In obtaining a large number of reliable experimental data on the basis of the original JTJ 023-85 specification related rectangular laminated rubber bearing additional testing research results are brought together in the transportation industry standards, and with the 1993 release of the transportation industry standard "highway bridge plate rubber Supports "(JT / T 4-93) .2003 in steel ball bearings, tension and compression ball in the summary application experience and on the basis of similar foreign products design, processing, testing and other related content norms, standards of investigation and research on the past, steel LY bearing type, combined with China's actual situation has conducted a number of tests. Laminated rubber bearings on the bridge when the application is installed between the bridge pier and beam, it not only can withstand and transmit loads fixed steel ball bearing GD type, but also adapt to the end of the beam rotation and by shear deformation of rubber bearing adapt to changes in the upper structure of the bridge stretching caused by the temperature. Compared with steel bearing, laminated rubber bearing structure is simple, easy processing bearing, steel less (only steel bearing 1 / 6-1 / 30), low cost, low damping height, easy to install and other unique advantages bridge design specifications in accordance with the reliability theory to complete the "highway reinforced concrete and prestressed concrete bridge design specifications" (JTG D62-2004), laminated rubber bearings for bridge design parameters have been revised, while the transportation industry standard JT / 4-93 was revised and issued a "highway bridges laminated rubber bearings" (JT / T 4 -2004) and 2006 have been finalized and issued with JTG D62 and JT / T 4 -2004 matching traffic industry standard "highway bridges laminated rubber bearing specifications series" (JT / T 663-2006). Currently, released on the implementation of the relevant implementation laminated rubber bearing norms, standards and norms related to the world's countries, the standard requires consistent, and has the same level. Embedded in a rubber sheet between the rubber layer to prevent lateral expansion convex drum, while almost no effect on the bearing shear stiffness in the horizontal force H effect, the displacement of the stiffening rubber bearings produced with non-rubber bearing stiffeners roughly the same level of deformation. Similar bridges generally use several layers of thin rubber sheet and plate material for stiffening stiffening rubber bearings, the finished product is between the layers of rubber sheet and coated sheet steel by a pressurized adhesive curing time in the mold into the overall structure structure. Displacement of the laminated rubber bearings and bearing only the net thickness of the rubber layer, and the other seismic steel ball bearings, to prevent corrosion of the reinforcing steel, on, under and around the stiffening rubber bearings have a certain thickness of the rubber protection layer. Transportation industry standard "highway bridges laminated rubber bearings" (JT / T 4-2004) of provisions for ordinary plate and PTFE slide plate-like rectangular and circular rubber bearing structure gives specific structure shown. Hao-engineering rubber, seismic steel ball bearings, steel ball bearings provided by Hao-engineering rubber. Search for "grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical steel bearing" fly suppliers, network operators choose to have a full alliance Certified: Engineering Rubber Co., Ltd. Hengshui HaoTong (www.htgcxj.com), trustworthiness and reliability, "business alliance customer service" on page now click on live chat with us now!