Par. 1. - All elevator or dumb waiter shafts hereafter constructed in any tenement house shall be fireproof throughout, with self-closing doors at all openings at each story. But nothing in this section shall be so construed as to require inclosures about elevators or dumb waiters in the well-hole of stairs where the stairs themselves are inclosed in walls of incombustible materials, and are entirely constructed of fireproof materials as hereinbefore provided. Every vent shaft hereafter constructed in any tenement house shall have an intake of at least the dimensions provided for vent courts in section sixty-one, and shall be of the same minimum dimensions; and the skylight covering such vent shaft shall be raised at all points at least one foot above the top of the walls of such vent shaft, and the space between the top of said walls and the skylight shall remain at all points open and unobstructed except for such supports essential to the stability of the skylight, as may be approved by the commissioner.

Section 53. Bakeries and Fat Boiling

Par. 1. - No bakery and no place of business in which fat is boiled shall be maintained in any tenement house which is not fireproof throughout, unless the ceiling and side walls of said bakery or of the said place where fat boiling is done are made safe by fireproof materials around the same, and there shall be no openings either by door or window, dumb-waiter shafts or otherwise, between said bakery or said place where fat is boiled in any tenement house and the other parts of the building.

Section 54. Other Dangerous Businesses

Par. 1. - All transoms and windows opening into halls from any part of a tenement house where paint, oil, spirituous liquors or drugs are stored for the purpose of sale or otherwise shall be glazed with wire-glass, or they shall be removed and closed up as solidly as the rest of the wall. There shall be between any such hall and such part of said tenement house a fireproof self-closing door.