[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 is wound ball, a four-bar 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 angle diagonals fight unit, grid spacing Sliding Bearings transportation position is not correct, the angle error 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, Hainan grid spacing sliding seat, should be cut off over the pole pieces with a cutter, flexible grid spacing Sliding Bearings, 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, after the gap ministries basically qualified, and 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). [Grid] similar tablet bearing pressure bearing node domain common plane truss bearing nodes. [Grid] node applies to carriage bearing no obvious uneven subsidence, small temperature span of less stress light grid. [Seat] grid software mainly for grid node rectangular plate bearing pressure calculated mainly follow the "Steel Design Manual connection node" (second edition), the relevant provisions and regulations. Often, a simple rectangular plate pressure plate holder can cross node, supporting stiffeners generally positive place with cross, or with cross placed diagonally (). Articulated support of grid plate pressure bearing node, when the above form, its structure and calculated according to the following requirements. [Grid] node should strive bearing structure is simple, grid spacing slip bearing price, transfer clear, safe, reliable, and as far as possible in line with calculations assume, in order to avoid actual and calculated values ??of internal forces and deformation of the grid there is a big which endangers the safety structure differences. ? Should be based on the type of space truss span size, applied load, the truss rod cross-sectional shape and the manufacturing method and construction and installation method, choose the appropriate type of bearing nodes. [Seat] grid nodes are usually flat seat, curved seat, ball joints and rubber bearings and other bearings. According stress state, the grid nodes are generally divided into abutment pressure and tension JOINTS JOINTS two categories. Steel truss installation of steel and connecting material, high strength bolts, welding rod, wire, flux, etc., shall meet the design requirements, and should have factory certification. Hollow steel truss mounting solder balls, solder balls stiffened, bolts ball. Semi-finished small fight unit, rods and rubber bearings and other semi-finished products, should meet the design requirements and the corresponding national standards.