中国的建筑用钢总量约占全部钢产量的20％～25％，而工业发达的国家则占30％以上。如美国和日本，该项指标均已超过50％。在我国，钢在建筑中主要用于建筑钢结构 ，钢筋混凝土用钢筋，钢绞线，钢丝，门窗等，而其中钢结构用钢只占10％左右，在我国一亿吨的钢产量中，真正用于钢结构的也就200～300万吨。
     　根据美国金属建筑行业分布的一些数据，美国金属建筑行业的发展和市场的基本情况是：在20世纪50、60、70、80和90年代，以百万美元计的年销售额/以万吨计的年加工量分别为150/30、300/65、1200/110、1500/125和2200/190。
     低层、多层建筑钢结构和轻钢结构
　　美国金属建筑的主要市场分布：工业（生产用厂房、仓库及辅助设施等）、商业（商场、旅馆、展览馆、医院、办公大楼等）、社区（私有及公有社区活动中心及建筑如学校、体育馆、图书馆、教堂等）、综合等方面，分别占到46％、31％、14％和9％的份额。
     在美国，低层建筑中采用钢结构是很普遍的。所谓低层建筑是指层高低于18m，层数不超过5层的工业厂房、仓库、办公室及其他的办公和社区建筑等，其中两层以下的非居住用楼房建筑占70％。
     轻钢建筑 在一些发达国家已被广泛应用于工厂、仓库、体育馆、展览馆、超市等建筑。所谓轻钢是指以彩钢板作为屋面和墙面，以薄壁型钢作檩条和圈梁，以焊接"H"型截面物做主梁，现场用螺栓或焊接拼接的门式钢架为主要结构的一种建筑，再配以零件、扣件、门窗等形成比较完善的建筑体系，即轻钢结构体系。
     高层及超高层钢结构由于人类文化生活不断提高，对高层、大跨度建筑的要求也就越来越高。而钢结构本身具备自重轻，强度高，施工快等独特优点，因此对高层、大跨度，尤其是超高层、超大跨度，采用钢结构更是非常理想。目前世界上最高，最大的结构采用的都是钢结构，而历届奥运会的场馆也多采用钢结构。

Total amount of construction steel in China accounts for about 20% of total steel production to 25%, while the industrial developed countries accounted for more than 30%. Such as the United States and Japan have more than 50% of the target.  In China, the steel used in construction steel structure, reinforced concrete with steel bars, steel wire, steel wire, doors and windows, of which only 10% of the steel structure of steel in China 100 million tons of steel production in also true for the steel 200 3 million tons.
Distribution of metal building industry, according to some data, the U.S. metal construction industry development and market the basic situation is: in the 20th century, 50,60,70,80 and 90, in millions of dollars in annual sales / thousands of tons of The annual processing capacity were 150/30, 300/65, 1200/110, 1500/125 and 2200/190.
 Low-rise, multi-layer construction steel and light metal construction of the major U.S. steel market distribution of: industry (production plant, warehouse and auxiliary facilities, etc.), commercial (shopping centers, hotels, exhibition halls, hospitals, office buildings, etc.), Community ( private and public buildings such as community centers and schools, gymnasiums, libraries, churches, etc.), and integration aspects, respectively, accounted for 46%, 31%, 14% and 9% share.
In the U.S., the use of low-rise steel structure is very common. The so-called low-storey building is less than 18m, rise no more than 5 layers of industrial plants, warehouses, offices and other office and community buildings, among which the following two non-residential building construction accounts for 70%.
Light steel construction in some developed countries has been widely used in factories, warehouses, stadiums, exhibition halls, supermarkets and other buildings.  The so-called light steel refers to the color steel roof and wall as to be thin-walled steel purlins and ring beam, to weld "H" type cross section beam thing call the shots, the scene with a bolt or weld steel of splicing the main structure a kind of construction, which together with spare parts, fasteners, doors and windows forming a rather complete building system, that is light steel system.
 High-level and high-rise steel structure rising due to human cultural life, on the top, the requirements of large-span building also increasing. The steel itself has light weight, high strength and rapid construction of the unique advantages, so high, large span, especially in high-rise, super long span, with steel is ideal. The highest in the world, the largest steel structure is adopted, the previous Olympic Games is also to use more steel.

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