Building Construction Types Fire
Type V-B Type V-N V (000) 8 5-B VI-unp. Unprotected Combustible IBC/IFC – International Building Code / International Fire Code UBC/UFC – Uniform Building Code / Uniform Fire Code NFPA – National Fire Protection Association NFIRS – National Fire Incident Reporting System BOCA – BOCA / National Building Code SBC – Standard / Southern.
All buildings must be classified into one of six construction classes (see number 3). Classification of a building class is based on two factors: building elements and fire-resistance rating. These factors may not be included in the submission/documentation, in which case additional information will need to be requested.- Building elements: The building materials used in the construction of the following elements are the foundation for classification, be they wood, steel, or masonry.
- Structural frame
- Exterior bearing walls
- Interior bearing walls
- Exterior nonbearing walls and partitions
- Interior non-bearing walls and partitions
- Floor construction, including supporting beams and joists
- Roof construction, including supporting beams and joists, are comprised of
- Fire-resistance rating: This is the other factor in determining construction class. The building materials used in the construction of the building elements above will have a fire-resistance rating. Fire-resistance rating typically means the duration for which a passive fire protection system can withstand a standard fire resistance test. This can be quantified simply as a measure of time (ex. 0 hours, 1 hour, or 2 hours), or it may entail a host of other criteria involving other evidence of functionality or fitness for purpose.
- “Minimum” rule: It is important to remember when selecting the construction class that the building is only as strong as its weakest element. For example, a masonry building may have an unprotected wood roof. The wood roof is the weakest member such that it has no fire-resistance. Thus, the construction class would be Joisted Masonry (see below). Now imagine this same building with a metal deck roof. So long as the supporting members of the building do not contain wood then this building would be Masonry Noncombustible (see below).
A structure fire is a fire involving the structural components of various types of residential, commercial or industrial buildings, such as barn fires. Residential buildings range from single-family detached homes and townhouses to apartments and tower blocks, or various commercial buildings ranging from offices to shopping malls. This is in contrast to 'room and contents' fires, chimney fires, vehicle fires, wildfires or other outdoor fires.
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Building Construction Types Fire Service Ppt
Structure fires typically have a similar response from the fire department that include engines, ladder trucks, rescue squads, chief officers, and an EMS unit, each of which will have specific initial assignments. The actual response and assignments will vary between fire departments.
It is not unusual for some fire departments to have a pre-determined mobilization plan for when a fire incident is reported in certain structures in their area. This plan may include mobilizing the nearest aerial firefighting vehicle to a tower block, or a foam-carrying vehicle to structures known to contain certain hazardous chemicals.
Types (United States)[edit]
In the United States, according to NFPA, structures are divided into five construction types for the purposes of firefighting, and are listed from least combustible to most combustible:
| Type I: Fire Resistive | Typically used in high-rises. The material comprising the structure is either inherently able to withstand significant exposure to fire (concrete), or in which a fire resistive covering is applied to steel structural members. |
| Type II: Non-combustible | Typically used in strip shopping center malls. Roofs are constructed out of steel rafters. |
| Type III: Ordinary construction | Brick and mortar walls, wood frame floors. City rowhouses are where this type of construction is most often found. |
| Type IV: Heavy timber | Often used in churches or other community-based buildings. |
| Type V: Wood frame | Typically used in recent construction of single-family dwellings, townhouses, garden apartments with four floors or less. |
Causes of house fires[edit]
In a recent study, conducted by American Survey CO, for the period of 2005 - 2010, the causes of house fires across America were as follows:
- Appliances and electrical (stoves, microwaves, toasters, radiators, various heating systems, small appliances) - approximately 47%
- Gas leaks - around 5-7%
- Open flames (candles, fireplaces) - approximately 32%
- Children playing with matches - Around 10%
- Spreading of fires from house to house - approximately 3%
References[edit]
External links[edit]
Media related to Burning buildings at Wikimedia Commons
- Haung, Kai. 2009. Population and Building Factors That Impact Residential Fire Rates in Large U.S. Cities. Applied Research Project. Texas State University. http://ecommons.txstate.edu/arp/287/