§ 36 — Windows and skylights for public halls and stairs

§ 36. Windows and skylights for public halls and stairs. 1. In every\nmultiple dwelling erected after April eighteenth, nineteen hundred\ntwenty-nine, one at least of the required windows provided to light each\npublic hall or part thereof shall be at least two feet six inches wide\nand five feet high. Every required window in such a hall shall open upon\na street, court, yard or space above a setback. On the top story of such\na dwelling a ventilating skylight of the same dimensions shall be\naccepted in lieu of a window for that story.\n 2. In every multiple dwelling erected after April eighteenth, nineteen\nhundred twenty-nine, there shall be in the roof, directly over each\nrequired stair, fire-stair and fire-tower, a ventilating skylight\nprovided with ventilators having a minimum opening of forty square\ninches or with fixed or movable louvres. The roof of every such skylight\nshall be glazed with plain glass and equipped with suitable wire screens\nabove and below. The glazed area of every such skylight shall be at\nleast twenty square feet, except that in a class A dwelling or section\nthereof two stories or less in height and occupied by not more than two\nfamilies on each story and in dwellings three stories in height erected\npursuant to plans filed with the department on or after May first,\nnineteen hundred fifty-nine and occupied by not more than one family on\neach story, the glazed area of such a skylight need be only nine square\nfeet. In lieu of a skylight a window of the same area as prescribed in\nsubdivision one may be provided. If such a window is used in lieu of a\nskylight, fixed louvres having a minimum opening of forty square inches\nshall also be installed in or directly adjacent to such window.\n 3. When any stair, fire-stair or fire-tower in such a dwelling\nterminates at the level of a setback of an outer wall and such setback\nconsists of a terrace at least four feet in width, measured between the\ninside of the parapet wall and the wall of the building, and at least\nten feet in length, measured parallel to the wall of the building, there\nmay be provided in lieu of such a skylight a fireproof door and assembly\nwith the door self-closing giving access from such stair, fire-stair or\nfire-tower to such terrace. Such door shall have a panel at least five\nsquare feet in area glazed with wire glass and shall be equipped with\nfixed or movable louvres with an opening of at least forty square\ninches.\n