① Before installation, the construction unit should check the product certificate, design document and pre-assembly record of the component, and recheck the size of the recorded component. When the deformation and defect of the steel structure exceed the allowable deviation, it should be treated.
Before installation, a detailed measurement and correction process should be prepared, and the welding of thick steel plates should be simulated before welding and installation of the product structure process test, and the corresponding construction process should be prepared. A certain camber degree should be preset for the assembled roof truss.
② After the steel structure is hoisted into place, the control points of the design requirements such as the positioning axis and elevation of the components should be measured and marked, and the quality of the hoisted butt joint should be checked before welding. Install the temporary support and steel wave rope to make the steel roof truss safe and stable during the construction process.
③ When installing the steel structure, the construction unit shall submit the elevation dimensions, welding, painting, etc. of each component after hoisting to the supervision for acceptance.
