Gallons Per Square Foot Of Roof

Max area of roof draining to one down.

Gallons per square foot of roof.

Where rainfall rate is expressed in inches per hour and roof area is given in square feet. Of water 231 sq in. Sq ft safe for maximum rainfall reduce by 10 per 90 degree turn. For example a 3 inch per hour rainfall will build up to a 3 inch depth on a flat roof in one hour at the rate of 1 87 gallons per hour sq.

Up to 6 12 7 12 8 12. 4 ft 2. Take the dimensions of the footprint of your roof and convert them to inches. Using a 10 000 sq.

5 ft 2. To calculate the runoff from any given rainfall. Take a guess what is the volume of water that runs off a 1 000 square foot roof during a 1 rain storm. Code to add this calci to your website.

The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area. The answer is about 623 gallons. Of water in a gallon 0 623 gallons per hour. 1 us gallon 231 cubic inches.

Roof area square feet per linear ft of gutter underneath. Converting this to gallons per minute per square foot gpm ft 2. 1 inch of rainfall in an hour will cover 1 sq ft. Or 0312 gallons per minute sq.

Rainwater can be collected from the roofs using the rain water harvesting method.