Bridge expansion device is a bridge annex, which mainly application in highway, railway and other projects, is a kind of devices on the protection of the bridge expansion device .

The kind and sort of bridge expansion device

It can be divided into six kinds according to the different body structure

1、the type of pure rubber expansion device ：

 the body structure is composed entirely of rubber (including special-shaped steel height of less than 50mm and rubber band composed of single-slit)it is used in the volume ≤50mm  

2、The type of bridge expansion device with stuffed plastic body  

We can melt a special elastic-plastic-body rubber, in pouring among the stones

Called “TST bridge device plastic body shell“It is suited the volume ≤ 50mm。

3、The type of board expansion device  

The body structure is made by the rubber, steel or angle sulfide called for the integration of the plate expansion device, it used to the volume＜60mm can’t apply to highway projects

4、The type of Polyurethane spring telescopic device:   

It is displace to use of the polyurethane spring and control between the beam and beam tandem installation, suited to the volume of 160 ~ 1200 telescopic device