The calculation method of roof gutters

The calculation method of roof gutters
Roofing downpipe layout and roof catchment area size, the maximum hourly rainfall, drainage tube diameter and other factors. Can be calculated by the following formula:
F=438D - /H
Type: F- single catchment area (downpipe allowed level projection area, m)
D- (cm, the square downpipe diameter area can be converted)
H- maximum rainfall per hour (mm/h, provided by the local meteorological department)
In engineering practice, the distance between the roof gutters (gutter water distance) should be 10-15m. When calculating the spacing is greater than the applicable space, should be set according to the applicable distance when calculating the downpipe; spacing is less than the applicable distance, according to the calculation interval setting downpipe.

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