(A) The stair and elevator shafts of all buildings except private dwellings hereafter erected more than two stories high, shall be enclosed continually by incombustible material, consisting of reinforced gunite not less than two and one-half inches thick, or of solid portland cement plaster not less than two and one-half inches thick on metal lath and metal frame, or of reinforced concrete not less than three inches thick, or of any fireproof material or construction that will pass the standard fire test of the Underwriter’s Laboratories for a period of at least two hours.
(B) The thickness must in all cases be sufficient to give rigidity.
(Prior Code, § 7-2-10) Penalty, see § 10.99