Roof Drain Pipe Size For A 170 Sq Ft Roof

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Roof drain pipe size for a 170 sq ft roof.

Roof area is 300 x 500 ft. Froet 100clp nh dual outlet drain low profile. Canplas frank pattern froet josam marathon mifab miro pipe support modi systems olympic plastic oddities portals plus sioux chief smith thunderbird the vault wade. An 8 inch diameter pipe on 1 4 inch per foot slope will carry 16 300 sq ft but a 6 inch will carry only 7 550 sq ft therefore use.

The result is a roof collapse. To convert to an area for use in table 1108 2 do this. Rainfall rate inches per hour. The first step in sizing a roof drain is to calculate the surface area of the roof that the drains will be covering as well as the average hourly rainfall rate at the building location.

Horizontal drain 10 000 sq ft. 2 inch hr. Divide total roof area by area found in step 3 to obtain the number of drains required example. Flat roof drainage capacity of a single drain pipe or leader.

The drains should be equally spaced and located symmetrically about the roof. Divided by the 4 600 sq. 5 19 6 sq in. Maximum horizontal projected roof area that can be drained in square feet.

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. Pipe cross section drainage area. Step by step sizing of zurn drains step 1. 6 inch hr.

4 leader size is selected. Determine the size of leader to be used. Calculate total roof area. The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout.

Take the roof s total square footage and divide by the total square footage handled by one drain. Each drain will carry away is the size of leader therefore increasing leader size decreases the number of drains required. Each drain can handle 4 600 sq. Following this logic it is possible that for roof drains 6 in.

Quick view compare choose options. Or less in diameter the piping will be larger in diameter than the roof drain. 5 inch hr. 300 x 500 150 000 sq.

4 inch hr. 3 inch hr. Shop for roof drains at ferguson. 12 500 ft 2.

The roof drain typically will not remove the water as fast as you may think. Ferguson is the 1 us plumbing supply company and a top distributor of hvac parts waterworks supplies and mro products. 50 000 4 400 11 36. Or 12 drains required.

Rd rd 10 000 4 x 3 75 9 375 sq ft. The result is the number of drains needed. Wade 3012 roof drain 9 3 4 no hub bowl w ci dome. Roof drain connected to a 6 in.

For larger roof drains the pipe may. 1 inch hr. For example a 4 in. Enter table 1108 2 until you find a diameter pipe that will carry 9 375 sq ft.

Sizing a roof water drain.