Ordinance 4321 - Laserfiche WebLink

• F. Skylic hts .;nd Ventilators. Skylights and ventilators of fire-resistive superstructures constructed of thin glass in metal frames, each not less than 100 square feet in area, shall be placed between curtain boards and extended longitudinally along and on each side of the ridge. .bbove and below the skylight there shall be placed standard metal screens, the one above to be of sufficient strength to support one man's weight. Monitors or other ventilators giving equivalent venting capacity shall be acceptable. G. Vertical Openings. Stairs, elevators, escalators, shutes, and other vertical openings of fire-resistive superstructures shall have enclosures constructed of approved masonry or reinforced concrete, or of a form of construct-. ion of non-combustible material having a fire-resistance rating of not • less than two hours. When such enclosures form shafts extending from the pier deck to the roof, they shall be provided with thin glass in metal frame skylights. Door openings shall be protected by self-closing or automatic fire doors approved for the location in which they are to be used. Section 7. Non-Combustible Superstructures. All non-combustible superstructures shall be constructed of steel, concrete or other non-combustible materials and shall comply with the follow- ing specific requirements: A. Walls and Ooenines. • Walls shall consist of non-combustible construction such as corrugated iron, corrugated cement asbestos, or other equivalent material securely fastened to the frame. All doors in exterior walls shall be fire doors or shall be' of non-combustible construction. All openings in the exterior walls shall be provided with doors or windows of a type suitable for protection against the degree of exposure that may exist, as determined by the Chief of the Fire Department, but in all cases standard protection shall be provided for openings exposed within 30 feet by structures (not vessels). Fire doors and windows shall conform to the Standard for installation of Fire Doors and Windows (NFPA No. 80, 1W1. Exterior walls which are 'less than 30 feet from other buildings or from property lines shall be of construct- ion of not less than four (4) hour fire resistance. At intervals of approximately 200 feet along exterior walls there shall be a dwarf or "smash" door, designated by suitable signs, for the use of watchmen, firemen and workmen. B. Roof. • Roof decks shall be constructed of corrugated iron, corrugated cement asbestos, or other non-combustible material of equivalent strength and fire characteristics. Treated wood planking two inches nominal thickness, splined or tongued and grooved, may be used as roof decking provided such wood is treated to make it fire retardant in accordance with the requirement of NFPA Standard No. 703, adopted May, 1961. Decks shall be capable of supporting men for fire fighting Ordinance -7-