of a noncombustible core, primarily of gypsum, with a paper surfacing on the face, back, and long edges. In recent years the family of gypsum-based panel materials has grown to include panel products other than those with the familiar paper facers. A number of specialized gypsum panel products and gypsum boards have been developed for specific uses which include:
Gypsum Wallboard for interior walls and ceilings
Gypsum Ceiling Board for interior ceilings
Type X Gypsum Board for fire-resistance-rated building systems
Fiber Reinforced Gypsum Panels for interior and exterior walls, ceilings, and tile base
Gypsum Sheathing for exterior walls and roof systems
Glass Mat Gypsum Substrate for use as sheathing on exterior walls and ceilings
Gypsum Soffit Board for use on exterior soffits and ceilings
Water-Resistant Gypsum Backing Board for use as a tile base
Glass Mat Water-Resistant Gypsum Backing Board for use as a tile base
Gypsum Backing Board for use as a base for multi-ply systems
Gypsum Lath for use as a base for gypsum plaster
Gypsum Plaster Base for use as a base for veneer plaster
Gypsum Shaft Liner Board for shaft, stairway, and duct enclosures
Pre-decorated Gypsum Board for accent walls, office and movable partitions
Foil backed gypsum board for use as a vapor retardent
Identified by their technically correct names, gypsum board products are as follows:Gypsum Wallboard is produced primarily for use as an interior surfacing for buildings. It is the most often used commodity gypsum board and annually accounts for over 50 percent of all the gypsum board manufactured and sold in North America. Gypsum wallboard has a manila-colored face paper and is manufactured in a variety of thicknesses as both a regular- and a fire-resistant core material.
Gypsum Ceiling Board is an interior surfacing material with the same physical appearance as gypsum wallboard. Gypsum ceiling board is manufactured as a ½-inch thick material; it is designed for application on interior ceilings, primarily those intended to receive a water-based texture finish. It has a sag resistance equal to 5/8-inch thick gypsum wallboard.
Predecorated Gypsum Board has a decorative surface which does not require further treatment. The surfaces may be coated or painted, printed, textured, or have a film – such as vinyl wallcovering – applied. It is manufactured in a variety of thicknesses as both a regular- and a fire-resistant core material.
Water-resistant Gypsum Board is a gypsum board designed for use on walls primarily as a base for the application of ceramic or plastic tile. It is readily identified by its green-tinted face paper and is commonly referred to as “Greenboard.” It has a water-resistant core and a water-repellent face and back paper; it is generally installed in bath, kitchen, and laundry areas.
Gypsum Backing Board, Gypsum Coreboard, and Gypsum Shaftliner Panel are all designed to be used as base materials in multi-layer, solid and semi-solid, and shaftwall systems. Gypsum backing board is used as a base layer for other gypsum board materials in systems or as a base for dry claddings such as acoustic tile. Gypsum coreboard and gypsum shaftliner are manufactured with a type X core, using a specific edge configuration to facilitate installation into specialized stud systems and a type X core.
Exterior Gypsum Soffit Board is designed for use on the underside of eaves, canopies, carports, soffits, and other horizontal exterior surfaces that are indirectly exposed to the weather. It has water-repellent face and back paper and is more sag-resistant than regular wallboard. Exterior gypsum soffit board can be manufactured with a type X core and typically has a light brown face paper.
Gypsum Sheathing Board is used as a backing under exterior siding or cladding. It has a water-repellent face and back paper and can be manufactured with a water-resistant core. Depending on the thickness of the board, gypsum sheathing board is manufactured with either a square or a tongue-and-groove edge and a fire-resistive core. It generally has a brown or light black face paper.
Gypsum Base for Veneer Plaster has a distinctive blue-tinted face paper that is treated to facilitate the adhesion of thin coats of hard, high strength gypsum veneer plaster. It is produced in sheets that are the same width as gypsum wallboard and can be manufactured with a fire-resistive core. Application of Gypsum Board
A wide variety of gypsum board application methods are available to meet virtually any need in building design and construction. Gypsum board is applied in either single-layer or multi-layer systems to achieve specific fire or sound ratings. Gypsum board is applied over wood or steel framing or furring. It is also applied to masonry or concrete surfaces, either laminated directly or attached to wood furring strips or steel furring channels. Gypsum board ceilings can be directly attached to joists or trusses or attached to furring or grid systems suspended below structural members. Gypsum board is generally attached to the framing with nails, screws, or staples. Although nails are commonly used in wood frame construction, screws are often preferred because they are applied with automatic screw guns, have excellent holding power, and reduce the possibility of nail pops. A combination of nails and screws may also be used, with nails along edges and screws in the field. Staples are used because they are economical and can be quickly applied with staple guns; however, the use of staples should be limited to the base-layer in multi-layer systems or to gypsum sheathing on wood framing. Gypsum board wall and ceiling surfaces are typically decorated with paint, texture, wallpaper, tile, or paneling. When pre-decorated gypsum board is used, joints are generally covered with matching molding or battens; no additional finishing or decoration is necessary. Single-Layer Application
Single-layer gypsum board applications are the most common in light commercial and in residential construction.
