Gallons Per Square Foot Of Roof

Roof area square feet per linear ft of gutter underneath. Max area of roof draining to one down. Code to add this calci to your website.

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To calculate the runoff from any given rainfall.

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. The answer is about 623 gallons. 5 ft 2. The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area.

Sq ft safe for maximum rainfall reduce by 10 per 90 degree turn. Rainwater can be collected from the roofs using the rain water harvesting method. 1 inch of rainfall in an hour will cover 1 sq ft. Where rainfall rate is expressed in inches per hour and roof area is given in square feet.

Take the dimensions of the footprint of your roof and convert them to inches. Using a 10 000 sq. Or 0312 gallons per minute sq. To a depth of 1 in 1 hour.

Roof area the 3 inch rainfall will produce 18 700 gallons in one hour at the rate of 312 gallons per minute. Of water in a gallon 0 623 gallons per hour. 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. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall.

Up to 6 12 7 12 8 12. Converting this to gallons per minute per square foot gpm ft 2. 1 us gallon 231 cubic inches. 4 ft 2.

Of water 231 sq in.

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