Roof Sqaure Footage Per Area Drain And Dwonspout

5 inch 5 520 square feet.

Roof sqaure footage per area drain and dwonspout. There are 5 easy steps to figure out how many drains your commercial roofing project will need. Max area of roof draining to one down. For most homes this means installing spouts at either end of a gutter section. How many downspout installations should your gutters have.

6 inch 7 960 square feet. If a roof s various drainage areas call for different size gutters go for the biggest one k style. After you have calculated the square footage use following calculations. According to the chart for 1 8 slope per 12 of pipe for 5 000 square feet of roof area with a 6 per hour of rainfall the required pipe size is 8.

A house in chicago has a roof whose actual drainage area is 1 000 square feet. 6 inch 3 840 square feet. To do that simply multiply drainage area calculated earlier by roof pitch factor and rainfall intensity. Roof area the locale s rainfall intensity and gutter capacity determine how many square inches of downspout are needed.

To size the vertical roof drain for the same parameters 5 000 square feet of room area and 6 per hour of rain consult table 1106 2 figure 3. 5 inch 2 500 square feet. If we have to sum it up in a single rule gutters need a downspout around every 30 to 40 feet. Calculate total roof area.

A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour. We have rounded smith s data and comment further below. Doubling the number of downspouts halves the required capacity for each. Calculate the total roof area by multiplying its length by width.

Determine leader or pipe size. Gutters come in a wide range of materials the cost depends on which you choose. Adapted from smith 2014 cited below. Two hundred feet of gutter can cost anywhere between 660 and 4 500.

Maximum horizontal projected roof area that can be drained in square feet. For a 5 inch k style gutter the square footage should be up to 5 500 sq ft and for a 6 inch k style gutter the square footage should be upto 7 900 sq ft. Metal gutters vary in price from 6 to 12 for aluminum and 9 to 20 for steel to 25 or more for high end copper.