少妇人妻上班偷人精品免费,91视频官网人妻,无码国产一区二区,亚洲AV无码综合在线观看

Structural design knowledge: What are the advantages and disadvantages of steel structures?

Structural design knowledge: What are the advantages and disadvantages of steel structures?

What are the advantages and disadvantages of steel structures?
Steel features:
(1) high intensity, high weight ratio; good ductility, toughness;
(2) Material uniform, consistent mechanics assumptions, security high reliability;
(3) industrial production, a high degree of industrialization, the construction speed;
Cons: not fire-resistant steel heat; easy to rust, corrosion resistance is poor.