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What is NYC BC § 1817.7.1.7?

Quick Answer

This section outlines the requirements for multi-tier pit-pier underpinning, specifying that upper piers must be braced before excavating lower piers. It also states that the installation of upper and lower piers should be staggered unless the design includes methods to prevent displacement. Applies to construction professionals involved in underpinning projects.

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

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1817.7.1.7 Multi-tier pit-pier underpinning.

BC § 1817.7.1.7

Where multi-tier pit-pier underpinning is utilized, the upper piers shall be braced prior to the excavation of the lower pier and the installation of upper and lower piers staggered, unless the design per Section 1817.5 and drawings include explicit methods that will ensure that the installation of lower tiers shall not displace the tiers above.

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