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NYC Building Code

§ 1809.3.1 — § 1809.3.1

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What is NYC BC § 1809.3.1?

Quick Answer

This section outlines the requirements for frost protection of shallow foundations, pile caps, and other permanent supports of buildings and structures. It specifies methods such as extending below grade or constructing according to ASCE 32. Applies to building owners responsible for foundation design and construction compliance.

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

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1809.3.1 Frost protection.

BC § 1809.3.1

Except where otherwise protected from frost, shallow foundations, pile caps, and other permanent supports of buildings and structures shall be protected from frost by one or more of the following methods: 1. Extending a minimum of 4 feet (1220 mm) below the lowest adjacent permanent exposed grade; Exception: Grade beams shall be embedded a minimum of 18 inches (457.2 mm) below the lowest adjacent permanent exposed grade.

2.Constructing in accordance with ASCE 32; or 3. Erecting on solid rock. Exception: Free-standing buildings meeting all of the following conditions shall not be required to be frost protected: 1. Classified in Structural Occupancy Category I (see Table 1604.5); 2. Area of 400 square feet (37.1 m 2 ) or less; and 3. Eave height of 10 feet (3048 mm) or less.

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