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NYC Building Code

§ 918.8.1 — § 918.8.1

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What is NYC BC § 918.8.1?

Quick Answer

This section establishes activation thresholds for gas detection systems, specifying that alarms must trigger when flammable gases exceed 25 percent of the lower flammability limit and nonflammable gases exceed half of the immediately dangerous to life and health concentration. Applies to building owners with gas detection systems installed.

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

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918.8.1 Activation thresholds.

BC § 918.8.1

A gas detection system alarm shall be initiated when a sensor detects a concentration of gas exceeding the following thresholds unless otherwise specified in this code or the New York City Fire Code: 1. For flammable gases, a gas concentration exceeding 25 percent of the lower flammability limit (LFL).

2.For nonflammable gases, a gas concentration exceeding one-half of the immediately dangerous to life and health (IDLH) concentration.

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