Hao-spherical steel truss seat for 50 years _ spherical steel ball bearing steel bearing finished _ provided 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 vertical If the load bearing function in the vertical load on the laminated rubber bearing steel ball bearing factory outlets earthquake, then as shown, with compression being squeezed out in the free side, if only rubber sheet steel ball bearing slide supply, rubber plate and the support surface due to the friction can not see the emergence of resistance to pressing force of the bulging linear, so that if a rubber plate attached below the stiffening plate prevents the bulging imagine, the side facing the outside of the bend only little compression deformation, and further In the middle of the rubber layer insert bend stiffener plate limit, then as a stand carrying capacity will be greatly increased. With the added strength when subjected to vertical load bearing steel reinforced rubber stress state shown. Upper and lower bound rubber stiffening plates bulge, the contact between the two generate shear. According tension stiffening steel produced. Tension stiffening plates produced with rubber plate thickening increases. The amount of displacement of the horizontal displacement functions for the horizontal displacement of the upper structure is made of rubber, rubber bearing shear deformation absorbed, then the role of the level of the upper and lower bearing surfaces of rubber bearing reaction force, without rubber bearing planar shape stiffening effects of steel, if the shear modulus of elasticity of the rubber material to determine, size and function of the reduced shear deformation under pressure. When selecting PTFE slide bearing, should also be noted, as long as the beam end bearing deformation turn to meet the requirements, the more favorable the thinner bearing thickness, because bearing to withstand the horizontal forces bearing shear deformation does not depend on the completion of another bridge structure When the overall design, but also fully consider the fixed bearing, bearing activities and forms part of the curved bridge abutment structure and reasonable layout. In our country has always been a bridge and culvert specifications and industry standards in design and construction of laminated rubber bearings and acceptance of all requirements necessary to mount the beam bottom, stand, stick close contact with the pier and down, so bearing force uniform grid spherical steel bearing products, may not appear void phenomenon, to ensure the best seat in force uniform, with no void phenomenon, to ensure the best seat in the stress state, when the beam has a longitudinal, should be leveling process. Currently, the world bridge of standards such as the American AASHTO-LRFD Bridge Design Specifications Highway (2004) EN1337-3 European standards (2005) and others require steel ball bearings, when the average temperature at constant loads and all, beam bottom relative horizontal ask more than 0.01rad, you must use steel to make bridges wedge angle is zero, ensuring bearing bearing horizontal force, so our bridge design specifications and bearing industry standards are clearly defined when the bottom longitudinal beam must be greater than 1% leveling process, but when the two longitudinal slope of less than 1%, when selecting their seat regulations will deform into account, this can not be ignored.