Usually the trench drain reaches hydraulic capacity before grate intake hydraulics affect performance. However, occasionally grate hydraulics become the determining factor, particularly if catchment slopes are large and catchment run-off is high.
To determine grate performance, the following information is required;
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Lateral inflow rate |
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Pavement type |
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Geometry of catchment area including slope approaching the grate |
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100% Capture
All liquid flowing through grate |
Less than 100% Capture
Not all liquid flowing through grate - bypass has occurred. Could be due to not enough grate clear opening, too much liquid, or too much slope perpendicular to grate
ACO provides a complimentary service for grate intake hydraulics. Click here for details. |