Jervis Webb Beam Trolley With Side Guide Rollers. Heavy Duty 3/4 Ton 1,500 Pounds Capacity. Industrial Grade Conveyor Trolley for I-Beams and Chain Hoists Industrial grade I-Beam Trolley as used in automotive assembly plants. Rugged Cast Iron body construction Made in the USA by Jervis B Webb, the "gold standard" for heavy duty conveyors and hoist trolleys Side guide rollers help hoist trolley glide smoothly, traverse corners and prevent unnecessary wear on track. 2D and 3D CAD models available for engineers and designers. Jervis Webb Hand Push Hoist Trolleys also available in 1/4 ton, 1 ton and 2 ton models. All models are heavy duty cast iron construction - not welded garage-style push trolleys Adapts to 4", 5" and 6" tall I-beams (measure top flange to bottom flange). Safety first! Check application requirements if you have questions. Separate lower attachment holes to attach secondary safety cables or additional load control fasteners.