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NYC Building Code

§ 1029.13.2.2.1 — § 1029.13.2.2.1

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What is NYC BC § 1029.13.2.2.1?

Quick Answer

This section establishes construction tolerances for adjacent risers on stepped aisles, specifying maximum height differences based on tread depth. The tolerances are set at 3/16 inch for equal height risers and vary for unequal height risers depending on tread depth. Applies to building owners involved in construction and design of stepped aisles.

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

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1029.13.2.2.1 Construction tolerances.

BC § 1029.13.2.2.1

The tolerance between adjacent risers on a stepped aisle that were designed to be equal height shall not exceed 3/16 inch (4.8 mm). Where the stepped aisle is designed in accordance with the exception of Section 1029.13.2.2, the stepped aisle shall be constructed so that each riser of unequal height, determined in the direction of descent, is not more than 3/8 inch (9.5 mm) in height different from adjacent risers where stepped aisle treads are less than 22 inches (560 mm) in depth and 3/4 inch (19.1 mm) in height different from adjacent risers where stepped aisle treads are 22 inches (558.8 mm) or greater in depth. (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.

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