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NYC Building Code

§ 1811.5.2 — § 1811.5.2

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What is NYC BC § 1811.5.2?

Quick Answer

This section mandates that timber piles supporting permanent structures be treated with preservatives unless their tops are below the lowest groundwater level. It specifies treatment standards according to AWPA specifications and requires a quality control program administered by an approved agency. Applies to building owners using timber piles in construction.

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

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1811.5.2 Preservative treatment.

BC § 1811.5.2

Timber piles used to support permanent structures shall be treated in accordance with this section unless it is established that the tops of the untreated timber piles will be below the lowest groundwater level assumed to exist during the life of the structure as specified in Section 1810.2.12. Preservative and minimum final retention shall be in accordance with AWPA U1 (Commodity Specification E, Use Category 4C) for round timber piles and AWPA U1 (Commodity Specification A, Use Category 4B) for sawn timber piles. Preservative-treated timber piles shall be subject to a quality control program administered by an approved agency. Cuts to timber piles shall be treated in accordance with AWPA M4.

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