Roof Drain Pipe Size For A 170 Sq Ft Roof

Each drain will carry away is the size of leader therefore increasing leader size decreases the number of drains required.

Roof drain pipe size for a 170 sq ft roof. 1 inch hr. 300 x 500 150 000 sq. Flat roof drainage capacity of a single drain pipe or leader. To convert to an area for use in table 1108 2 do this.

5 inch hr. Rainfall rate inches per hour. The result is the number of drains needed. Divided by the 4 600 sq.

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. 2 inch hr. Calculate total roof area. Sizing a roof water drain.

6 inch hr. The drains should be equally spaced and located symmetrically about the roof. Take the roof s total square footage and divide by the total square footage handled by one drain. Horizontal drain 10 000 sq ft.

Divide total roof area by area found in step 3 to obtain the number of drains required example. Maximum horizontal projected roof area that can be drained in square feet. Following this logic it is possible that for roof drains 6 in. The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout.

Rd rd 10 000 4 x 3 75 9 375 sq ft. Determine the size of leader to be used. 5 19 6 sq in. Or 12 drains required.

Equals 32 6 or 33 drains required. Roof drain connected to a 6 in. For example a 4 in. Canplas frank pattern froet josam marathon mifab miro pipe support modi systems olympic plastic oddities portals plus sioux chief smith thunderbird the vault wade.

Ferguson is the 1 us plumbing supply company and a top distributor of hvac parts waterworks supplies and mro products. Each drain can handle 4 600 sq. 4 inch hr. Pipe cross section drainage area.

4 leader size is selected. 12 500 ft 2. The roof drain typically will not remove the water as fast as you may think. Or less in diameter the piping will be larger in diameter than the roof drain.

Roof area is 300 x 500 ft. Step by step sizing of zurn drains step 1. Wade 3012 roof drain 9 3 4 no hub bowl w ci dome. Froet 100clp nh dual outlet drain low profile.

Sizing data for conventional. 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. The result is a roof collapse. Quick view compare.

Shop for roof drains at ferguson. 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. For larger roof drains the pipe may. Enter table 1108 2 until you find a diameter pipe that will carry 9 375 sq ft.

3 inch hr.