Roof Gutter Drain Pipe Size

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.

Roof gutter drain pipe size.

For example in the u k. The roof drain or gutter or drain piping or downspout leader size diameter other size constraints e g. Or less in diameter the piping will be larger in diameter than the roof drain. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

For the vast majority of rains gutter and downspouts sizes considerably less than recommended will do the job. 5 inch 5 520 square feet. I plan to use 3 corrugated pipe but would 4 inch be better. Smacna s new downspout and gutter sizing calculator enables the user to manually enter the design area of the roof or use the design area wizard for the calculation.

How do i figure how much each pipe can handle. Most of all is location and your average rainfall during a large downpour. Many factors can effect the proper size of gutter. The flexible design easily bends and holds its shape and can be extended from 25 in.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Following this logic it is possible that for roof drains 6 in. Primary cause for water spillage is debri in the gutter. The 6 in 12 pitch factor 1 1 multiplied by 1 000 yields an effective area of 1 100 square feet.

A house in chicago has a roof whose actual drainage area is 1 000 square feet. If a roof s various drainage areas call for different size gutters go for the biggest one k style. For example a 4 in. Roof drain connected to an 8 in.

Use this downspout extension to divert water away from the foundation or connect to drainage pipe and catch basin to control drainage. I have enough slope but not sure what size drain pipe to use. I will be collecting water from 2 or 3 downspouts and sending it around the house to the street. For larger roof drains the pipe may be smaller such as a 10 in.

6 inch 7 960 square feet. 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 5 520 square feet. Problems with gutter sizing.

6 inch 3 840 square feet. Then use the information below to see what size gutter you need. Roof drain connected to a 6 in. My roof is about 1500 sq ft and this will be draining about half of the roof.

5 inch 2 500 square feet.