O-1954-476 - Laserfiche WebLink

Browse Search

. - .., " e . e .e,- SECTICN 21. NONCOMBUSTIBLE CONS'lRUCTION. 1. DEFINITION. Noncombustible construction" as applied to buildings" means that in 'Which all structural members" inaluding floors, roofs and their supports, are of steel" iron" concrete, or of other noncombustible materials, and in which the exterior wall.s are of noncombustible construction having a fire resistance rating of not less than two hours. 2. WALLS. Exterior -enclosure walls shall provide a durable and stable weather proof ex terior. 3. S'lRUCTURAL MEMBERS. All structural members shall be of st7el, iron, reinforced concrete, or of other approved noncombustible materials. 4. PARTITIONS. (a) If combustible material enters into the construction of par- _ titions, they shall be built to have a fire resistance r ating of not less than one hour; but this shaJJ. not prohibit the use .of wooden doors, door casings, frames" jambs, and bucks" windOW' and transom frames and casings, unless the p - partitions are required to b e fire partitions. (b) Nothing in this section shall. prevent the erection of temporary partitions of wood and glas~ or of metal and glass within the rooms or spaces occupied by a single tenant. ( c) All pet"manent partitions shall rest on noncombustible ma terial3 . SECTION 22. WOW FRAME COOS'1RUCTION. . . 1. DEFDUTION. Wood frame cons~ruction, as applied to buildings" means that in which wallis and interior construction arewholly or partly of wood. 2. WALLS. (a) Framing for exterior walls shall be constructed to develop a strength and rigidity equivalent to wooden studding, not less than 2 by 4 inches, nom:inal dimenSions, spaced 16 inches on centers with the larger dimension perpen- dicular to the wall, and braced with sheathing or diagonal bracing at t he comers to secure the necessary rigidity; except that in one-story buildin~s studs not over 10 feet in length may be spaced not to exceed 24 inches on centers. (b) In buildings except private garages, an exterior wall which is less than 3 feet distant from the lot line along an adjoining area 'Which:iis or may .' be built upon shall be of noncombustible consl;ruotion having a fire resistance .... ,J rating of not less than two hour,S; except that the material of the weather sur- face mBj1 'be similar to that of other exterior walls of the building.