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.

Take a guess what is the volume of water that runs off a 1 000 square foot roof during a 1 rain storm. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall. Converting this to gallons per minute per square foot gpm ft 2. 1 us gallon 231 cubic inches.

The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area. Or 0312 gallons per minute sq. To calculate the runoff from any given rainfall. The answer is about 623 gallons.

Rainwater can be collected from the roofs using the rain water harvesting method. To a depth of 1 in 1 hour. Max area of roof draining to one down. Of water 231 sq in.

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. 1 inch of rainfall in an hour will cover 1 sq ft. 4 ft 2. Using a 10 000 sq.

5 ft 2. Where rainfall rate is expressed in inches per hour and roof area is given in square feet. Sq ft safe for maximum rainfall reduce by 10 per 90 degree turn. Take the dimensions of the footprint of your roof and convert them to inches.

Roof area square feet per linear ft of gutter underneath.