Skyscraper Roof Drainage

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.

Skyscraper roof drainage.

When rain falls onto a flat roof large volumes of water can collect rapidly. They re mostly flat but they re not perfectly flat. This form of roof drainage is preferred if a clean exterior appearance is desired. The drains are usually placed near the center of the building.

The roof is sloped towards the drain through either tapered insulation or through joist modifications. Flat roofs are sensitive architectural areas and it is critical to plan their drainage systems professionally. Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs. Unless there is an effective way of draining off precipitation this can lead to excess loads being placed on the building s structure.

Sizing a roof water drain. The rain flows down these drains which pa. The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout. Also the roof itself may have a smaller slope and still drain properly.

Typically each section of the roof forms a shallow bowl and at the center of each bowl is a drain. If the water on these roofs does not drain fast enough then. This keeps the water safely away from the walls and foundation. The roofs on top of large buildings aren t flat.

The building and walls naturally protect the. Unlike gutter systems inner drains will not freeze up and crack or fail during the winter. These will drain to somewhere near the center of the roof and down through the building to underground storm mains or a detention pond.