Bridges make natural barriers accessible and urban roads flexible. Sometimes bridges are built directly on the ground, but sometimes they cannot be built directly due to ground conditions. Construction workers often choose to use hundreds of tons of screw jacks or hydraulic jacks to assist other equipment in rotating the bridge in the air and then connecting it together. Is this construction method suitable for the heavy objects we come into contact with in our daily work and life?

During the rotation process of bridge components, the jack plays a role in lifting and lowering. The rotation function mainly relies on auxiliary equipment such as ball joints, lower and upper turntables, slides, and traction systems. With the joint efforts of these equipment, the large tonnage components are lifted and slowly rotated to the designated position with rotational force.

Therefore, when we want to use a screw jack to rotate heavy objects in real life, we must also prepare a device with a moving function, such as tank trucks, hydraulic trucks, and other equipment that meet the requirements. We can also use a horizontal jack with wheels to lift and move heavy objects in short distances.