These systems rely on one layer of gypsum board attached to framing or furring.
Although single-layer gypsum board systems are generally adequate to meet most minimum requirements for fire resistance and sound control, multi-layer systems are preferred for higher quality construction and to upgrade beyond the "bare minimums" of many code requirements.
Multi-Layer Application
Multi-layer systems have two or more layers of gypsum board and are used to meet higher sound and fire resistance requirements or to enhance these comfort and safety qualities beyond minimum code requirements.
They also provide better surface quality because face layers can often be laminated over base layers eliminating many or all of the fasteners in the face layer. In addition, face-layer joints are stronger by virtue of the continuous backing provided by the base layers.
Nail pops and ridging are less frequent and imperfectly aligned framing has less effect on the quality of the finished surface.
GYPSUM BOARD TYPICAL MECHANICAL AND PHYSICAL PROPERTIES (GA-235-10) A common misconception is that there are just two basic types of drywall—regular and type X—and beyond this difference, drywall products from various manufacturers are about the same. However, laboratory fire tests by United States Gypsum Company and various independent testing organizations provide strong evidence that there are significant fire-performance differences between drywall products from various manufacturers. It is well known in the construction industry that the single most important characteristic of gypsum drywall is its fire resistance. This is provided by the principal raw material used in its manufacture, CaSO4- 2H2O (gypsum). As the chemical formula shows, gypsum contains chemically combined water (about 50% by volume). When gypsum drywall panels are exposed to fire, the heat converts a portion of the combined water to steam. The heat energy that converts water to steam is thus used up, keeping the opposite side of the gypsum panel cool as long as there is water left in the gypsum, or until the gypsum panel is breached.
In the case of regular gypsum panels, as the water is driven off by heat, the reduction in volume within the gypsum causes large cracks to form, eventually causing the panel to fail.
In a special fire test designed to demonstrate the relative performance of different types of gypsum cores (described later in this section), it was shown that in a fire with a temperature of 1,850ºF, a 5/8" thickness of regular-core gypsum panels would fail in this manner in 10 to 15 minutes.
Type X gypsum panels, such as Sheetrock brand Firecode gypsum panels, have glass fibers mixed with the gypsum to reinforce the core of the panels.
These fibers have the effect of reducing the extent of and size of the cracks that form as the water is driven off, thereby extending the length of time the gypsum panel can resist the heat without failure.
Fire test results indicate that the same thickness of the type X gypsum drywall exposed to the same temperature (1,850ºF) will last 45 to 60 minutes.
USG has developed a third-generation gypsum drywall product called Sheetrock brand Firecode C gypsum panels that provides even greater resistance to the heat of fire. The core of Firecode C contains more glass fibers than type X—but also a shrinkage-compensating additive, a form of vermiculite that expands in the presence of heat at about the same rate as the gypsum in the core shrinks (from loss of water). Thus the core becomes highly stable in the presence of fire and remains intact even after the combined water is driven off. Tests have shown that this third-generation product resisted the fire for more than two hours, as compared to 45 to 60 minutes for the type X, and 10 to 15minutes for the regular panel under the same test conditions.
In a future posting we’ll discuss the issues facing the fire service related to the newest generation of impact resistant gypsum board that will restrict or preclude entirely our ability to breach walls in residential or commercial occupancies. Here are some links and Spec Sheets to look at in advance, HERE , HERE, HERE and HERE
References and Links Summarizing the many different types of gypsum board used in the industry, this quick reference gives typical uses of, and the ASTM and CSA standards for, each type. Also included is the appropriate industry standard designation for the installation of each type of gypsum board, along with the sizes and thicknesses generally available. Download
APPLICATION OF GYPSUM SHEATHING (GA-253-07)
This publication describes the industry's latest recommendations for handling, storing, and installing gypsum sheathing under a variety of conditions. A must for anyone hanging gypsum sheathing or involved in EIFS work. Download
FIRE-RESISTANT GYPSUM SHEATHING (GA-254-07)
This publication describes the advantages, recommended uses, limitations, and properties of gypsum sheathing in exterior walls.
