Roof Drain Pipe Size For A 170 Sq Ft Roof

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Roof drain pipe size for a 170 sq ft roof.

Step by step sizing of zurn drains step 1. Horizontal drain 10 000 sq ft. 5 19 6 sq in. The result is a roof collapse.

12 500 ft 2. Sizing data for conventional. Each drain will carry away is the size of leader therefore increasing leader size decreases the number of drains required. 2 inch hr.

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. Flat roof drainage capacity of a single drain pipe or leader. Each drain can handle 4 600 sq. 3 inch hr.

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. Shop for roof drains at ferguson. Roof area is 300 x 500 ft. Enter table 1108 2 until you find a diameter pipe that will carry 9 375 sq ft.

Rainfall rate inches per hour. Divided by the 4 600 sq. Or less in diameter the piping will be larger in diameter than the roof drain. Sizing a roof water drain.

Or 12 drains required. The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout. 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. 300 x 500 150 000 sq.

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. Wade 3012 roof drain 9 3 4 no hub bowl w ci dome. For example a 4 in. To convert to an area for use in table 1108 2 do this.

Pipe cross section drainage area. Equals 32 6 or 33 drains required. The drains should be equally spaced and located symmetrically about the roof. Maximum horizontal projected roof area that can be drained in square feet.

For larger roof drains the pipe may. Following this logic it is possible that for roof drains 6 in. Divide total roof area by area found in step 3 to obtain the number of drains required example. Rd rd 10 000 4 x 3 75 9 375 sq ft.

Calculate total roof area. 6 inch hr. 1 inch hr. 50 000 4 400 11 36.

Determine the size of leader to be used. The result is the number of drains needed. The roof drain typically will not remove the water as fast as you may think. Take the roof s total square footage and divide by the total square footage handled by one drain.

Quick view compare. Quick view compare choose options. 4 inch hr. 5 inch hr.

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