Roof drainage calculations to bs en 12056 3 2000 gravity drainage systems inside buildings part 3.
Roof dranage at parapet wall.
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Roof drainage layout and calculation.
Extension shanks are available if required.
The scupper shall be located as determined by the slope and the contributing area of the roof.
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Where required for roof drainage a scupper shall be placed level with the roof surface in a wall or parapet.
Other roof outlets include stainless steel rainwater outlets cast iron rainwater outlets flat roof drainage outlet solutions and brand specific aco roof outlets and caro roof 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.
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.
When using roof rainwater outlets adding leaf and gravel guards is a great way to prevent blockages building up over time.
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.
1514 4 1503 4 2 the scupper shall be located as determined by the roof slope and contributing roof area.
At page top and at left our photos show a low slope roof surrounded by a parapet.
Roof drains for flat or low slope roofs come in a few standard types.
Be placed level with the roof surface in a wall or parapet.
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.
Bs en 12056 3 2000 gives rainfall intensity in litres per second per square meter for a 2 minute storm event.
Is possible to adjust the roof slope and amend the roof drainage to convert to roof scuppers that drain out through a parapet wall to the building exterior eliminating a good part of these clog and leak difficulties.
1514 4 1503 4 2 29 scupper as primary drainage element continued parapet wall roof drainage scupper location shall.