§ 256. Bulkheads and scuttles. 1. Every required stair and fire-stair in a dwelling three stories or more in height shall have a bulkhead constructed as provided for fireproof dwellings in section two hundred four.

2. A dwelling which is two stories or less in height shall be provided at each required stair or fire-stair either with such bulkhead or with a scuttle at least two feet by three feet in size, located in the ceiling of the public hall on the top story. Every such scuttle shall be arranged to be readily opened, shall be covered on the outside with metal and shall be provided with stairs or a stationary metal ladder leading thereto and easily accessible to all the occupants of the dwelling.

3. When the roof of a dwelling is pitched or sloped more than fifteen degrees, no bulkhead or scuttle, or stair or ladder leading thereto, shall be required.