In the choice of ball bearing, should also be noted, as long as the beam end bearing deformation turn to meet the requirements, the more favorable the thickness of the thinner bearing steel ball bearing, because bearing to withstand the horizontal forces is not completed by bearing shear deformation again when the overall design of the bridge structure, but also give full consideration to fixing ball 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, design and construction of ball bearings and acceptance requirements must be made in both the beam end bearing, bearing, snug contact with the pier and down, so that the ball bearing force uniform and may not appear Void phenomenon damping steel ball bearings, rubber bearings in the best force uniform, with no void phenomenon, to ensure the ball bearing in the best stress state, when the beam has a longitudinal, should be leveling deal with. Currently, the world bridge normative standards such as the US AASHTO-LRFD Highway Bridge Design Code (2004) EN1337-3 European standards (2005) and others require, when at the annual average temperature and all the dead load, the relative level of beam bottom consult more than 0.01 When rad, ball bearing steel wedge must be used to make bridges earthquake zero angle steel ball bearing, bearing seat to ensure the level of force, so the bearing of bridge design specifications and industry standards are clearly defined when the beam bottom longitudinal greater than must be leveling process is 1%, while the two longitudinal slope of less than 1%, when selecting the ball bearing deformation regulations will take into account, this can not be ignored. The level and intensity of the earthquake, the level of earthquake magnitude earthquake is represented by the level of seismic rubber bearing as 6 earthquake, 7.6 earthquake, 7.8 earthquake, 8.9 earthquake, etc., ball bearing type according to the level of earthquake The size of the release of energy, the energy released can be calculated by detecting the energy released by an earthquake more than grade-level seismic rubber bearing the greater the current human record of the highest magnitude of the earthquake was 8.9, Ball bearing energy released is equivalent to a volume of 18 million T explosive hydrogen bomb, or the equivalent of a 100kw power plant generating capacity of 40 years. May 12, 2008 14:28 GMT Wenchuan earthquake of 8 earthquake, the energy released is roughly equivalent to the amount of 900,000 T explosive hydrogen bomb, or two 100kw power plant generating capacity. Formula to measure earthquake magnitude and intensity indicators unidirectional sliding scale steel ball bearings, the measurement and calculation ball bearing earthquake-ranking US seismologists put forward, so that the level in the earthquake-style often said how much Richter earthquake, Ball bearings energy released by an earthquake of magnitude indicates the size. The maximum amplitude of the discipline to the epicenter, more than five earthquakes can cause varying degrees of damage, called the devastating earthquake. Damping steel ball bearings, Hao-engineering rubber (certified), Nanjing steel ball bearings provided by the Engineering Rubber Co., Ltd. Hengshui HaoTong. Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) in the field of construction materials at the site devoted boundless enthusiasm and passion, Hao-engineering rubber has been customer-centric, the concept of creating value for customers, quality, service to win the market, and sincerely hope to cooperate with the community to create a successful, create brilliant. Related businesses welcomed the inquiry, Contact: Liu.