Motorized Trolley Maximum Load Capacity 7 480 lb Number of Speeds Variable Trolley Speed 2 to 80 fpm Operating Voltage 480V AC For Beam Shape Flat Tapered For Minimum Beam Flange Width 3 7/32 in For Maximum Beam Flange Width 12 3/16 in Headroom to Connecting Shaft 2 1/2 in Headroom to Mounting Point 34 mm Trolley Frame Material Cast Aluminum Phase 3 For Minimum Beam Height 24 in For Maximum Beam Height 24 in Includes DSE-CS Push Button Pendant Trolley Wheel Material Cast Iron