① Before installation, the construction unit shall check the product certificate, design document and pre-assembly record of the component, and check the size of the recording component. Deformation of the steel structure, defects beyond the allowable deviation should be processed.
Before installation, should be prepared in detail the measurement and correction process, thick steel plate welding should be installed before the simulation of the product structure of the process test, the preparation of the corresponding construction process. On the assembled roof truss should be a certain degree of arrogance.
② steel structure hoisting in place, the component positioning axis, elevation and other design requirements of the control point to do a good job marking the test, the quality of the lifting connector for welding before the inspection. Installed temporary support and steel cable to make steel roof truss in the construction process safe and stable.
③ steel structure installation, the construction unit should be submitted to each component after lifting the elevation size, welding, painting, etc. were submitted to the supervision and acceptance.