Hao-engineering rubber | Continuous Beam Ball bearings | Ball bearings provided by Changzhou 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 foreign countries have widely used in more than 4,000 bridges, and in the 1970s and 1980s, have been a complete standard specification, confirmed the laminated rubber bearing works, design methods, product manufacturing tolerances and mechanical properties of the finished product test requirements, such as International Union of Railways UIC regulations published in 1969, the German "structures bearing" (DIN 4141-1981), British Standard "Steel, concrete bridges and composite bridges" (BS5400-1978) in the ninth chapter, "bridge support" United States' highway bridges standards "(AASHTO-1983) in the low 14 Chapter 25 Chapter elastic support as well as France, India and other countries also have their own standards do too. 1956 Development of laminated rubber bearings and published the "Handbook supporting roads and bridges" in the 1982 amendments expanded the scope of use of laminated rubber bearings. With the advancement of technology, perfect testing means testing and practical application of these standards are constantly revised and improved, such as the United States published in the "American Highway Bridge Design Specifications" (AASH-TO-LRFD) version of the 2004 Chapter 14 of the seams and bearing, DIN and British BS5400 and European standards are published EN1337-2005 corresponding structures bearing, Japan once again revised the publication of "Handbook road bridge support," 2004 and so on. However, these standards revision of laminated rubber bearing works finds no substantial change in type, as the American bridge design specifications noted, some changes in the form of some formula, single physical meaning has not changed. In the design, the general requirements to use rubber bearing at least 30 years or more actual foreign requirements are higher, such as the use of substandard products, not in three, five years, ten years on certain problems, when the In the long run, will reduce the life of rubber bearings, and the emergence of the early destruction of continuous beam bearing ball bearing, causing economic losses, which is currently one of the main problems existing in laminated rubber bearings, Hope Project using the unit, not only cheap to buy as the main basis for support. Installation and maintenance, the laminated rubber bearing installation and maintenance, but also affect the use of laminated rubber bearings effects and life critical, so tension and compression ball in the newly revised industry standard bearings, added some requirements in this regard. If the installation is unreasonable, not the construction process, the construction process mishandling or branched cushion stone bearing the bottom center of the plate and beam receiving seat centerline do not coincide and so on. After the beam installation is complete, you may have a bias bearing goods does not appear to meet the requirements of the initial shear deformation, which are a direct impact on the effectiveness and use of rubber bearing life xqz series of ball bearings, so that the construction we must ensure close contact with the two ball bearings bearing, bearing between the piers, so stand by force, does not allow partial pressure and void phenomenon. Sometimes after encountering construction is completed, the construction of temporary taken to prevent the displacement of fixed setting, no timely removal, in addition, the construction process because the installation of laminated rubber bearing capacity is quite large.