Be placed level with the roof surface in a wall or parapet.
Roof dranage at parapet wall.
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These corner units can be fitted to either vertical downpipes at the edge of the retaining wall or on a horizontal plane through the upstand or wall to then connect to the external downpipe.
Roof drains for flat or low slope roofs come in a few standard types.
At page top and at left our photos show a low slope roof surrounded by a parapet.
This concept would hold true regardless of the distance of the roof drain from the parapet wall provided the aggregate measurement remained the same proportionately at both ends of the new drainage cricket e g.
The scupper shall be located as determined by the slope and the contributing area of the roof.
Bs en 12056 3 2000 gives rainfall intensity in litres per second per square meter for a 2 minute storm event.
Roof drainage layout and calculation.
Where required for roof drainage a scupper shall be placed level with the roof surface in a wall or parapet.
The shank itself is 500mm long so it can cross through a large section of wall.
Extension shanks are available if required.
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When using roof rainwater outlets adding leaf and gravel guards is a great way to prevent blockages building up over time.
Click the links to discover flat roof drainage outlet products such as cast aluminium outlets tpo outlets and stainless steel outlets.
The best type for the application depends on several factors such as the size and slope of the roof the desired appearance and how much regular maintenance the drain system might need.
Roof drainage calculations to bs en 12056 3 2000 gravity drainage systems inside buildings part 3.
1514 4 1503 4 2 the scupper shall be located as determined by the roof slope and contributing roof area.
The exterior facing or lining of a scupper if metal.
If the drain was set at the dimension of 1 2 m 4 ft from the near corner of the outer perimeter parapet wall then the cricket at the far corner of the outer perimeter parapet wall.
1514 4 1503 4 2 29 scupper as primary drainage element continued parapet wall roof drainage scupper location shall.