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NYC Plumbing Code

§ 1106.6 — § 1106.6

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What is NYC PC § 1106.6?

Quick Answer

This section specifies the sizing requirements for horizontal roof gutters based on the flow rate from the roof surface. It includes a table detailing the maximum flow rates for various gutter dimensions and slopes. Applies to building owners responsible for 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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1106.6 Size of roof gutters.

PC § 1106.6

Horizontal gutters shall be sized based on the flow rate from the roof surface. The flow rate in horizontal gutters shall not exceed that specified in Table 1106.6. Table 1106.6Horizontal Gutter Sizing Gutter Dimensions a(inches)Slope(inch per foot)Capacity(gpm)Gutter Dimensions a(inches)Slope(inch per foot)Capacity(gpm)1 1/2 × 2 1/21/4261 1/2 × 2 1/21/24041/8392 1/4 × 31/4552 1/4 × 31/28751/8744 × 2 1/21/41063 × 3 1/21/215661/81103 × 51/41573 × 51/222581/1617281/82474 1/2 × 61/43484 1/2 × 61/2494101/16331101/84725 × 81/46514 × 101/21055 For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 gallon per minute = 3.785 L/m, 1 inch per foot = 83.3 mm/m. a. Dimensions are width by depth for rectangular shapes. Single dimensions are diameters of a semicircle.

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