They will either be a part of the primary drainage system or they will be a part of the secondary overflow drainage system a primary drainage system is designed to remove water from the roof as quickly as possible.
Roof drains or scuffers.
This will never clog up with leaves.
This is a small flat roof with a wide mouth 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.
Scuppers will play one of two roles in a roof system.
This is the best type of scuppers because it has a wide opening to allow debris to wash off during a good rain.
The full flow capacity of a drain is not realized until the water reaches approximately 2 5 inches above the inlet in a four inch drain and 3 5 inches in a six inch drain.
The roof is sloped toward the scuppers and water simply drains out through the scuppers.
Scupper drain 11 3 4 inches wide x 11 3 4 high x 8 long deep drain opening area with 4 in.
The best draining system for a flat roof.
Scupper roof drains from zurn manufactures a variety of sizes and finishes.
The factors which affect proper roof drainage are deck slope drain flashing size and placement of drains.
Cast options ranging from iron to stainless steel.
E there is at least one drain for each 900 m 2.
A roof scupper is a roof drainage system that provides drainage of a flat roof 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.
3 where the height of the parapet is more than 150 mm or exceeds the height of the adjacent wall flashing a emergency roof overflows or scuppers described in clause 2 c shall be provided and b there shall be a minimum of two roof drains.
Scuppers are commonly used on flat roofs that have a parapet or other type of perimeter barrier enclosing the roof.
Scuppers are open holes or channels cut into the roof edge or parapet.
Scuppers are roof drains on the edge of the roof.