Grate is constructed of heavy steel and durable expanded metal. Low profile design allows mowers to pass over easily. Traffic Grate is not load rated.
Designed for use on PVC and CMP. Not designed for use on corrugated plastic tubing.
Grate is designed to fit on the outside of your pipe.
Grate is oversized to accommodate various outside diameters, allowing use on a large variety of pipe manufacturers.
Durable powder coat finish provides years of service.
See website below:
https://www.agridrain.com/shop/c56/grates-standard/p263/30-grate/