Container gantry crane manufacturer introduction: single main beam gantry crane and double main beam gantry crane: single main beam introduction including simple structure, easy to manufacture and installation, its own mass is small, the main beam is mostly biased rail box frame structure. Compared with the double girder gantry crane, the overall stiffness is weaker. Therefore, when the lifting weight Q≤ 50T, span S≤35m, this form can be adopted. Single main beam gantry crane door leg has two forms: L type and C type. L type is easy to manufacture and install, with good force and small mass. However, the space for lifting goods through the leg is relatively small. The legs of Type C are inclined or bent in order to allow more lateral space for cargo to pass through the legs.
The double girder portal crane includes strong bearing capacity, large span, good overall stability and many varieties, but its own mass compared with the same weight of the single main girder portal crane is larger, the cost is also higher. According to the structure of the main beam, it can be divided into two forms: box beam and truss. Generally, the box structure is adopted.