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What is NYC BC § 1011.5.5?

Quick Answer

This section specifies the requirements for nosings and riser profiles in stair construction. Nosings must have a curvature or bevel within defined measurements, while risers are required to be solid and either vertical or sloped at a specified angle. Applies to building owners and contractors involved in stair design and construction.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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1011.5.5 Nosing and riser profile.

BC § 1011.5.5

Nosings shall have a curvature or bevel of not less than 1/16 inch (1.6 mm) but not more than 9/16 inch (14.3 mm) from the foremost projection of the tread. Risers shall be solid and vertical or sloped under the tread above from the underside of the nosing above at an angle not more than 30 degrees (0.52 rad) from the vertical.

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