Beam Trolley - Super Heavy Duty 2 Ton (4,000 Pounds Capacity) Jervis Webb Industrial Grade Hand Push Conveyor Trolley for I-beams / Chain Hoists. Industrial grade for production conveyor systems. Rugged Cast Iron body construction for severe service applications. As used in car assembly plants. Made in the USA by Jervis B Webb, the "gold standard" for heavy duty conveyor components. Adapts to 6", 8", 10" and 12" tall I-beams (measure top flange to bottom flange). Add a chain hoist to easily lift heavy items. Also available in 1/4 ton, 3/4 ton and 1 ton models Side rollers prevent unnecessary wear on track. Webb trolleys slide smoothly even with extreme load