- Home
- Load Recommendation Guide - Source 1 Drainage
CLASS A
- Loads of 1 - 60 psi.
- Recommended for pedestrian, bicycles and wheel chair traffic.
CLASS B
- Loads of 61 - 175 psi.
- Recommended for medium-duty pneumatic tire traffic, autos and light trucks at
speeds less than 20 mph.
CLASS C
- Loads of 176 - 325 psi.
- Recommended for heavy-duty pneumatic tire forklifts and tractor trailers at
speeds less than 20 mph, H-20 rated.
CLASS D
- Loads of 326 - 575 psi.
- Recommended for heavy-duty hard tire forklifts at speeds less than 20 mph,
H-20 rated.