Electric Chain Hoist Duty Classification H4 Mount Type Motorized Trolley Maximum Lifting Capacity 20 000 lb Number of Speeds 1 Programmable Non-Programmable Fixed Lift Speed 11 fpm Minimum Lift Speed Not Applicable Maximum Lift Speed Not Applicable Trolley Speed 40 fpm Maximum Lifting Length 10 ft Current at Minimum Voltage 5.1 A Current at Maximum Voltage 1.7 A Motor Horsepower 4 3/4 hp Operating Voltage 208-230/460V AC Headroom 46 1/2 in For Minimum Beam Height 6 29/32 in