First of all, China’s crude steel output accounts for more than half of the world’s total output, iron ore dependence is high, and the industrial concentration is low. Under the oligopoly of the global iron ore market, we lack pricing power over upstream raw materials, and the profit of spiral steel pipe manufacturing is easy to be e...

In terms of crude steel output, the industrial concentration rate of the top 10 China steel tube manufacturers during the 13th Five-Year Plan period reached 38.8%. In the first year of the 14th Five-Year Plan period, Anshan Steel Group restructured its original steel and raised the CR10 (the concentration rate of the top 10 enterprises in the in...

High-strength fireproof glass: high-strength potassium fireproof glass is a high-strength and high-safety fireproof glass that can be used for curtain wall building exterior walls. Its strength is 15 times that of tempered glass. The broken particles are smaller than toughened glass, the fire resistance is more than 1h~3h, and the weather resist...

1. It is necessary to carry out scientific mechanical calculation on each important part of the curtain wall system, consider the influence of wind pressure, dead weight, earthquake, temperature and other functions on the curtain wall system, carefully check the embedded parts, connecting system, panels and fasteners to ensure the safety of the ...

Unit curtain wall hanging point is the foundation of curtain wall structure transmission force, so it can not be taken lightly. There are usually three design defects :(1) poor design of hanging point strength, especially the bearing capacity of negative wind pressure, which can not meet the needs. It is found in the experiment that some pendant...