O-1954-476 - Laserfiche WebLink

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,e , t " . e -38- (c) In all other buildings such parapets ,shall be not less than 12 inches thick" and carried not less than 3 feet above the roof. (d) Parapets sha:~l be properly coped with noncombustible, weatherproof :naterial and nashed with the flashing ex tending through the parapet wall under the t~oping. All corners of all parapet walls shall be reinforced with at least one i :Ll'lch round bar in every third joint" continuous around the corner and extending into 1ihe masonry at least 3 feet from the corner. SECTION 31. FIRE PARTITIONS. 1. Construction.. (a) Fire partitions shaJ.l have fire resistance ratings of at least two hours. They sh all be constructed of mas onry or reinforced concrete, or other approved form of constructio::l of noncombustible materials. Fire partitions used for load bearing shall confo::-m to the requirements for bearing walls in sections 27 & 28, in addition to meet:ing the requirements of this section. (b) Fire parti tiollS shall b e supported in each story on construction h.9.ving a fire resistance rat:.ng of not less than 2 hours; provided that when they a.].s 0 are load bearing, the supporting construction shall have a fire resistance rating of not less than 4 hOl;rs in case the building is of fireproof construction or semifireproof construction, and not less than 3 hours in case of other con- s1:it"uction. (c) The maximum lU'lsupported height of a fire partitiop. shall not exceed lE: times its total thiclmess unless suitably reinforced and. anchored at floor and ceiling or unless substantially secured to vertical supports at int;ervals of not ov'er 18 times the thiclmess. (d) Fire partition:3 shall be deemed continuous, even though the several pa.:rts are not ctir ectly over one another in successive stories if the intervening pa:rts of the floors at the leyels where offsets occur, are unpierced and of fire- pr':>of construction or semifirElproof construction and all parts not supported directly on the foundations are carried on f~reproof construction. 2. OPENINGS. (a) Required fire p~rtitions shall have ~o openings other than required dOClr openings, or properly prctected duct openings. (b) Each opening in a required fire partition shall be equipped with an approved fire door set in an approved door frame. (c) Ea.6h opening in a fire partition serving as a horizontal exit shall be protected by an approved self-closing fire door.