How to choose the gantry lift hoist

   Gantry  lift hoist  s a lift hoist in the most common form, is mainly used for outdoor yard, yard goods, bulk cargo loading and unloading operations. Its metal structure shaped like a door frame, bearing girder installed under two feet directly in the ground walking on the tracks, you can have both ends of the main beam overhanging cantilever.
      Gantry  lift hoist  according to the structure and use of a variety of categories, according to the door frame structure can be divided into: Full gantry cranes, semi-gantry  lift hoist  , double cantilever gantry crane, single cantilever gantry  lift hoist   according to press girder structure of : single girder gantry lift hoist, double girder bridge crane, according to use can be divided into: ordinary gantry lift hoists, gantry cranes hydropower stations, shipbuilding gantry lift hoists, container gantry cranes. Well, according to the need to use a different choice of gantry lift hoists how it
1, single girder and double girder gantry lift hoist used
Under normal circumstances, from the weight of 50t or less, in the span of less than 35m, no special requirements, should choose to use a single main beam. If you require a large gate leg width, high working speed, or frequently lifting heavy pieces, grew up pieces, you should choose double girder gantry crane.
2, span, and boom length
Span gantry crane crane itself is affecting the quality of the important factors. Selection, to meet the conditions of use and  Hoist equipment  conform span series of standards under the premise of the span should be minimized.
3, to determine the principles of Tread
(A) along a gantry lift hoist to meet stability requirements of the track direction;
 (B) the dimensions of the goods to be able to pass the legs flat steel;
 (C) pay attention to the track B and the span S proportional relationships, and generally track B = (1/4-1/6) S.
4, gantry lift hoists pitch size determination
At work, gantry lift hoists and yard external dimensions of goods and transport vehicles between channels should leave some space dimensions, in order to facilitate loading and unloading operations. General transport vehicles in the span of loading and unloading, should be kept above the door legs with 0.7m spacing. Spreader should not work with the transport vehicles with more than 0.5m spacing, cargo interlude legs, there should be more than 0.5m spacing.