(1) Pull the accident vehicle onto the body girder correction platform, select some specially designed fixture clamping systems matched with the girder corrector, clamp the body, and clamp the front of the deformed longitudinal beam, that is, the mouth of the longitudinal beam, with drawing pliers.

(2) After clamping, analyze the damage of the car body, and remove the parts related to collision maintenance on the car before the stretching correction begins. Because the damage of load-bearing car body is easy to spread far away, it often spreads to some unexpected places. Determine the damage degree of the car body structure, thoroughly define the damage area and estimate the direction of the collision force, so as to do it in the work. In the process of stretching and straightening, some basic rules should be mastered when planning the repair procedure to ensure that the damaged parts can be repaired with the least amount of metal processing and will not cause further damage to the body structure. According to the sequence of repairing collision damage and the reverse procedure of causing damage, the stretching sequence is designed, and multi-point stretching is adopted when stretching the car body. Because the metal plate of the load-bearing car body is easy to shift, shrink and extend. Incorrect stretching may increase the damage of body parts, so every step should be completed carefully.

(3) Equipment stretching procedure: when stretching, stretch a little at a time, and then loosen the chain to unload and measure. Pay attention to the order of "from inside to outside" when operating, first of all, the length, along the center line of the car, stretch the longitudinal direction of the car. Then the width correction, correcting the lateral direction of the car. Finally, the height is corrected. Because the high-strength steel plate of the car body is very sensitive to heat, there is usually no need to try to complete maintenance and correct stretching in one step. Generally speaking, it is necessary to stretch-keep balance-keep balance again, and so on until the car body is stretched and reshaped.