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NYC Building Code

§ 1503.4.2 — § 1503.4.2

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What is NYC BC § 1503.4.2?

Quick Answer

This section outlines the requirements for scuppers used for secondary roof drainage, specifying that their size, quantity, location, and inlet elevation must prevent ponding water from exceeding design limits as per Section 1611.1. Applies to building owners managing roof drainage systems.

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

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1503.4.2 Scuppers.

BC § 1503.4.2

When scuppers are used for secondary (emergency overflow) roof drainage, the quantity, size, location and inlet elevation of the scuppers shall be sized to prevent the depth of ponding water from exceeding that for which the roof was designed as determined by Section 1611.1. Scuppers shall not have an opening dimension of less than 4 inches (101.6 mm). The flow through the primary system shall not be considered when locating and sizing scuppers.

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