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Construction class I-B.

NYC Admin. Code § 27-276
in effect
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§ 27-276 Construction class I-B. Includes buildings and spaces in which the bearing walls and other major structural elements are generally of three-hour fire-resistance rating.
Source: City of New York, Charter, Administrative Code and Rules (American Legal Publishing XML export, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYCadmin/0-0-0-48802Fetched: 10/24/2026

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27-276 | Corpus