Double girder gantry crane carrying capacity, span, good overall stability, variety, but the quality of their starting weight compared with the same single-girder gantry crane to be bigger, the cost is higher.electromagnet overhead crane Depending on the main beam structure, it can be divided into box beams and trusses in two forms. More commonly used box structure.
1, hook single girder gantry crane project is mainly applied to roads, bridges, power plants, factories and other construction, general handling and lifting handling operations.
2, the whole truss structure, light weight, wheel pressure is small, reliable performance.
3, the machine uses a single main beam, main beam on both sides of the car under the rope, lifting the shape of larger items.

double girder gantry Crane Category

Crane means within a certain range vertical lifting and carrying heavy loads of horizontal multi-action lifting machinery. Also known as cable car. At present, the major heavy lifting equipment Ltd. Guangdong Shun launch has gradually canceled hoist with function. The main features of terrains are: its driving cab and crane cab combined, is evolved by the crawler crane (crawler), will track and walking part of the running gear bracket into the chassis has a tire to overcome disadvantage of ship gantry crane crawler crane (crawler crane) track shoes on pavement damage, belonging to material handling machinery. Lifting equipment to do some work is characterized by intermittent exercise, namely a working cycle Reclaimer, transport, unloading and other movements of the respective agencies are working alternately, development and use of cranes on the market more widely. Because they are not leg slings and hoists with often some accident, driving speeds are more cranes (crawler) fast; job stability, lifting capacity, can hoist walking within a specific range, but must ensure that road smooth solid tire pressure to meet the requirements, hanging above the ground shall not exceed 50CM; ban with a load of walking long distances. To ensure the safety of operations, the current domestic basically prohibit the outriggers are not hoisting operations.

Tower crane safety management knowledge

overhead bridge cranesAs the crane practitioners, in addition to playing a "mainstay" role in building construction, but also an important part of safe production. According to long-term service crane driver, commander summed up the crane driver safety fifteen issues, hoping for crane training helpful.
1, as a crane driver, the body must be healthy, two should maintain good eyesight, no color blindness, hearing no sensitive ears. Must pass safety training, special operations personnel to obtain operating permits before an independent operation.2. There must be sensitive crane hook, rope drum, broken rope safety device, you must have a valid ultra limit, amplitude limit, walking limit, torque limiter, the cab lifting limit, etc., up the ladder should retainer.electric wire rope hoist manufacturer3, the crane driver must be familiar with the operation of the crane's performance structure, operating according to the relevant provisions of the crane is prohibited illegal operations. Should be familiar with the mechanical maintenance, repair knowledge, according to the provisions of the machinery for routine maintenance. It is particularly worth mentioning is that the crane used during maintenance of its useful life should also check out the specification and compliance departments.
4, the crane driver before the job should lift rail tongs, remove obstacles on the track, tighten the screws good plywood; try hanging should be checked before use.
5, crane personnel when the job should be open cab window, pay attention to traffic signals; cab heating in winter, there should be fire, electric shock measures.