Where Is The Main Difference Between HD200 Steel Bridge And CB321 Steel Bridge?

1. The net driveway width of 321 steel bridge bailey is 3.7m, and the net driveway width of HD 200 steel bridge is of two kinds: the standard width is 4.2m (convenient for special vehicles);

2. Adopt the staggered arrangement of the joints between the chord bars and the joints between the truss to reduce the inelastic deformation caused by the clearance of pin holes, and adopt the pre-arch method to greatly reduce the mid-span vertical deflection of the bridge. The 321 steel bridge cannot be arranged in this manner and is larger in full bridge deflection than the HD200 bridge.

3. The method of positioning and fixing guide sleeve is adopted for bolt connection members to increase the product connection precision, guide sleeve shear, bolt tension, improve the service life of bolts, and ensure the safety of steel bridge.

4. The HD 200 wind-resistant pull rod is made into a whole body and connected with the beam to improve the overall stability of steel bridge.

5. The horizontal support frame and trusses of HD200 steel bridge are bonded and fixed, so as to ensure that the whole bridge has no side bending. After the whole bridge is set up, it is also equipped with pre-arch degree.

6. Less steel bridge components are easy to assemble, disassemble, transport and store.

7. In the case of long span, the amount of steel used by the 321 steel bridge obviously exceeds that of the HD200 steel bridge. The composite form of 321 steel bridge is: three-row single-layer reinforced type, and its weight is 57.2 tons. The HD200 steel bridge combination form is: double-row single-layer reinforced type, its weight is: 54.8 tons, compared with 321 steel bridge save 2.4 tons of steel, its steel bridge bailey pin net lane also increased to 4.2 meters, to facilitate the passage of vehicles.

8. When special loads are needed, CB321 steel bridge cannot be carried, while the HD200 steel bridge can carry a maximum load of 60 tons per unit.