Calculate Box Gutter Size

If a roof s various drainage areas call for different size gutters go for the biggest one k style.

Calculate box gutter size. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Learn more how to storm water design for building sites. Must have a constant slope between 1 40 and 1 200. A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour.

Down pipe must be vertical from sump not to the side minimum sump length is 400mm. Downpipe eaves gutter long straight eaves gutters box gutter to rain water head box gutter vertical faces box gutter side o flow box gutter vertical o flow storm water pipe size storm water network overland flow path spitter upstream end custom rain water head. Then use the chart below to see what size gutter you need. Box gutters must be straight no bends.

6 inch 7 960 square feet. 5 inch standard k style gutter shop 5 gutterbrush. Doubling the number of downspouts halves the required capacity for each. Sizes the depth shown of the box gutter is the depth at the upstream end.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. We recommend using this calculator as a basic tool to begin determining the requirements for your drainage system however all information should be verified by. Sides must be vertical. Size downspouts to fit the gutter.

Roof area the locale s rainfall intensity and gutter capacity determine how many square inches of downspout are needed.