Gallons Per Square Foot Of Roof

Roof area the 3 inch rainfall will produce 18 700 gallons in one hour at the rate of 312 gallons per minute.

Gallons per square foot of roof.

4 ft 2. Converting this to gallons per minute per square foot gpm ft 2. Of water in a gallon 0 623 gallons per hour. Max area of roof draining to one down.

Or 0312 gallons per minute sq. 1 inch of rainfall in an hour will cover 1 sq ft. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall. 1 us gallon 231 cubic inches.

To calculate the runoff from any given rainfall. The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area. Of water 231 sq in. Up to 6 12 7 12 8 12.

Sq ft safe for maximum rainfall reduce by 10 per 90 degree turn. Using a 10 000 sq. Code to add this calci to your website. 5 ft 2.

Take a guess what is the volume of water that runs off a 1 000 square foot roof during a 1 rain storm. The answer is about 623 gallons. Rainwater can be collected from the roofs using the rain water harvesting method. 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.

To a depth of 1 in 1 hour.