Geared Trolley Trolley Type Geared Maximum Load Capacity 4 000 lb Trolley Frame Material Steel For Beam Shape Flat Tapered For Minimum Beam Flange Width 3 15/32 in For Maximum Beam Flange Width 8 in Headroom to Connecting Shaft 1 5/8 in Headroom to Mounting Point 6 3/32 in For Minimum Beam Height 2 11/16 in For Maximum Beam Height Not Applicable Includes Not Applicable Minimum Radius Curve 4 9/32 in Trolley Wheel Diameter 4 in Trolley Wheel Material Steel