The SAFS steel structure space frame engineering manufacturer will show you how to install the space truss through the 5 point method in the article.
The comprehensive service platform and the fulcrum of the tire frame should have sufficient bending strain as much as possible. Signs indicating the main control points should be established on the comprehensive service platform as measuring points during the production of prefabricated components. On the comprehensive service platform (which has been measured and the error is within 3mm), the horizontal projection point of the truss control point is marked, and the anti-counterfeiting mark or other prominent marks are marked.
The space frame processing plant uses a leveling instrument or other leveling experimental instruments to accurately measure the vertical building elevation of the control point of the truss to ensure that the vertical building elevation specification and model of the control point of the prefabricated component meet the requirements of the construction drawings. Then use a hanging hammer ball or other experimental instruments (such as a level) to ensure that the horizontal projection point of the control point on the truss coincides with the contract price control point on the comprehensive service platform, and the allowable deviation is within 2.b250m. Fix the tire frame with temporary fulcrums such as angle steel or round steel to prevent the tire frame from shaking during the entire assembly process and reduce the accuracy of the control points.
Use a hoist to place the connected chord on the tire wall according to its detailed position, and fix the positioning block. The control points on the truss shall be accurately measured again with experimental instruments such as spirit level and spirit level, and the deviation points shall be adjusted according to the adjustment block to ensure the proper position of the chord.
When the space frameprocessing plant establishes the relative position, try to weld the shrinkage volume by electric discharge welding, and integrate the details of the construction project. Put 1～Mm on each connection head. Scribe on the tire wall for each fixing point of the chord. Assemble the assembly line web rod, and perform accurate and precise tack welding. When the web rod joint is accurately and precisely tack welded, it should not be less than 4 points.
After accurate and precise positioning, the main truss is welded by electric welding. First weld the side that is not against the tire frame, after welding, use the hoisting machine to turn the truss against the wind, and then weld the other side. During electric welding, in order to ensure the quality of electric welding, try to avoid overhead welding. When assembling, the pre-camber value of the truss should be fully considered according to the design requirements of the scheme (the value of L/1500 can be used when there is no requirement in the scheme design).
