Roof Gutter Downspout Design

Jan 20 2015 explore angelica muhi jarabe s board gutter design on pinterest.

Roof gutter downspout design.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. There are two major factors to consider when deciding a gutter design. This wizard makes it easy to calculate the roof design area by providing various shape calculations and the calculation for vertical walls area per international plumbing code ipc. 6 inch 7 960 square feet.

Downspouts should have a cross sectional area of at least 7 square inches except for small areas such as porches and canopies. Welcome to gutter supply your online reference for gutters gutter machines gutter guards and accessories. You will need to have a downspout for every 20 feet of gutter and turns in the gutter add 1 foot to the total. Capacities of the roof gutter and downspouts shown in this design guide are based on actual measurements taken from some of the materials available.

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. See more ideas about downspout gutter gutters. 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. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

The most common location for the downspouts is the corners of the house since it is easier to move the water away from the house there. Come visit our selection of quality products. 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. 5 inch 5 520 square feet.

Then use the information below to see what size gutter you need. Find a place to put the downspouts and mark their location with an o on the design. 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. Roof area to be considered the design capacity for a roof drainage system depends on the quantity of water to be handled.

Their size should be constant throughout their length. The first is to make it wide and deep enough to collect all of the rainwater during the hardest rainfall. 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.