Roof Gutter Drain Pipe Size

Designers specify compliance with bs en 12056 3 2000 that includes a calculation for the allowable capacity of the rainwater pipes.

Roof gutter drain pipe size.

The 6 in 12 pitch factor 1 1 multiplied by 1 000 yields an effective area of 1 100 square feet. 6 inch 7 960 square feet. How do i figure how much each pipe can handle. For the vast majority of rains gutter and downspouts sizes considerably less than recommended will do the job.

For example in the u k. Or less in diameter the piping will be larger in diameter than the roof drain. I plan to use 3 corrugated pipe but would 4 inch be better. For larger roof drains the pipe may be smaller such as a 10 in.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. Primary cause for water spillage is debri in the gutter. I will be collecting water from 2 or 3 downspouts and sending it around the house to the street. A house in chicago has a roof whose actual drainage area is 1 000 square feet.

Most of all is location and your average rainfall during a large downpour. 5 inch 2 500 square feet. Then use the information below to see what size gutter you need. My roof is about 1500 sq ft and this will be draining about half of the roof.

I have enough slope but not sure what size drain pipe to use. Roof drain connected to an 8 in. 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. Problems with gutter sizing.

Many factors can effect the proper size of gutter. For example a 4 in. The flexible design easily bends and holds its shape and can be extended from 25 in. 6 inch 3 840 square feet.

5 inch 5 520 square feet. Roof drain connected to a 6 in. The roof drain or gutter or drain piping or downspout leader size diameter other size constraints e g. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

5 inch 5 520 square feet. 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. Following this logic it is possible that for roof drains 6 in. 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.

Use this downspout extension to divert water away from the foundation or connect to drainage pipe and catch basin to control drainage.