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NYC Building Code

§ 1809.4 — § 1809.4

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What is NYC BC § 1809.4?

Quick Answer

This section addresses the design considerations for shallow foundations that are supported at different levels or adjacent to other structures. It requires an assessment of the stability of lower foundations, lateral support requirements, additional loads, and the effects of dragdown on deep foundations. Applies to building owners involved in foundation design.

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

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1809.4 Shallow foundations at different levels.

BC § 1809.4

Where shallow foundations are supported at different levels, or are at different levels from the shallow foundations of adjacent structures, the influence of the pressures under the higher foundation on the stability of the lower foundations shall be considered in the design. The design shall consider the requirements for lateral support of the material supporting the higher foundation, the additional load imposed on the lower foundations, and assessment of the effects of dragdown on deep foundations supporting adjacent buildings or compression of soils supporting adjacent buildings.

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