Chpt 2 Flashcards
To the firefighter, however the most significant characteristic of a building is not the its architectural style but how it behaves under
Fire conditions
_____ buildings permit firefighters to make a more aggressive interior attack than they can make in non fire resistive buildings
Fire resistive
Also provide an increased degree of occupant safety
Fire resistive buildings
Determines the likelihood of structural collapse under fire conditions
Fire resistance
From a fire protection standpoint, one of the most basic properties of building materials is their degree of _____
Fire resistance
Is the ability to maintain its load bearing capacity and structural integrity under fire conditions
Fire resistance
is not prone to structural failure under fire conditions
Fire resistive construction
The fire resistance of structural components can be evaluated quantitivley and is known as the
Fire resistance rating
A building code will typically require that columns supporting the floors in a fire resistive building have a fire resistance rating of
3 hours
The walls enclosing an exit stairwell, which may or may not be load bearing, typically must have a fire resistive rating of ____ hours to protect the stairwell
1 to 2 hours
The most commonly used method of determining fire resistance is by
Laboratory test
The _____ is widely used in fire protection to establish the required performance standards in building codes.
Standard fire resistance test
The primary means used to determine a fire resistance rating is to subject the component to be evaluated to the heat of a
Standard fire in a test furnace
It must be clearly understood that the fire resistance ratings are established using a standard
Laboratory test fire
The ____ tests is the only method currently universally accepted by building codes
E-119 test
To make the results of fire resistance testing available and useful to engineers, architects, and building officials, the test results are published by the testing laboratories. Probably the best known laboratories is
Underwriters laboratories inc
Underwriters laboratories annually publishes a _____, which lists assemblies that have been tested and their fire resistance ratings
Fire resistance directory
Because testing materials in a furnace is costly and because some structural members may not match those that have been previously tested,_______ have been developed to predict the behavior of materials under test conditions without the need for actual testing
Mathematical equations
This standard known as ____ provides the methods for calculating fire resistance ratings that are equivalent to the results obtained from the standard fire test
ASCE/SFPE 29 standard calculations methods for structural fire protection
The ____ is the most commonly used method of satisfying building code requirements for structural fire resistance
NFPA 251 standard time temperature test
Fundamentally, a _____ material is one that in the form in which used and under conditions anticipated will not ignite, burn, support combustion, or release flammable vapors, when subjected to fire and heat.
Non combustible
The most commonly used test for determining combustibility is
ASTM E 136 standard test method for behavior of materials in a vertical tube furnace
Buildings are grouped into five major classifications
Type 1 fire resistive Type 2 non combustible or protected non combustible Type 3 exterior protected masonry Type 4 heavy timber Type 5 wood frame
In ____, the structural members are non combustible construction that has a specified fire resistance
Type 1 fire resistive
