Typical loading standards for trench drains only address the static load or vertical load put on a grate. However, the linear nature of trench drains subject them to forces and loads that point inlets and catch basins are just not subjected to. It is these dynamic loads that typically destroy the integrity of a trench drain.
When considering a Trench Drains for any application, it should also be treated as an assembly (grates, frames, trench conduit). The weakest member in any system is your maximum design load.
Examples of Dynamic Loads
- Turning Forces
- Braking Forces
- Cyclic Loading (high speed repetitive traffic)
- Snow Plows
|Load Class||Load Class||Load Class|
|Application||No Dynamic Load||Low Speed Dynamic||High Speed Cyclic and/or High Speed Dynamic|
|Anchor Frame||Not Required||Independent Anchor Frame||Independent Anchor Frame|
|Preferred Grate Material||ALL ||Ductile Iron ASTM A-536 65-45-12 or 80-55-06||Ductile Iron ASTM A-536 65-45-12 or 80-55-06|
|Grate Anchor Mechanism||Bolted or Toggle||Bolted, Toggle, or Boltless||Boltless or Bolted (if picture framed)|
|Modulus Sandwich||Allowed||Not Allowed||Not Allowed|
|Typical Applications||Walkways, Pedestrian||Local Roadways, Maintenance Garages||Ports, Airports, Highways|