Roof Drain Overflow Scupper

A primary drainage system is designed to remove water from the roof as quickly as possible.

Roof drain overflow scupper. In short a scupper is a detail that provides drainage to a roof system by allowing the water runoff from the roof to exit the roof through a metal edge parapet wall or through the deck into a downspout or leader not run through the interior of the building. 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 will play one of two roles in a roof system. Cast options ranging from iron to stainless steel.

Scuppers shall not have an opening dimension of less than 4 inches. Scupper building drainage zurn scupper roof drains from zurn manufactures a variety of sizes and finishes. They will either be a part of the primary drainage system or they will be a part of the secondary overflow drainage system. Scupper drain 11 3 4 inches wide x 11 3 4 high x 8 long deep drain opening area with 4 in.