Perfect Transfer Cart: Beam Trolley - Super Heavy Duty 2 Ton (4,000. Select your I-beam trolley from Jervis Webb, the inventors of the modern production line conveyor industry. This I-beam trolley is a 2-ton capacity (4,000 pound) hand pushed trolley and adapts to 6", 8", 10" and 12" tall I-beams. Webb 8363 trolley has a 4,000 pound.