Hao-brand telescopic device | GQF-C40 bridge expansion joints | white bridge expansion joints supplied by Hao-engineering rubber. We are Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) located at: Hebei Hengshui specializes in: grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical steel bearing current domestic outside Modular bridge expansion joint device has various types, in addition to the shape and form of shaped steel sealing rubber bands have differences, and physical and mechanical properties of rubber seals rubber band is basically an indicator of the general provisions are consistent. Single slit expansion joint device is determined by the Ministry of Transportation Highway Planning and Design Institute, Chang'an University (formerly Xi'an Highway Institute), Xi'an self Chemical Industry Company (formerly Xi'an self Rubber Factory) collaboration developed a series of expansion joint device belongs Modular Bridges expansion joint device in a class of products. 1, the composition of the body was originally welding steel and rubber parts, structural features and principles of the single slit type bridge expansion joint device, formed by the steel beam system and the control box to withstand vehicle load bearing institution, affecting steel produced by the lever arm and control system of the beam to control the displacement of the telescopic drive mechanism means closing sheets, and a rubber sealing means, the auxiliary member and anchorage facilities composed. General span bridge as the main form used within 16m, was recorded at 72, between the abutment and approach slab, or between the abutment and the bridge deck, the majority appear sizes through crack or cracks, some circle into pits, breakage rate is almost 100 percent, laminated rubber telescopic device, usually in the 16m span bridge over the use of bridge expansion joints, along the survey 42 total single record total 116, including loose , shedding serious damage has 56 GQF-C80 bridge expansion joints, accounting for 48% of the survey of the book, and another 60 in different degrees of slight loosening appear damaged precursor accounted for 52%, and only several Interchange main bridge stretching device more intact, ruler version telescopic device, along such a telescopic device, such telescopic device along a total of 20 GQF-C40 bridge expansion joints, 9 to appear cover screws loose, and just eat the cover plate off, Hubei Province sand Yang Han River bridge with a main span 113m multi-span prestressed concrete continuous beam bridge part version ruler, ruler plate telescopic device damage loss, anchors exposed, the market poke bad car tires, drivers complain incessantly.