Gantry crane girders form by Category

(A) single girder gantry crane
Single girder gantry crane  simple structure, easy installation, the quality of their small, mostly off-track girder box-shaped frame structure. And double-girder gantry crane compared to the overall stiffness is weaker. Therefore, when the starting weight Q ≤ 50t, span S ≤ 35m, we can use this form. Single girder  bridge gantry crane  doors legs with L-and C-type forms. L-manufacture and installation convenience, the force is good, the quality of their small, but, lifting cargo space through the legs at a relatively small number. The feet made ​​of C-inclined or curved shape, the purpose is to have large lateral space to pass the goods foot.
(2) double-girder gantry crane
Double girder gantry crane carrying capacity, span, overall stability, variety, but the quality of their starting weight with the same single-girder gantry crane compared to the bigger,eot crane the cost is higher. According to the main beam structure is different, can be divided into box girders and trusses in two forms, the current general use more box-shaped structure.