1, the plasticity and toughness of steel: steel structure engineering under static load, steel has a good plastic deformation ability.

2, poor corrosion resistance of steel: corrosion, cross section continues to weaken, so that the structure is damaged, steel in the humidity, erosion medium environment, easy to affect the service life, so the steel structure needs regular maintenance.

3, steel structure manufacturing factory, construction assembly: the site covers a small area, short construction period, lighter components, convenient construction, but also easy to dismantle, reinforcement and expansion.

4, the steel structure plant has the characteristics of non-leakage: whether welded, riveted or bolted connection, the steel structure can be closed without leakage.

5, the steel has good welding performance: the so-called "good" welding performance refers to the steel in the welding process and after welding, can maintain the integrity of the welding part of the property of non-cracking.

6, the steel nozzle is close to the homogeneous isotropic body: each small piece will have roughly the same mechanical properties, and the performance in all directions is roughly the same, the steel is divided into small pieces, is the basis of solid mechanics.

7, steel structure housing light weight and high bearing capacity: belong to light high-strength materials.

8, the steel structure has good heat resistance, but poor fire performance: the strength and plasticity change is very large, when it reaches 600 ° C, the strength drops to zero, completely loses the carrying capacity, improve the fire resistance grade of the steel structure, half of the commonly used concrete or brick to wrap the structure, can also be coated with fire protection.