Requirements for steel structure manufacturing engineering

 

The steel structure has the highest degree of industrial production, can be mass produced in batches, and has high manufacturing accuracy. The construction method of factory manufacturing and site installation can shorten the cycle, reduce the cost, and improve the economic benefits. The industrial production level of steel structure engineering is high. Although the manufacturing of steel construction requires more complex mechanical equipment and strict process requirements, it has greater advantages compared with other building structures.

 

The fire resistance of steel structure is worse than that of reinforced concrete structure, and it is generally used in the situation where the temperature is not higher than 250 ℃. In buildings with special fire protection requirements, steel construction must be maintained with refractory materials. The steel construction has a certain heat resistance. The property of the steel changes little within 250 ℃. After the temperature reaches 30 ℃, the strength gradually decreases, and when the temperature reaches 450-650 ℃, the strength is zero.

 

Under the same load conditions, when using steel structure, the dead weight of the structure is small. When the span and load are the same, the weight of steel roof truss is only 1/4-1/2 of the weight of reinforced concrete roof truss, and it is lighter if thin-walled steel roof truss is used. Due to its light weight and convenient transportation and installation, it is especially suitable for structures with large span, high height and large bearing capacity, as well as for structures that can be moved and easily assembled or disassembled. The material strength is high. Although the unit weight of steel structure is large, the strength is much higher. Compared with other building materials, the ratio of the unit weight of steel to the yield point is the smallest.