Steel grid bearing grid bearing】 【grid holder is based People's Republic of China Communications Industry Standard "ball bearings technical conditions (GB / T17955-2009) and seismic design of buildings (GB50011-2001) Steel Design Specification (GB50017-2003), through detailed statics, dynamics analysis developed from the new seismic damping steel bearing. Seismic damping bearing structure is more reasonable, more reliable performance and longer life. [Grid holder] (aka steel bearing) is divided into four types: GKQZ seismic steel ball bearing type, GJQZ type damping steel ball bearings, GKGZ steel structure seismic steel ball bearings, GJGZ steel structural damping steel ball bearings. [Grid] bearing the holder comprises a fixed bearing (code GD), a one-way bearing (code-named DX), two-way bearing (code SX) three types, 22 levels, their level of capacity, vertical uplift and overall strength than ordinary seat holder has greatly improved. The series bearing elastic damping element, when the level of force to a certain extent, the elastic deformation of the damping spring began to realize cushion. When the structure corner, the ball core produce rotation, release the torque generated by the upper structure. [Grid] earthquake holder, rigid and flexible measures seismic damping measures at the same time play a role, in order to resist the huge earthquake input energy, so can guarantee the bridge, under reasonable structure relative displacement, reducing the amplification factor of seismic force, and keep the structure unity. The seat can withstand earthquakes 8-11 degrees ball joint fixed grid bearing products, high-intensity earthquake zone, especially engineering structures epicentral earthquake zone have good shock damping effect. [Grid] grid body mount assembly: 1) inspection and acceptance plane grid size, the axis of the excursion, check and correct, continue assembling the main grid. 2) a small ball to fight four-bar unit (a ball of winding two-way ball bearing sliding ball joint grid, four pole for the oblique abdominal truss rod) hanging in a plane above the grid. 3) Small spell unit in place, you should check the mesh size, rise high, and small to fight cell diagonals grid angle seismic isolation rubber bearings manufacturers, to malposition, angle errors should be corrected, corrected after passing before being allowed to install. 4) [] When installing grid bearing unit found a small fight rod length, angle inconsistent, should be over the pole pieces with a cutter cuts off, then re-open groove, re-position check. 5) If you need to use the liner grid, should be good on the ball spot-welding liner. However, the small unit temporarily not fight with the plane grid spot welding, the need to cooperate with the chord to locate after welding. [Grid] bearing steel truss winding assembly and welding: 1) into the winding longitudinal plane truss rod, check winding ball longitudinal position, size is correct. Add winding plane truss of the cross bars, check winding ball lateral position, size is correct. 3) by means of three-dimensional small fight oblique abdominal rod properly adjusted, so that the winding of the vertical and horizontal bars and solder ball is properly seated. The adjustment of the diagonal web members is to either cut through the shaft element can also be used to pull down the chain angle diagonals, the lever member is seated properly. Winding ensure the correct size of the grid. 4) Adjust the gap ministries grid holder, after the basic qualification gap ministries, then spot-chord member. 5) after winding lever tack, then spot welded ball with diagonals lower chord welds, making it firmly associated. 6) Check the mesh size gradually, step by step forward. Truss webs and the installation of truss chord should cooperate with each other. 7)] [grid bearing grid floor after installation, should the overall size of the installation grid strips or blocks of acceptance. 8) to be the lifting of the grid must be completed welding process, the weld appearance quality, qualified after the weld ultrasonic inspection report to lifting (lifting).