GQF-F-type expansion joint device for stretching the amount of 80mm below the bridge joints. Bridge expansion joints refers to the deformation of the bridge to meet the requirements, usually between two end of the beam, or set the position articulated joints on the bridge between the end of the beam and abutment. Requires expansion joints in parallel, perpendicular to the axis of the bridge in both directions, can freely scalable, secure and reliable vehicle should be smooth too, no sudden jump and noise; to be able to prevent the infiltration of rainwater and mud blocked garbage; installation, inspection, maintenance , to be simple and easy to eliminate dirt. Set expansion joints, railings and the bridge deck to be disconnected. Bridge expansion joints role: that regulation of the upper structure by the vehicle load and bridge materials caused by the displacement between and bonding. Skew bridge stretching device is damaged, it will seriously affect driving speed, comfort and safety, even cause traffic accidents. Bridge expansion joints generally have docking, steel bearing type, the combination of shear (plate), and the elastic modulus-bearing device.