This diagram details the storm drainage and overflow drainage riser configuration for high roof areas. Vertical piping is sized at 4-inch diameter typically, connecting to roof drains with designated drainage areas of 355 square feet, 966 square feet, 1562 square feet, and 2154 square feet. Horizontal collector mains transition to 6-inch storm drainage and overflow piping. Drain tags and flow direction arrows are provided throughout the riser network.
SD 5 SD SD 14 OD 14 6"SD 4"SD 4"OD SD 15 SD OD 6"OD OD 15 SD 42 SD 33 1562 SF 2154 SF 966 SF 355 SF 4"Ø 4"Ø 4"Ø TYP.
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