Mobile crane type is various, mainly include:
(1) according to the spreader moving direction is divided into one-way mobile hoist and two-way mobile hoist.The former spreader move only along the dam surface line around;Moving around the latter not only along the dam axis direction and upstream or downstream can also move.
One-way mobile hoist main hoisting mechanism of fastening on the car or portal frame directly in the plane;Two-way mobile hoist main hoisting mechanism set up in the car or portal frame on a flat car, the car along the orbit direction with the car or the movement of the portal frame in vertical direction.Usually also called two-way mobile trolley or portal frame for the big frame.
(2) according to the condition of moving frame is divided into car travelling crane with door form mobile crane (also called gantry crane machine, gantry crane).The former main hoisting mechanism set in the bottom of the walking wheel plane framed the car;Open/close main hoisting mechanism which is set in the portal frame with walking wheels.
Pallet car mobile hoist usually walk on top of gate slot plane or plane above on the concrete frame of door type mobile hoist only walk on top of gate slot plane.Opening and closing of door type door frame leg sometimes set rotary Cantilever hook so that other lifting equipment, which constitute a multi-purpose portal mobile hoist China has production of mobile crane, the main promotion spreader and put 5000 kn, lift is 140 m.Soviet SaYangShu sessions, hydropower station, mobile hoist and put 7100 kn, lift is 17.5 m.

Gn=Rated lifting tonnage     S=span    H=hoisting height