Reference guide of construction procedures for gypsum drywall, cement board, veneer plaster and conventional plaster.
Trade Associations and other Organizations
Association of the Wall and Ceiling Industry (AWCI)—Provides services and undertake activities that enhance the members' ability to operate a successful business. AWCI represents acoustics systems, ceiling systems, drywall systems, exterior insulation and finishing systems, fireproofing, flooring systems, insulation, and stucco contractors, suppliers and manufacturers, and allied trades.
ASTM International (ASTM)—Provides a global forum for the development and publication of voluntary consensus standards for materials, products, systems, and services. In over 130 varied industry areas, ASTM standards serve as the basis for manufacturing, procurement, and regulatory activities. Provides standards that are accepted and used in research and development, product testing, quality systems, and commercial transactions around the globe.
Ceilings and Interior Systems Construction Association (CISCA)—Association for the advancement interior commercial construction, providing education, technical guidance and related resources. CISCA membership includes over 600 of the leading contractors, distributors, manufacturers and independent manufacturer's representatives worldwide.
Gypsum Association (GA)—Founded in 1930, GA promotes the use of gypsum while advancing the development, growth, and general welfare of the gypsum industry in the United States and Canada on behalf of its member companies.
ICC Evaluation Service (ICC-ES)—Provides technical evaluations of building products, components, methods, and materials and issues reports on code compliance to building regulators, contractors, specifiers, architects, engineers, and the public.
Relevant Codes and Standards
Guide Specifications
Department of Defense (DoD) Unified Facilities Guide Specifications (UFGS)
The recent events in Los Angeles and the line of duty death of veteran LAFD Firefighter Glenn Allen who died Friday from injuries he sustained when a ceiling collapsed on him in a house fire late Wednesday night in the Hollywood Hills again gives us pause to reflect on the demands and hazards present at all fire suppression operations in buildings on fire. The past two months have borne consist reports of floor, roof, wall and ceiling collapses leading to firefighter injuries and line of duty deaths.
Incident event coverage from this past week HERE, HERE and HERE
The importance of maintaining heightened situational awareness, identifying and monitoring suspected or inherent building construction hazards coupled with inherent occupancy risk factors, and aligning those with strategic objectives, incident actions plans and tactical deployment operations. Building Knowledge equating to firefighter safety is still a driving principle that is formulative to all firefighting operations in buildings, occupancies and structures. Let’s take this opportunity to gain some insights into the material that compromises nearly all wall and ceiling membrane systems and assemblies in nearly all buildings, occupancies and structures; that is gypsum board components. I’ve included a number of video clips that center on our discussion, as the videos center on the operation parameters at this extremely large (floor area/square footage) residential occupancy. Most clips have good coverage of the structure and firefighting efforts. Take a few moments to review these clips before you proceed;
Aeria Overview of the massive residential structure Ventilation Cuts in the Roof Assembly
Helicopter View of the Collapse Area from the Exterior
Fire ground Roof Ventilation Operations and extension
Interior Operations Pre-collapse
Handlines being stretched into the interior
Post Collapse Interior
Gypsum board is the generic name for a family of panel-type products consisting of a noncombustible core, primarily of gypsum, with a paper surfacing on the face, back, and long edges.
In 1888, Augustine Sackett used plaster of Paris sandwiched between several layers of paper to produce what would eventually become “Sackett Board,” the original gypsum board. By the 1950s, many innovations in gypsum board technology had been developed, including the listing of many fire-resistance rated designs, rounded edges, specialized nails, curved partitions, studless partitions, sound control systems, lightweight gypsum lath, plaster, and gypsum board systems that fueled a boom period for the use of gypsum products in both the residential and commercial construction industries.
By 1955, an estimated 50 percent of new homes were built using gypsum wallboard. Lightweight gypsum board systems permitted the use of lightweight steel in steel framed buildings, which enabled the widespread growth of high-rise residential and commercial construction during the 1960s and 1970s.
Today gypsum board, along with a variety of other gypsum panel products, continues to serve as a preferred building material in both residential and commercial construction for interior walls and ceilings, exterior sheathing, fire-resistant partitions and membranes, and liner material for elevator shafts and stairwells. These properties make gypsum board well suited for building and space types requiring cost-effectiveness as well as fire resistiveness and maintainability.
