Steel structure manufacturers construction in different seasons should pay attention to the matters are different, cold weather, people's reaction speed is not fast in summer, and the solder joint requirements are also higher, so the construction in winter is more difficult than the summer construction. The construction team of our steel structure manufacturer must pay more attention to the construction and production process during the construction, of course, other seasons can not be ignored, there will be some emergencies at any time, has been strictly checked in the process of production and construction, so what should be paid attention to in the winter steel structure construction?
1. Winter construction of steel structure construction shall be carried out in strict accordance with the relevant provisions of winter construction of steel structure.
2. steel member positive and negative temperature installation, should consider the shrinkage of the member according to the environmental temperature difference, the construction should be taken to adjust the deviation of technical measures.
3. Welders involved in the construction of negative temperature steel structure must pass the negative temperature welding process training, only after passing the examination can obtain the welder qualification certificate.
4. Steel and related connection materials used under negative temperature conditions shall be accompanied by quality certificates, and their performance shall conform to the design and product standards.
5. the electrode under negative temperature exposure time is not more than 2 hours, baking time is more than 2 hours, the electrode baking times is not more than 3 times.
6. Flux should be baked according to regulations before use to avoid moisture content exceeding 0.1%.
7. High strength bolts used under negative temperature condition must have product qualification certificate, and recheck torque coefficient and axial force under negative temperature condition.
8. Water coating shall not be used when steel structure is coated under negative temperature.
9. When the member is blanking, the shrinkage allowance should be reserved, and the welding shrinkage and compression deformation should be coordinated with the shrinkage deformation of steel under negative temperature.
10. When assembling components, the combination should be expanded from the inside to the outside according to the sequence stipulated by the process, and the test should be carried out in the negative temperature combination to determine the weld shrinkage value that needs to be retained.
