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What is NYC BC § 2109.4.2.1?

Quick Answer

This section specifies that masonry walls above roof level, up to 12 feet in height, enclosing certain structures may have a thickness of up to 8 inches without affecting the height or thickness requirements of the walls below. Applies to building owners managing structures with such walls.

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

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2109.4.2.1 Walls above roof level.

BC § 2109.4.2.1

Masonry walls above roof level, 12 feet (3658 mm) or less in height, enclosing stairways, machinery rooms, shafts, or penthouses, may be up to 8 inches (203 mm) thick and shall be considered as neither increasing the height nor requiring any increase in the thickness of the wall below.

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