Gantry crane pressure and brake force

When fully loaded car at the ends always position, subject to the maximum vertical pillar stress. There outstretched arm  gantry crane   when the car in the extended arm of the endpoint, the pillar being the largest vertical stress.
There outstretched arm gantry crane, you must make the car and the transport of goods, can freely pass pillar.
There are twelve outstretched arm gantry  eot crane   because of their weight and dynamic load and bending moment diagrams Health and scissors map. The car can be calculated braking force, the wheel and the coefficient of friction between the tracks is 0.15.
Bridge longitudinal pressure (full load): Take 20-25 kg / m. Since the effect of wind pressure and the braking force of the horizontal force (in the car track direction), if the car mounted on the longitudinal rail of the lower edge, and placed in a suitable suspension mechanism, the pillar structure and with the main beam connection,overhead bridge crane the most simple and easiest way. At the same time as the suspension mechanism to enhance the coupling with the frame, all the horizontal force (mass force and wind), reached the level of the longitudinal plane to the coupling frame.