For a firefighter, the effects of fire conditions on a building are extremely significant. Factors
that influence fire behavior: ** Answ** basic building classifications
occupancy classifications
fire or fuel load
fire resistance
IBC initially classifies structures by .............. ** Answ** the materials used in their
construction
In fire protection and building code enforcement, buildings are grouped into five major
classifications: ** Answ** Type I- fire resistive
Type II- Noncombustible or protected noncombustible
Type III- Exterior protected (masonry)
Type IV- Heavy Timber
Type V- Wood Frame
These classifications can help firefighters determine............
They also indicate............... ** Answ** likelihood of structural collapse under fire
degree of occupant safety provided by building's construction
The building classifications used in the building codes are based on ......... and ........... **
Answ** materials used in construction
fire resistance ratings required for structural components
NFPA.......... details the requirements for each of the classifications and subclassifications. **
Answ** NFPA 220- Standard on types of building construction
, NFPA 220- each classification is designated by a three digit code. The digits are explained as
follows: ** Answ** 1st=fire resistance(in hours)- exterior bearing walls
2nd=fire resistance-structural frames or columns and girders supporting loads more than one
floor
3rd=fire resistance- floor construction
........... is classified by the presence of noncombustible structural components that have fire
resistance ratings within a specified range. ** Answ** Type I (fire-resistive)
The addition of fire resistance increases.......... during a fire. ** Answ** structural integrity
Examples of variation in fire resistance by application,
Type I construction: Bearing walls, columns and beams ** Answ** 2-4hrs, as specified by
local code and construction classification
Examples of variation in fire resistance by application,
Type I construction: Floor construction ** Answ** 2 or 3 hours
Examples of variation in fire resistance by application,
Type I construction: Roof deck and construction supporting roof ** Answ** one to two
hours
Examples of variation in fire resistance by application,
Type I construction: Interior partitions enclosing stairwells and corridors ** Answ**
specified by local code, usually 1 or 2 hours
Examples of variation in fire resistance by application,
Type I construction: Partitions separating occupancies or tenants ** Answ** specified by
local code