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What is NYC BC § 1505.5?

Quick Answer

This section outlines the construction requirements for sloping roofs based on their angle. Roofs with a slope exceeding 60 degrees must use materials with a fire-resistance rating equivalent to that of an exterior nonbearing wall. It also specifies requirements for false mansards exposed to the outdoors. Applies to building owners involved in roof construction.

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1505.5 Construction of sloping roofs.

BC § 1505.5

Roofs having a slope of more than 60 degrees (1.05 rad) to the horizontal shall be constructed of material having the same fire-resistance rating as required for an exterior nonbearing wall of the building of which it is a part. When the slope is 60 degrees (1.05 rad) or less to the horizontal, the sloping roof shall be constructed as required for the roof of the building. Where the back of a false mansard is exposed to the outdoors, the back shall be covered with noncombustible material or with roof covering as required for the roof of the building.

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