1. Before the installation of columns, should check the distance between the bolts and the threads for damage.

2. Lifting of structure should take appropriate measures to prevent excessive bending and torsion deformation.

3. After hoisting of structure should be promptly fastened to contact support and other components, to ensure the stability of structure.

4. All the lifting of the upper components must be in place in the lower part of the structure, calibration and later fastened to the support members.

5. In the installation of steel structure,frist to install columns ,then install the beam (in order ,start installation from the frame near the gable ,with brace), after installation of frame,then purlins, support, and all others, and examine the vertical degrees. Adjust the spacing and elevation, the beam axis, with a pass and then finally fixed and must guarantee the stability of the structure ,shall not be forced to install, resulting in a permanent plastic deformation of structure and components.

6.In the unit of steel structure and successive installation process, should be timely adjusted to eliminate the cumulative error, bringing the minimum deviation to total install.

7. Any installed ports are not free gas cutting reaming, not free to change the bolt diameter.

 8.Before roof beams to installation,should make the inspection to all the capitals elevation, the axis, anchors location, extended length, concrete strength and acceptance.

9. All brace connections with the purlin bolt hole diameter than 1.5mm ~ 2.0mm.

10. To closely integrated components, high-strength bolts are affixed to the surface of non-welding, gas cutting, burrs and other impurities.

11. High-strength bolts is free rain before screw.

12. Joint surface of high-strength bolts shall not be painted.

13. To the foot anchors the construction error, the center offset of 5mm, the level of degree of L/1000. 14. stitching up and down flange and web of Crane beam should not be located in the same cross section, the staggered spacing should be greater than or equal to 200mm, joints should be located away from the bearing position of the 1 / 4 within the beam span.