Gypsum board is often called drywall, wallboard, or plasterboard and differs from products such as plywood, hardboard, and fiberboard, because of its noncombustible core. It is designed to provide a monolithic surface when joints and fastener heads are covered with a joint treatment system.
Gypsum is a mineral found in sedimentary rock formations in a crystalline form known as calcium sulfate dehydrate. One hundred pounds of gypsum rock contains approximately 21 pounds (or 10 quarts) of chemically combined water. Gypsum rock is mined or quarried and then crushed. The crushed rock is then ground into a fine powder and heated to about 350 degrees F, driving off three fourths of the chemically combined water in a process called calcining. The calcined gypsum (or hemihydrate) is then used as the base for gypsum plaster, gypsum board and other gypsum products.
To produce gypsum board, the calcined gypsum is mixed with water and additives to form a slurry which is fed between continuous layers of paper on a board machine. As the board moves down a conveyer line, the calcium sulfate recrystallizes or rehydrates, reverting to its original rock state. The paper becomes chemically and mechanically bonded to the core. The board is then cut to length and conveyed through dryers to remove any free moisture.
Gypsum manufacturers also rely increasingly on “synthetic” gypsum as an effective alternative to natural gypsum ore. Synthetic gypsum is a byproduct primarily from the desulfurization of the flue gases in fossil-fueled power plants. Gypsum board is an excellent fire resistive material. It is the most commonly used interior finish where fire resistance classifications are required. Its noncombustible core contains chemically combined water which, under high heat, is slowly released as steam, effectively retarding heat transfer. Even after complete calcination, when all the water has been released, it continues to act as a heat insulating barrier. In addition, tests conducted in accordance with ASTM E 84 show that gypsum board has a low flame spread index and smoke density index. When installed in combination with other materials it serves to effectively protect building elements from fire for prescribed time periods.
Developed through modern technology as a result of specific requirements, gypsum board is mainly used as the surface layer of interior walls and ceilings; as a base for ceramic, plastic, and metal tile; for exterior soffits; for elevator and other shaft enclosures; as area separation walls between occupancies; and to provide fire protection to structural elements. Most gypsum board is available with aluminum foil backing which provides an effective vapor retarder for exterior walls when applied with the foil surface against the framing.
Standard size gypsum boards are 4ft. wide and 8, 10, 12, or 14 ft. long. The width is compatible with the standard framing of studs or joists spaced 16 in. and 24 in. on center. Some thicknesses and types of gypsum board are also produced as a standard 54 in. width material. Other lengths and widths are available as special order materials.
Depending on thickness and type of gypsum board, the weight can vary from 2 – 4 lbs./ per square foot
A typical 4 ft. x 8 ft. sheet of 5/8-in gypsum board can weigh 96 lbs.
A 4ft. x 12ft. sheet can weigh upwards of 150 lbs.
In large span designs with attachments varying from 16 inches on center to 24 inches on center with z-strips or resilient channels attached to the structural members; these ceiling panels and assemblies can fail and collapse in a monolithic manner creating a significant safety concern to operating companies below.
As an example a 12ft x 12ft. monolithic assembly collapse ( single layer-gypsum board only) could have a collapse weight of 500 lbs.
Add the weight of compromised and attached structural members components, fixtures and insulation and the absorption of added water into the gypsum board from hose streams the combined weight of the collapse area may increase to 800-1000 lbs. Increase the size of the collapse area and the weight impacting operating companies is significant.
The various thicknesses of gypsum board available in regular, type X, improved type X and pre-decorated board are as follows:
¼-in. A low cost gypsum board used as a base in a multi-layer application for improving sound control, or to cover existing walls and ceilings in remodeling.
5/16-in. A gypsum board used in manufactured housing.
3/8-in. A gypsum board principally applied in a double-layer system over wood framing and as a face layer in repair or remodeling.
½-in. Generally used as a single-layer wall and ceiling material in residential work and in double-layer systems for greater sound and fire ratings.
5/8-in. Used in quality single-layer and double-layer wall systems. The greater thickness provides additional fire resistance, higher rigidity, and better impact resistance.
¾-in. Used in a similar manner to 5/8-in.
1 in. Used in interior partitions, shaft walls, stairwells, chaseways, area separation walls and corridor ceilings. Manufactured only in 24 in. wide panels and usually installed as an integral part of a system.
