O-1954-476 - Laserfiche WebLink

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. ,r, " , " , " t~, ,,-... ./ . . -27- FJRESTOPPING. (a.) Ex ter.iDr. wall.s of wood frame construction shall be prqzperly firestopped at each fioor level, at the top story ceiling level, at the roof level in the case of flat roofs, and at the :toot of roof rafters in the case of sloping roofs. (b) Joists shall be firestopped at the ends and over supports for the full depth of the joists. (c) Interior stud partitions shall be firestopped at the noor and ceiling of each story by a 2-inch, nominal dimension" wood plate, the 1IVidth of the stud, or the equivalent. (d) When sliding doors are pocketed in par~ tions, such pockets shall be completely firestopped at the top, bottom and ends. (e) Firestopping shall b e of noncombustible material or of wood not less than 2 inches in thicKness, nominal dimension. No firestopping shall be covered or concealed until inspected 't:u the building official. 16. !RAFT STOPS IN ATTIC SPACES. Dl'aft stops shall be provided in attic spaces as required by Section 20-10. SECTION 23. UNPROTECTED MEl'AL CONS'lRUCTION. Unprotected IlE!tal consl:iruction, as applied to buildings, means that in which the structural supports are unprotected metal and in which floors and roofs are of noncombustible construction, and the exterior 'V'Talls are of non- combustibJ.e constt'uction having a fire resistance rating of less than 2 hours. SECTION 24. WORKMANSHIP AND MATERI.AI5 . All building material;; shall be of good quality. Worlananship in the fabrication, preparation and installation of materials shall conform to generally accepted good practice. SECTIOl.J 25. DESIGN LOADS, STRESSES AND WIND PRESSURE. Buildings or structures, including tanks" towers, end signs, hereafter erected and all new construction 'in the alteration of heretofore erected buildings or structures shall be disigned and constructed for live and dead loads and. wind pressures in accordance 'With the National Building Code, 1949 Edition, recommended by the National Board of Fire UnderwI.'iters, and with resulting stresses not in ex- cess of those permitted by said code. SECTION 26. FOUNDATIONS. Except when erected upon hardpan or solid rock or upon walls or piers on the water front, foundation walls or other permanent supports shall be carried not less than one foot below frost line and shall rest on solid ground or on leveled rock, or on piles <I' ranging timbers when solid earth or rock is not found;