Gantry crane in outstretched arms and columns

Calculation  gantry crane  arm outstretched limb and pillars lever force, assuming outstretched arms stretched out to the maximum radius of the situation and with the most simple graphical method in order to achieve it. Outstretched arm pillar Weight Weight G1 and G2 assuming distributed in its adjacent section head, load Q forces G1 / 2, as well as cable tension in the extended arm tip synthesized a force on stilts translated into force of these forces, the role of the upper and lower ends of the pillar. By the load force and G2 / 2 (upper and lower), you can make a force equilibrium diagram.
    Gantry crane pillar and stretched out arm folded under pressure and the role of Alice.
    Gantry crane pillar and stretched out arm,overhead gantry crane particularly for auxiliary crane, mostly made ​​of wood, because wood fold resistance to stress and Alice very good performance.overhead bridge crane Wood Type: cedar or pine.
    If the outstretched arms made ​​of lattice beams and columns line, then the interface is synthesized by four L-shaped square, which is surrounded in a plane iron flat iron or L-phase connection.
    In order to create a simple, transport facilitation, stretched out arm can be divided into two, and make it part of the length of the outstretched arm with the required total length of the pillar is also synthesized by the three parts, in which inter-segment length can be changed.