Electric Chain Hoist Duty Classification H4 Mount Type Motorized Trolley Maximum Lifting Capacity 20 000 lb Number of Speeds 2 Programmable Programmable by VFD Fixed Lift Speed Not Applicable Minimum Lift Speed 2 fpm Maximum Lift Speed 5.5 fpm Trolley Speed 40 fpm Maximum Lifting Length 20 ft Current at Minimum Voltage 10.8 A Current at Maximum Voltage 1.7 A Motor Horsepower 4 3/4 hp Operating Voltage 460V AC Headroom 46 1/2 in For Minimum Beam Height 6 29/32 in