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The published roof drain flow rate, based on the head of water above the roof drain, shall be used to size the storm drainage system in accordance with Section 1106. The flow rate used for sizing the storm drainage piping shall be based on the maximum anticipated ponding at the roof drain.

Related Code Sections

1105.2 Storm Drainage, Roof Drain Flow Rate
The published roof drain flow rate, based on the head of water above the roof drain, shall be used to size the storm drainage system in accordance ...
1105.2 Storm Drainage, Roof Drain Flow Rate
The published roof drain flow rate, based on the head of water above the roof drain, shall be used to size the storm drainage system in accordance ...
1106.2 Storm Drainage, Size of Storm Drain Piping
Vertical and horizontal storm drain piping shall be sized based on the flow rate through the roof drain. The flow rate, as calculated ...
1106.3 Storm Drainage, Vertical Leader Sizing
Vertical leaders shall be sized based on the flow rate from horizontal gutters or the maximum flow rate through roof drains. The flow rate through ...
Section 1106 Storm Drainage, Size of Conductors, Leaders and Storm Drains
shall be sized based on the flow rate through the roof drain. The flow rate in storm drain piping shall not exceed that specified in Table 1106.2 ...