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two (2) inch planking ^.tiled to studding, ore non-combustible <br /> siding ts specified in Section 7 (_') of this ordinance. Studding <br /> shall be not less than threo inches in its le est dimension. <br /> Fxterior walls which re less then 30 feet from other buildings <br /> or from property lines shell be of construction of not less then <br /> four (4) hour lire resistance rating, and cargo doors or other <br /> openings in such wells shell be protects =f by standard fire doors <br /> and fire windows. <br /> C. Timber Columns. <br /> Columns shall be suitable for the load carried, but shall be <br /> not less than eight inches in the smallest cross-section dimension. <br /> D. Roof, <br /> Wood planking for roof construction shall be of not less than <br /> two inch nominal thickness, splined or tongued and grooved or roof <br /> decks may be as specified in Section 7 (B) of this ordinance. <br /> Timber for beams and girders shall be not less than four inches <br /> nominal in least dimension. Roof coverings shall be Class "A" or <br /> "B" roofing as classified by Underwriters Laboratories, Inc. or the <br /> equivalent. <br /> E. Minor Deck Structures. <br /> Superstructures on open deck or flat top piers, that are used <br /> only for offices, toilets or for storage of miscellaneous pier <br /> supplies and ship stores which do not exceed 1, 500 s::ue.re feet <br /> in individual area may be of the conventio el one story wood or <br /> steel frame construction covered with corrugated galvanized iron, <br /> corrugated moulded asbestos or sheet aluminum, siding and roofing, <br /> or equivalent material securely fastened to the frame. <br /> F. Curtain Boards or Draft Stops, <br /> Curtain boards or draft stops constructed of one hour fire resist- <br /> ive material shall be located between fire walls at intervals not <br /> exceeding 100 feet. When construction permits the curtain boards <br /> shall be carried down to the lower chord of the roof trusses. Instal- <br /> lation of curtain boards shall not be less than that required by <br /> Standard for the Installation of Sprinkler Systeme (NEPA No. 13, <br /> 1968). <br /> G. Skylights and Ventilators.. <br /> Skylights and ventilators constructed of thin glass in metal <br /> frames, each not less than 100 square feet in area, shall be placed <br /> between curtain boards and extended longitudinally along and on each <br /> side of the ridge. Above and below the skylights there shall be placed <br /> standard metal screens, the one above to be of sufficient strength to <br /> support one man's weight. Monitors or other ventilators giving <br /> equivalent venting capacity shall be acceptable. <br /> Ordinance -9- <br />