Roof Gutter Downspout Design

This spread sheet will help you calculate the gutter width and maximum distance between downspouts based on your maximum rainfall roof area and style of gutter.

Roof gutter downspout design.

To the design of the roof drainage system. Browse 211 downspout on houzz whether you want inspiration for planning downspout or are building designer downspout from scratch houzz has 211 pictures from the best designers decorators and architects in the country including heartwood builders and grouparchitect. The gutter and downspout size requirement depends upon the number of sections and length of the gutter sections as well as the number of downspouts. The first is to make it wide and deep enough to collect all of the rainwater during the hardest rainfall.

The design roof area is divided by the area of roof shown in table 10a column a2 or b2 see discussion above to give the minimum required area for each downspout. Factors to be considered in the design of roof drainage sys tems are the area to be drained size of gutters downspouts outlets slope of roof type of building and appearance. See more ideas about downspout gutter gutters. 5 inch 5 520 square feet.

Come visit our selection of quality products. You will need to have a downspout for every 20 feet of gutter and turns in the gutter add 1 foot to the total. Roof area to be considered the design capacity for a roof drainage system depends on the quantity of water to be handled. Jan 20 2015 explore angelica muhi jarabe s board gutter design on pinterest.

Look through downspout photos in different colors and styles and when you find some downspout that inspires you save it to. Downspouts should have a cross sectional area of at least 7 square inches except for small areas such as porches and canopies. Capacities of the roof gutter and downspouts shown in this design guide are based on actual measurements taken from some of the materials available. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

Their size should be constant throughout their length. Welcome to gutter supply your online reference for gutters gutter machines gutter guards and accessories. 6 inch 7 960 square feet. Find a place to put the downspouts and mark their location with an o on the design.

Then use the information below to see what size gutter you need. For practical purposes the roof gutter depths and areas used are assumed to hold true for all available gutter of a given style top width and material even though differences do occur. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.