Trolley Trolley Type Push Maximum Load Capacity 4 000 lb Trolley Frame Material Cast Iron For Beam Shape Flat For Minimum Beam Flange Width 3 5/8 in For Maximum Beam Flange Width 8 in Headroom to Connecting Shaft 5 21/32 in Headroom to Mounting Point 1 15/16 in For Minimum Beam Height 6 in For Maximum Beam Height 24 1/2 in Includes Hanger Plate Hanger Shaft Washers Minimum Radius Curve 39 3/8 in Trolley Wheel Diameter 3 3/10 in Trolley Wheel Material Steel