The wind pressure and braking force of a gantry crane result in significant vertical stress on the pillars when a fully loaded truck is in constant position at both ends. A gantry crane with an extended arm will experience significant vertical stress on the support column when the car reaches the end of the extended arm.

A gantry crane with an extended arm is used to allow the sports car and the transported goods to freely pass through the support pillars.

The bending moment diagram and shear diagram of a gantry crane with one or two extended arms due to its own weight and dynamic load. The braking force of the sports car can be calculated, and the friction coefficient between the wheels and the track is 0.15.

Longitudinal wind pressure of the bridge (at full load): 20-25 kilograms per square meter. Due to the horizontal force exerted by wind pressure and braking force (in the direction of the sports car track).

The determination of the force on the angle iron on the main beam can be referred to in detail in our previous discussion. If we install the sports car track on the lower edge of the longitudinal beam and place it on an appropriate suspension mechanism, the structure of the pillar and its connection with the main beam will be simple. This suspension mechanism also serves as a connection for the reinforcement frame, transmitting all horizontal forces (mass forces and wind forces) to the horizontal connection frame on the longitudinal beam plane.