Calculate Box Gutter Size

Sizes the depth shown of the box gutter is the depth at the upstream end.

Calculate box gutter size.

Must have a constant slope between 1 40 and 1 200. 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. A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour. 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.

Learn more how to storm water design for building sites. Sides must be vertical. Then use the chart below to see what size gutter you need. 5 inch 5 520 square feet.

Doubling the number of downspouts halves the required capacity for each. Roof area the locale s rainfall intensity and gutter capacity determine how many square inches of downspout are needed. Down pipe must be vertical from sump not to the side minimum sump length is 400mm. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

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. 5 inch standard k style gutter shop 5 gutterbrush. 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.

Box gutters must be straight no bends.