FeaturesDesigned for driveways, parking lots and off-roadway applications where subject to occasional non-deliberate traffic by heavy vehiclesLoadings for HH covers comply with all test provisions of ANSI/ SCTE 77 except that the vertical design load is 22,500 lbs with a test load of 33,750 lbsFor any application requiring easy access to an underground service, stackable for increased depth, straight sides for easy adjustment of box to grade