Depending on the type and the use, gypsum board is manufactured with a tapered, square, beveled, rounded, or tongue and groove edge. Some gypsum board types may incorporate a combination of different edge types. The fire resistance of gypsum board can be described using three distinct terms: regular core, type ‘X’ core and improved type ‘X’ core.
Regular core gypsum board is made of a noncombustible core material composed mainly of gypsum. Although it does not have the specially enhanced fire-resistive properties of type ‘X’, regular core gypsum board affords a degree of natural fire resistance.
In the 1940s different gypsum board formulations were investigated to increase the naturally occurring fire resistance of regular core gypsum board. A new product was eventually introduced that clearly demonstrated “eXtra” fire resistance, hence the name “type X.” The basic components of type ‘X’ that give it a superior fire resistance are gypsum, glass fibers, and vermiculite.
In the 1960s, further modifications were made to the original successful type ‘X’ formulations of gypsum board used in some systems – particularly ceiling systems – without compromising the fire-resistive qualities. The new product demonstrates additional fire resistance over type ‘X’ core, and thus the term “improved type X” was coined. Gypsum board products make up the predominant portion of a family of materials identified as gypsum panel products. Gypsum panel products are defined as sheet materials consisting essentially of gypsum. They can be faced with paper or another material, or may be unfaced. Gypsum board, glass-faced sheathing materials with a gypsum core and unfaced gypsum-based products are all considered to be gypsum panel products. Technically, gypsum board is defined as the generic name for a family of sheet products consisting of a noncombustible core, primarily of gypsum, with a paper surfacing on the face, back, and long edges. In recent years the family of gypsum-based panel materials has grown to include panel products other than those with the familiar paper facers. A number of specialized gypsum panel products and gypsum boards have been developed for specific uses which include:
Gypsum Wallboard for interior walls and ceilings
Gypsum Ceiling Board for interior ceilings
Type X Gypsum Board for fire-resistance-rated building systems
Fiber Reinforced Gypsum Panels for interior and exterior walls, ceilings, and tile base
Gypsum Sheathing for exterior walls and roof systems
Glass Mat Gypsum Substrate for use as sheathing on exterior walls and ceilings
Gypsum Soffit Board for use on exterior soffits and ceilings
Water-Resistant Gypsum Backing Board for use as a tile base
Glass Mat Water-Resistant Gypsum Backing Board for use as a tile base
Gypsum Backing Board for use as a base for multi-ply systems
Gypsum Lath for use as a base for gypsum plaster
Gypsum Plaster Base for use as a base for veneer plaster
Gypsum Shaft Liner Board for shaft, stairway, and duct enclosures
Pre-decorated Gypsum Board for accent walls, office and movable partitions
Foil backed gypsum board for use as a vapor retardent
Identified by their technically correct names, gypsum board products are as follows:Gypsum Wallboard is produced primarily for use as an interior surfacing for buildings. It is the most often used commodity gypsum board and annually accounts for over 50 percent of all the gypsum board manufactured and sold in North America. Gypsum wallboard has a manila-colored face paper and is manufactured in a variety of thicknesses as both a regular- and a fire-resistant core material.
Gypsum Ceiling Board is an interior surfacing material with the same physical appearance as gypsum wallboard. Gypsum ceiling board is manufactured as a ½-inch thick material; it is designed for application on interior ceilings, primarily those intended to receive a water-based texture finish. It has a sag resistance equal to 5/8-inch thick gypsum wallboard.
Predecorated Gypsum Board has a decorative surface which does not require further treatment. The surfaces may be coated or painted, printed, textured, or have a film – such as vinyl wallcovering – applied. It is manufactured in a variety of thicknesses as both a regular- and a fire-resistant core material.
Water-resistant Gypsum Board is a gypsum board designed for use on walls primarily as a base for the application of ceramic or plastic tile. It is readily identified by its green-tinted face paper and is commonly referred to as “Greenboard.” It has a water-resistant core and a water-repellent face and back paper; it is generally installed in bath, kitchen, and laundry areas.
Gypsum Backing Board, Gypsum Coreboard, and Gypsum Shaftliner Panel are all designed to be used as base materials in multi-layer, solid and semi-solid, and shaftwall systems. Gypsum backing board is used as a base layer for other gypsum board materials in systems or as a base for dry claddings such as acoustic tile. Gypsum coreboard and gypsum shaftliner are manufactured with a type X core, using a specific edge configuration to facilitate installation into specialized stud systems and a type X core.
