Roof Drain Leader Pipe

Downspouts are usually vertical and usually extend down to ground level.

Roof drain leader pipe.

Reference leader size with hourly rainfall rate to determine roof area drained by each leader chart b. The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout. This is where the rainwater is lead away from the building s foundation so that no rainwater is able to pool around the building. Approximate leader drain pipe size.

Vertical and horizontal storm drain piping shall be sized based on the flow rate through the roof drain. Sizing a roof water drain 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. Use this downspout extension to divert water away from the foundation or connect to drainage pipe and catch basin to control drainage. Featuring durable plastic construction this extension can be buried bent or connected to additional sections.

There is generally a bend of 70 degrees at the bottom. Table 1106 2 storm drain pipe sizing for si. Divide roof area 1 by area per leader 4 to determine the number of drains required. A downspout waterspout downpipe drain spout roof drain pipe leader is a pipe for carrying rainwater from a rain gutter.

Roof drain selection. Downspouts are drainage pipes that direct rain water from the roof to the ground. In general increasing leader size will decrease the number of drains required.