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NYC Building Code

§ 1812.8.6 — § 1812.8.6

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What is NYC BC § 1812.8.6?

Quick Answer

This section outlines the requirements for installing micropiles with a pressure grouted bond zone, specifying that the bond zone must be in soil of Class 4 or better. The statute mandates that grout be placed under pressure exceeding 1.5 times the existing total stress at the midpoint of the bond zone. Applies to building owners involved in micropile installation.

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

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1812.8.6 Pressure grouted bond zone.

BC § 1812.8.6

Micropiles shall be installed with a pressure grouted bond zone. The bond zone shall be formed entirely in soil of Class 4 or better and the grout shall be placed under pressure exceeding 1.5 times the existing total stress at the midpoint of the bond zone. The bond zone shall be formed by extending the casing to the bottom of the bond zone and withdrawing the casing while the grout is being pumped under pressure. The casing above the bond zone shall remain in place permanently. Reinforcing to the bond zone shall be placed in the casing to the depth of the bond zone prior to placing grout.

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