251 – Height Limitation.

§ 251. Height limitation. A dwelling not exceeding seventy-five feet or six stories in height may be non-fireproof construction.

259 – Cellar and Basement Stairs.

§ 259. Cellar and basement stairs. A cellar or basement stair located inside the dwelling shall be entirely enclosed with fireproof walls and be provided, at all openings, with fireproof doors and assemblies, with the doors self-closing, except that in any dwelling three stories or less in height, such stair may be enclosed with walls […]

260 – One and Two-Story Frame Dwellings; Area Limitation.

§ 260. One and two-story frame dwellings; area limitation. A frame dwelling not exceeding two stories in height erected pursuant to plans filed after April first, nineteen hundred fifty-nine, and containing an area greater than three thousand square feet must, in addition to any other applicable provisions of this article, comply with the following provisions: […]