2. Bulding Classification and Structural Fire Resistance Flashcards
Type I-V
Fire restive Non combustible Exterior protected ordinary Heavy timber Wood frame
With the exception of ___, the major classifications are further divided into two or three subclassifications.
Type IV heavy timber
NFPA 220, each classification is designated by a three-digit code.
First
Second
Third
First- fire resistance rating in hours of exterior bearing walls
Second- fire resistance rating of structural frames or columns and girders that support loads of more then one floor
Third- fire resistance rating of the floor construction
Type II-A (protected) requires that structural components have a ___ fire resistance.
1 hour
$$$
Type III has been commonly referred to as ___
Ordinary construction
Type III construction commonly uses nominal ___ inch x ___ inch joist for floor construction.
2x10
Concealed spaces in type III construction must contain appropriate ____
Fire stops
Type ____ construction is the only construction type that does not include A and B subdivisions.
IV
Instead the designation is 2HH
Type IV construction requires min nominal dimensions of ___ in x ___ in
6x10
The fundamental problem with type V construction is the presence of extensive concealed ____.
Void
In modern practice, wood frame buildings are most often constructed using a method known as ____
Light frame construction
Notes:
- some building codes contain a provision to omit their fire resistive rating for a roof construction for some occupancy types when the roof is located more than 20 feet above the floor
- Many types of 5 structures are required to have a 1 hour fire resistance for structural components
- IBC 10 major occupancy
- NFPA 12 major occupancy
____, the total quantity of combustible material in a compartment, is a critical factor when determining the fire safety requirements of a space.
Fuel load
$$$
The fuel load contributes to the calculations of the ___, max amount of heat that can be released if all fuel is consumed.
Fire load
The fire load will vary depending on the ___ of the fuel load.
Heat of combustion
The IBC defines a ___ as being “in the form in which used and under the conditions anticipated, will not ignite, burn, support combustion, or release flammable vapors, when subjected to fire of heat.”
Non combustible
$$$
The commonly used test for determining combustibility is ___
ASTME 136
Standard test method for behavior of materials in a vertical tube furnace at 750°C
The severity of a fire is a factor of the ___ plus the rate a which a fuel burns.
Fire load
The ____ the available fuel burns, the ____ will be the heat release rate.
Faster
Greater
$$$
___ indicates the ability of a structure assembly to maintain its load bearing capacity and structural integrity under fire conditions.
Fire resistance
$$$
The standard ___ test is widely used in fire protection to establish the required performance standards in building codes.
Fire-resistance
A test will be stoped at 2 hours if the testing material does not fail before the two hours are over
Normally assemblies are not tested beyond 4 hours because this is the maximum time that the building code requires
The number is rounded down to the nearest interval
Despite the limitations of laboratory I trolled testing, ____ year is the the only standardized test method currently universally accepted by building codes
E-119
Also known as NFPA 251 Standard time temperature test is the most commonly used method of satisfying building code requirements for structural fire resistance
