[Code 1993, §§ 5.28, 5.31(1)]
(a) APPROVED AREA AUTOMATIC FIRE SPRINKLER EQUIPMENT BASEMENT COMBUSTIBLE FIRE RESISTIVE
FIRE WALL INCOMBUSTIBLE MULTIFAMILY DWELLING NONCOMBUSTIBLE NONFLAMMABLE STORY
The following words, terms and phrases, when used in this article, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:
The maximum horizontal projected area on one floor of a building or structure within the exterior walls or between approved fire walls.
A system of piping connected to an adequate water supply, provided with approved automatic fire sprinklers and devices arranged and located to discharge water automatically to the seat of the fire.
Any story where less than half the height between floor and ceiling is above the average level of the street, sidewalk or finished grade.
A material or structure which can burn. The term "combustible" is a relative term. Many materials which will burn under one set of conditions will not burn under conditions (e.g., structural steel is noncombustible, but fine steel wool is combustible). The term "combustible" does not usually indicate ease of ignition, burning intensity or rate of burning, except when modified by a term such as "highly," such as in "highly combustible interior finish."
The type of construction in which the structural members, including walls, partitions, columns, floor and roof construction, are of noncombustible materials with fire resistive ratings not less than those specified in the following table. The two classifications are identified by the required fire resistance of floors as a matter of convenience.
Fire Resistance Rating of Structural Members in Hours | ||
|---|---|---|
Classification | ||
Three-Hour | Two-Hour | |
Bearing walls or bearing portion of walls, exterior or interior | 4 | 4 |
Nonbearing walls or portions of walls, exterior or interior (NC — Noncombustible) | NC | NC |
Principal supporting members, including columns, trusses, girders and beams for 1 floor or roof only | 3 | 2 |
Principal supporting members, including columns, trusses, girders and beams for more than 1 floor or roof | 4 | 3 |
Secondary floor construction members, such as the beams, slabs and joints not affecting the stability of the building | 3 | 2 |
Secondary roof construction members, such as beams, purlins and slabs not affecting the stability of the building | 2 | 1 1/2 |
Interior partitions enclosing stairways and other openings through floors | 2 | 2 |
A wall which has a fire resistance rating of not less than four hours and which subdivides a building or separates buildings to restrict the spread of fire, including a three-foot parapet wall.
The same as the term "noncombustible," but may be subject to misunderstanding due to the prefix in-; therefore, the term "noncombustible" is accordingly preferred.
A building, or portion thereof, containing three or more dwelling units, including tenement houses, apartment houses, condominiums or flats.
Not combustible.
Not flammable.
The part of a building comprised between a floor and the floor or roof next above.