Exterior Gypsum Soffit Board is designed for use on the underside of eaves, canopies, carports, soffits, and other horizontal exterior surfaces that are indirectly exposed to the weather. It has water-repellent face and back paper and is more sag-resistant than regular wallboard. Exterior gypsum soffit board can be manufactured with a type X core and typically has a light brown face paper.
Gypsum Sheathing Board is used as a backing under exterior siding or cladding. It has a water-repellent face and back paper and can be manufactured with a water-resistant core. Depending on the thickness of the board, gypsum sheathing board is manufactured with either a square or a tongue-and-groove edge and a fire-resistive core. It generally has a brown or light black face paper. Gypsum Base for Veneer Plaster has a distinctive blue-tinted face paper that is treated to facilitate the adhesion of thin coats of hard, high strength gypsum veneer plaster. It is produced in sheets that are the same width as gypsum wallboard and can be manufactured with a fire-resistive core. Application of Gypsum Board
A wide variety of gypsum board application methods are available to meet virtually any need in building design and construction. Gypsum board is applied in either single-layer or multi-layer systems to achieve specific fire or sound ratings. Gypsum board is applied over wood or steel framing or furring. It is also applied to masonry or concrete surfaces, either laminated directly or attached to wood furring strips or steel furring channels. Gypsum board ceilings can be directly attached to joists or trusses or attached to furring or grid systems suspended below structural members. Gypsum board is generally attached to the framing with nails, screws, or staples. Although nails are commonly used in wood frame construction, screws are often preferred because they are applied with automatic screw guns, have excellent holding power, and reduce the possibility of nail pops. A combination of nails and screws may also be used, with nails along edges and screws in the field. Staples are used because they are economical and can be quickly applied with staple guns; however, the use of staples should be limited to the base-layer in multi-layer systems or to gypsum sheathing on wood framing. Gypsum board wall and ceiling surfaces are typically decorated with paint, texture, wallpaper, tile, or paneling. When pre-decorated gypsum board is used, joints are generally covered with matching molding or battens; no additional finishing or decoration is necessary. Single-Layer Application
Single-layer gypsum board applications are the most common in light commercial and in residential construction.
These systems rely on one layer of gypsum board attached to framing or furring.
Although single-layer gypsum board systems are generally adequate to meet most minimum requirements for fire resistance and sound control, multi-layer systems are preferred for higher quality construction and to upgrade beyond the “bare minimums” of many code requirements.
Multi-Layer Application
Multi-layer systems have two or more layers of gypsum board and are used to meet higher sound and fire resistance requirements or to enhance these comfort and safety qualities beyond minimum code requirements.
They also provide better surface quality because face layers can often be laminated over base layers eliminating many or all of the fasteners in the face layer. In addition, face-layer joints are stronger by virtue of the continuous backing provided by the base layers.
Nail pops and ridging are less frequent and imperfectly aligned framing has less effect on the quality of the finished surface.
GYPSUM BOARD TYPICAL MECHANICAL AND PHYSICAL PROPERTIES (GA-235-10) A common misconception is that there are just two basic types of drywall—regular and type X—and beyond this difference, drywall products from various manufacturers are about the same. However, laboratory fire tests by United States Gypsum Company and various independent testing organizations provide strong evidence that there are significant fire-performance differences between drywall products from various manufacturers. It is well known in the construction industry that the single most important characteristic of gypsum drywall is its fire resistance. This is provided by the principal raw material used in its manufacture, CaSO4- 2H2O (gypsum). As the chemical formula shows, gypsum contains chemically combined water (about 50% by volume). When gypsum drywall panels are exposed to fire, the heat converts a portion of the combined water to steam. The heat energy that converts water to steam is thus used up, keeping the opposite side of the gypsum panel cool as long as there is water left in the gypsum, or until the gypsum panel is breached.
In the case of regular gypsum panels, as the water is driven off by heat, the reduction in volume within the gypsum causes large cracks to form, eventually causing the panel to fail.
In a special fire test designed to demonstrate the relative performance of different types of gypsum cores (described later in this section), it was shown that in a fire with a temperature of 1,850ºF, a 5/8″ thickness of regular-core gypsum panels would fail in this manner in 10 to 15 minutes.
Type X gypsum panels, such as Sheetrock brand Firecode gypsum panels, have glass fibers mixed with the gypsum to reinforce the core of the panels.
