How To Size Box Gutters

5 inch 5 520 square feet.

How to size box gutters.

For square footage up to 3 840 feet 1 170 m use 6 in 15 cm half round gutters. 6 inch 7 960 square feet. Then use the information below to see what size gutter you need. Box gutters must be straight no bends.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. 6 inch 7 960 square feet. Choose the size that corresponds with the adjusted square footage. 5 inch 5 520 square feet.

If the adjusted square footage is equal to or less than 2 500 feet 760 m choose 5 in 13 cm half round gutters. Then use the chart below to see what size gutter you need. Down pipe must be vertical from sump not to the side minimum sump length is 400mm. Pick any size box gutter that fits on the relevant graph and determine the depth and the rain water head sizes.

Calculate the necessary scaling factors to scale these dimensions to the flow we want. While a smaller commercial building might be able to get away with 5 inch box gutters we generally recommend that you start by looking at the 6 inch sizes. Must have a constant slope between 1 40 and 1 200. Sides must be vertical.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. If a roof s various drainage areas call for different size gutters go for the biggest one k style. Sizes the depth shown of the box gutter is the depth at the upstream end.