What should we pay attention to when the bailey steel bridge is composed

On the lower chord, there are 4 cross beam backing plates, the upper part of which is provided with a tenon to fix the position of the cross beam on the plane, and two elliptical holes are provided on the channel steel web at the end of the lower chord rod for connecting the wind tie rod. The vertical bar is made of 8# I-steel, and there is a square hole on the side of the lower chord of the vertical bar, which is used for the beam fixture to fix the beam. The material of Beret sheet is 16Mn, and each frame weighs 270kg.
1. Check whether the bridge panel is damaged, defective and deformed, and replace it when necessary.
2. Observe whether the various dowels, bolts, beam fixtures and wind tension rods of bailey pieces are assembled, whether there is artificial damage or loosening to ensure stable passage.

3. Check whether the bridge panel is cracked, deformed or uneven, and it should be replaced when needed.

4. Measure the mid-span deflection of the bridge to see if it will increase, and the speed of the increase in deflection should be the same as the wear of the pins and pin holes.

5. Check whether the Beret steel bridge foundation has uneven settlement, and adjust it in time if found.