钢结构的上游行业为钢铁等原材料供应行业
1. The upstream industry of steel structure is steel and other raw materials supply industry.
钢铁行业是钢结构产业发展的物质基础，钢铁行业的技术进步为钢结构的应用创造了有利条件。国内钢铁行业的一些大企业已经开始了建筑结构用钢的品种和技术的研发，相继开发了高强钢和耐火、耐候、耐海水、抗层状撕裂、抗低温用钢，以及H
型钢、高性能彩涂钢板、冷弯型钢等，为钢结构产业的发展奠定了良好的应用基础。
The steel industry is the material basis for the development of steel
structure industry. The technological progress of steel industry creates
favorable conditions for the application of steel structure. Some large
enterprises in the domestic steel industry have started the research
and development of varieties and technologies of steel for building
structures. They have successively developed high-strength steel and
steel for fire resistance, weather resistance, seawater resistance,
lamellar tearing resistance and low temperature resistance, as well as
H-shaped steel, high-performance color coated steel plate, cold-formed
steel, etc., laying a good application foundation for the development of
steel structure industry.
2、上下游对本行业的影响
2. Impact of upstream and downstream on the industry
钢结构的上游主要是钢铁行业，钢材产品价格波动直接影响本行业的采购成本。从整体上看，上游行业基本属于竞争性行业，生产用于钢结构的各类钢板、钢管、型钢等钢材，其中H
型钢和中厚板是钢结构建筑中最为常用的产品。产业洞察研究数据2011 年粗钢产量达6.96
亿吨，产量相对饱和，钢结构生产所需的原材料能获得稳定的供应。
The upstream of steel structure is mainly steel industry, and the price
fluctuation of steel products directly affects the procurement cost of
the industry. On the whole, the upstream industry is basically a
competitive industry, producing various kinds of steel plates, steel
pipes, steel sections and other steel products for steel structures,
among which H-shaped steel and medium thick plate are the most commonly
used products in steel structure buildings. According to the industry
insight research data, in 2011, the crude steel output reached 696
million tons, which is relatively saturated, and the raw materials
required for steel structure production can be supplied stably.
下游行业对钢结构行业的发展具有较大的牵引和驱动作用，它们的需求变化直接决定了行业未来的发展状况。钢结构以其强度高、自重轻、抗震性能好、工业化程度高、施工周期短、可塑性强、节能环保等综合优势，在工业厂房、市政基础设施建设、文教体育建设、电力、桥梁、海洋石油工程、航空航天等行业得到了广泛的应用，市场空间逐步扩大。另外，一旦住宅钢结构市场取得突破，逐步取代传统建筑形态进入住宅建设领域，钢结构行业将引来爆发性的增长。
The downstream industry has great traction and driving effect on the
development of steel structure industry, and their demand changes
directly determine the future development of the industry. With its
comprehensive advantages of high strength, light weight, good
anti-seismic performance, high degree of industrialization, short
construction period, strong plasticity, energy conservation and
environmental protection, steel structure has been widely used in
industrial plant, municipal infrastructure construction, culture,
education and sports construction, power, bridge, offshore oil
engineering, aviation and other industries, and the market space has
gradually expanded. In addition, once the residential steel structure
market has made a breakthrough and gradually replaced the traditional
architectural form into the field of residential construction, the steel
structure industry will lead to explosive growth
