Trolley Trolley Type Push Maximum Load Capacity 4 000 lb Trolley Frame Material Stamped Steel For Beam Shape Flat Tapered For Minimum Beam Flange Width 3 7/32 in For Maximum Beam Flange Width 6 1/32 in Headroom to Connecting Shaft 9 1/2 in Headroom to Mounting Point 5 1/8 in For Minimum Beam Height 4 in For Maximum Beam Height 4 in Includes Not Applicable Minimum Radius Curve 21 3/4 in Trolley Wheel Diameter 4 2/5 in Trolley Wheel Material Steel