These fibers have the effect of reducing the extent of and size of the cracks that form as the water is driven off, thereby extending the length of time the gypsum panel can resist the heat without failure.
Fire test results indicate that the same thickness of the type X gypsum drywall exposed to the same temperature (1,850ºF) will last 45 to 60 minutes.
USG has developed a third-generation gypsum drywall product called Sheetrock brand Firecode C gypsum panels that provides even greater resistance to the heat of fire. The core of Firecode C contains more glass fibers than type X—but also a shrinkage-compensating additive, a form of vermiculite that expands in the presence of heat at about the same rate as the gypsum in the core shrinks (from loss of water). Thus the core becomes highly stable in the presence of fire and remains intact even after the combined water is driven off. Tests have shown that this third-generation product resisted the fire for more than two hours, as compared to 45 to 60 minutes for the type X, and 10 to 15minutes for the regular panel under the same test conditions.
In a future posting we’ll discuss the issues facing the fire service related to the newest generation of impact resistant gypsum board that will restrict or preclude entirely our ability to breach walls in residential or commercial occupancies. Here are some links and Spec Sheets to look at in advance, HERE , HERE, HERE and HERE
LAFD FF Glenn Allen Associated Press / February 18, 2011
References and Links Summarizing the many different types of gypsum board used in the industry, this quick reference gives typical uses of, and the ASTM and CSA standards for, each type. Also included is the appropriate industry standard designation for the installation of each type of gypsum board, along with the sizes and thicknesses generally available. Download
APPLICATION OF GYPSUM SHEATHING (GA-253-07)
This publication describes the industry’s latest recommendations for handling, storing, and installing gypsum sheathing under a variety of conditions. A must for anyone hanging gypsum sheathing or involved in EIFS work. Download
FIRE-RESISTANT GYPSUM SHEATHING (GA-254-07)
This publication describes the advantages, recommended uses, limitations, and properties of gypsum sheathing in exterior walls.
Reference guide of construction procedures for gypsum drywall, cement board, veneer plaster and conventional plaster.
Trade Associations and other Organizations
Association of the Wall and Ceiling Industry (AWCI)—Provides services and undertake activities that enhance the members’ ability to operate a successful business. AWCI represents acoustics systems, ceiling systems, drywall systems, exterior insulation and finishing systems, fireproofing, flooring systems, insulation, and stucco contractors, suppliers and manufacturers, and allied trades.
ASTM International (ASTM)—Provides a global forum for the development and publication of voluntary consensus standards for materials, products, systems, and services. In over 130 varied industry areas, ASTM standards serve as the basis for manufacturing, procurement, and regulatory activities. Provides standards that are accepted and used in research and development, product testing, quality systems, and commercial transactions around the globe.
Ceilings and Interior Systems Construction Association (CISCA)—Association for the advancement interior commercial construction, providing education, technical guidance and related resources. CISCA membership includes over 600 of the leading contractors, distributors, manufacturers and independent manufacturer’s representatives worldwide.
Gypsum Association (GA)—Founded in 1930, GA promotes the use of gypsum while advancing the development, growth, and general welfare of the gypsum industry in the United States and Canada on behalf of its member companies.
ICC Evaluation Service (ICC-ES)—Provides technical evaluations of building products, components, methods, and materials and issues reports on code compliance to building regulators, contractors, specifiers, architects, engineers, and the public.
Relevant Codes and Standards
Guide Specifications
Department of Defense (DoD) Unified Facilities Guide Specifications (UFGS)
An NFPA analysis on intentional fires reported to municipal fire departments during 2003-2006. Includes information on structure, vehicle, and outside intentional fires, when and where these fires occur, and arrest and clearance information.
In 2003-2006, an estimated 316,610 intentional fires were reported to U.S. fire departments, annually. The 316,610 intentional fires were associated with losses of 437 civilian fire deaths, 1,404 civilian fire injuries, and $1.1 billion in direct property damage. In 2006, 10 firefighters died and 7,200 firefighters were injured, while on duty, at the scene of or during response to intentional fires.
In 2007, 18% of arson offenses were cleared by arrest or exceptional means. NFPA Report HERE,
Executive Summary Fires in vacant buildings have become a matter of increasing concern as the economy has weakened. In 2003-2006, U.S. fire departments responded to an estimated average of 31,000 structure fires in vacant buildings per year.
