Vertical Leader Roof Drain

Table 1106 2 storm drain pipe sizing slope of horizontal drain pipe size in inches vertical.

Vertical leader roof drain.

The flow rate through vertical leaders shall not exceed that specified in table 1106 3. Square feet that can be drained by one roof leader at the local maximum rainfall rate. Pipe and vertical diameter leaders slope inches per ft. Zurn plumbing products groupspecification drainage operation 1801 pittsburgh avenue erie pa 16502 phone 814 455 0921 fax.

1106 3 vertical leader sizing. Gallons per minute 10 000 x 0312 312 g p m. The flow rate through vertical leaders shall not exceed that specified in table 1106 3. Storm drainage piping g p m.

Table 1106 3 vertical leader sizing for si. This reveals that the minimum size for the leader pipe is 5. Vertical leaders shall be sized based on the flow rates from horizontal gutters or the maximum flow rate through the roof drains. 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.

Inches g p m 1 8 1 4 1 2 flow capacity for storm drainage systems in gallons per minute gallons per hour 10 000 x 1 87 18 700 g p h. Divide the total roof area by the area that one leader will handle. Total roof area 500 by 200. 1 inch 25 4 mm 1 gallon per minute 3 785 l m.

Vertical leaders shall be sized based on the flow rate from horizontal gutters or the maximum flow rate through roof drains. The above result is the number of roof drains required for the building. Figure 7 figure 8 example.