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> PolyDrain > System Design

System Design

The PolyDrain System consist of sloped and non-sloped channels for capturing and transporting the captured surface fluids. Catch basins, vertical discharge adapters, and horizontal end plates provide for easy pipe connection to discharge these fluids from the system. Closed end plates are used to terminate runs. Selection of grates, installation devices and other auxiliary components which aid in the ease of installing the components in this section are covered elsewhere.

Before the system layout can begin, it must be determined if the controlling factor of the system design is hydraulic capacity of the trench or the need for continuous slope in the trench.

If hydraulic capacity is the primary factor, the hydraulic load can be determined using the Hydraulic Design Guide to determine deepest channel required and whether non-sloping channels (neutrals) can be inserted in the run to achieve desired length.

If continuous slope is the primary factor, PolyWalls or multiple discharge points may be required in the system if run length exceeds 30 meters or the flow exceeds the transport capacity of the channels. The system designer should determine if the use of PolyWalls or multiple discharge points is the most cost effective.

Whichever is the determining factor, the run should begin with an appropriate outlet channel (indicated with a down pointing arrow in the System Schematic and work back to the shallow end. If the flow is discharged using a catch basin or horizontal end plate, the discharge channel number should be either 050, 100, 150, 200, 250, or 300.

The System Schematic illustrates the PolyDrain system components and how and where in the system they can be used.