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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.