Skyscraper Roof Drainage

Sizing a roof water drain.

Skyscraper roof drainage.

The roofs on top of large buildings aren t flat. Typically each section of the roof forms a shallow bowl and at the center of each bowl is a drain. Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs. Unlike gutter systems inner drains will not freeze up and crack or fail during the winter.

This form of roof drainage is preferred if a clean exterior appearance is desired. They attach to pipes that drain the water down through the building s roof. Unless there is an effective way of draining off precipitation this can lead to excess loads being placed on the building s structure. Also the roof itself may have a smaller slope and still drain properly.

If the water on these roofs does not drain fast enough then. They re mostly flat but they re not perfectly flat. The first step in sizing a roof drain is to calculate the surface area of the roof that the drains will be covering as well as the average hourly rainfall rate at the building location. This keeps the water safely away from the walls and foundation.

Benefits of wavin quickstream siphonic roof drainage include smaller pipe dimensions fewer roof outlets and downpipes and reduced installation costs. A building with a large roof footprint such as an airport mall warehouse convention centre or factory is well suited to a siphonic system because the weight of water on these buildings is a bigger concern. These will drain to somewhere near the center of the roof and down through the building to underground storm mains or a detention pond. The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout.

The rain flows down these drains which pa. The building and walls naturally protect the. Flat roofs are sensitive architectural areas and it is critical to plan their drainage systems professionally.