Overflow Scuppers Roofs

The detail shows an alternate method of constructing either type of scupper.

Overflow scuppers roofs.

44 single ply material is not adhered to the inside of the scupper openings. Scuppers shall not have an opening dimension of less than 4 inches. By phil dregger pe rrc frci technical roof services it s a roof consultant s nightmare. Scuppers will play one of two roles in a roof system.

Flat roofs that do not drain over the roof edge and roofs that have parapet walls must utilize roof drains to get the water off the roof. Re roof underway all overflow scuppers are covered. Section 1503 4 2 scuppers 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. The factors which affect proper roof drainage are deck slope drain flashing size and placement of drains.

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. Hydraulic loads from roofs or paved surfaces 1 except as provided in sentence 2 the hydraulic load in litres from a roof or paved surface is the maximum 15 min rainfall determined in conformance with mmah supplementary standard sb 1 climatic and seismic data multiplied by the sum of. The top of the roof side flange is extended into a masonry joint. The sides of the flange are sealed against the masonry.

An overflow drainage system will be designed to function independently of the primary system to drain water from the roof. The ontario building code hydraulic loads from roofs or paved surfaces 7 4 10 4. Right after an especially intense rain you get a call. 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.

On the roof side overflow scuppers can be detailed similar to detail 10 5d. The scupper is locked and soldered to the closure flange on all sides. The owner of a building for whom you prepared re roof documents for informs you that part of their roof just collapsed and initial reports are that not only were the overflow scuppers covered the primary scupper drain was found to be. Wind billows the loose material effectively closing.

Home articles overflow drains and scuppers roof drainage. Overflow drains and scuppers roof drainage.