These fires resulted in an average of 50 civilian deaths, 141 civilian injuries, and $642 million in direct property damage per year. Based on annual averages for 2003-2006, the 31,000 reported vacant structure fires accounted for 6% of the 520,100 structure fires, 2% of the 3,125 civilian structure fire deaths, 1% of the 15,200 civilian structure fire injuries, and 7% of the $9.0 billion in direct property loss. These statistics are national estimates of fires reported to U.S. municipal fire departments based on the detailed information collected in Version 5.0 of the U.S. Fire Administration’s National Fire Incident Reporting System (NFIRS 5.0) and the National Fire Protection Association’s (NFPA’s) annual fire department experience survey.
Vacant building fires increased by 2% from 31,900 in 2005 to 32,700 in 2006. The increase was similar to the 3% increase in all structure fires. Fires in vacant homes increased more than vacant building fires overall. Vacant home fires increased 11% from 18,900 in 2005 to 21,000 in 2006 compared to a 4% increase in overall home fires during the same period.
The U.S. Census Bureau’s Housing Vacancy Survey found that the number of vacant housing units grew by 5% from 15.7 million in 2005 to 16.4 million in 2006, by 7% from 2006 to 17.7 million in 2007, and by 6% from 2007 to 18.7 million units in 2008. During 2003-2006, 63% of the reported vacant building fires occurred in homes, including 58% in one-or two-family dwellings and 5% in apartments or multiple family properties. Home fires overall (including both vacant and occupied), accounted for 73% of reported structure fires during this time.
Vacant buildings should be secured and combustible materials removed. Section 10.13 of the 2009 edition of NFPA® 1, Fire Code requires owners or those in charge of vacant properties to remove waste and combustible materials and to secure the building to prevent unauthorized people from entering. Fire protection systems are to be maintained unless the authority having jurisdiction grants permission to have them removed from service.
Despite these requirements, half of the reported vacant building fires were in properties that were unsecured. Automatic extinguishing equipment was found in only 2% of vacant building fires. The equipment operated in two-thirds (68%) of fires considered large enough to activate the equipment, but failed to operate in 31%. In 82% of the fires in which the equipment failed to operate, the system had been shut off. Fires in vacant buildings pose a danger to the neighborhood. Flame damage spread beyond the structure in 9% of the fires in secured vacant properties and 12% of unsecured properties, compared to only 3% of structure fires overall.
Fires in vacant buildings are more likely to have been intentionally set than other structure fires. Forty-three percent of reported vacant building fires during this period were intentionally set, compared to 10% of structure fires overall. Vacant buildings accounted for 25% of all intentionally set structure fires. Intentional fires were much more common in unsecured vacant properties (57%) than in those that had been secured (31%).
Other leading causes of vacant building fires were exposure to other fires (8%), heating equipment (also 8%), electrical distribution or lighting equipment (7%), cooking equipment (5%), someone, typically a child, playing with heat source (4%), and smoking materials (3%). When equipment is listed as the cause of the fire, it means that the equipment provided the heat that started the fire.
It does not mean that the equipment malfunctioned or failed. Hot embers and ashes were the most common heat source in vacant building fires. Vacant building fires are more common on weekends and less common between 6:00 a.m. and noon. Vacant building fires were spread out throughout the year, but certain holidays with some more raucous traditions stand out. The four peak days were July 4, July 5, January 1, and October 31. Vacant building fires pose a threat to firefighters.
During the ten-year period 1998-2007, a total of 15 firefighters were fatally injured at the scene of vacant structure fires. On average, 4,500 firefighters were injured at vacant building fires annually during 2003-2006. These account for 13% of the reported firefighter injuries incurred at structure fires per year during this period.
InterFire has a number of resources related to vacant building fires and fire prevention on its website at http://www.interfire.org/features/vacantbuildings.asp, including a draft ordinance to address blight. The best way to prevent vacant building fires is to prevent vacant buildings.
The National Vacant Properties Campaign’s website http://vacantproperties.org/strategies/tools.html describes a number of strategies to address the problem of vacant properties and provides examples of how these strategies have been used. Based on the findings of the Urban Fire Safety Project, NFPA recommends that local fire departments and the national fire service partner with financial institutions and other organizations to prevent home foreclosures and home abandonment.”
Vacant building arson is also addressed in the Arson Prevention PowerPoint Presentation developed by NFPA and Columbus Division of Fire. The presentation, intended for use by local fire departments and community organizations is available at http://www.nfpa.org/assets/files/PDF/Public%20Education/NFPAarsonpresentation.ppt.
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.
