Calculate Box Gutter Size

A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour.

Calculate box gutter size.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. Then use the chart below to see what size gutter you need. 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. Measure your gutter across the top from the back where the gutter meets the home to the outer edge.

Size downspouts to fit the gutter. Box gutters must be straight no bends. 5 inch standard k style gutter shop 5 gutterbrush. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

Sides must be vertical. Northclad gutter size requirement calculator this calculator uses current data to calculate the required size of gutter as well as number and size of downspouts based on your input. Learn more how to storm water design for building sites. Sizes the depth shown of the box gutter is the depth at the upstream end.

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. Must have a constant slope between 1 40 and 1 200. 5 inch 5 520 square feet. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.

6 inch 7 960 square feet.