The construction requirements for steel structures vary in different seasons, so what are the things we need to pay attention to during winter construction when the temperature is lower?
1. The winter steel structure manufacturing and installation construction shall be strictly carried out in accordance with the winter steel structure construction regulations.
2. When producing steel components at positive temperature and installing them at negative temperature, the shrinkage of the components should be considered based on the difference in ambient temperature, and technical measures should be taken to adjust the deviation during the construction process.
3. Steel and related connecting materials used at negative temperatures must be accompanied by quality certificates, and their performance must meet the requirements of design and product standards.
4. Welding rods used at negative temperatures shall not be exposed for more than 2 hours, and shall be re baked after 2 hours. The number of times the welding rod is baked shall not exceed 3 times.
5. High strength bolts used at negative temperatures require product certification, and torque coefficient and axial force should be rechecked at negative temperatures.
6. Water based coatings shall not be used for steel structures at negative temperatures.
7. When cutting components, shrinkage allowance should be reserved, and welding shrinkage and compression deformation should be coordinated with the shrinkage deformation of steel at negative temperatures.
8. When assembling components, expand the assembly from the inside out according to the process specifications, and conduct tests during negative temperature assembly to determine the necessary welding shrinkage values.
