It contains up/down hoisting and left/right traversing building together in the unit. Sometimes has main and secondary hoisting in the unit. Welding of crab frame is using structure steel. A layout of crab trolley is based on available space for an easier maintenance and a safety handrail is included.
Girder's design is based on major standard requirements. It takes safe working load, girder span, application surrounding and class of usage into considerations.
There are two types of cab. One is total enclosed type, the other is semi-enclosed type. Cab can be installed exhaust fan and/or air conditioner upon request.
Generally, we use the flat cable festoon system.