工字鋼也稱為鋼梁（英文名稱 I Beam)，是截面為工字形狀的長條鋼材。工字鋼分普通工字鋼和輕型工字鋼，H型鋼三種。工字鋼廣泛用于各種建筑結構、橋梁、車輛、支架、機械等。

I-steel beam (also known as English name I Beam), is an H-shaped steel strip section. I-steel is divided into three kinds: ordinary I-steel and light I-steel, H type steel. I-steel is widely used in various architectural structures, bridges, vehicles, stents, machinery and so on.

型材按使用部門分類有鐵路用型材（鋼軌、魚尾板、道岔用軌、車輪、輪箍）、汽車用型材（輪輞、輪胎擋圈和鎖圈）、造船用型材（L型鋼、球扁鋼、Z字鋼、船用窗框鋼）、結構和建筑用型材（H型鋼、工字鋼、槽鋼、角鋼、吊車鋼軌、窗框和門框用材、鋼板樁等）、礦山用鋼（U型鋼、槽幫鋼、礦用工字鋼、刮板鋼等）、機械制造用異型材等。按斷面尺寸大小分類。Features:decorativepanelsaregenerallyusedforoildecoration。

裝飾板材是所有板材的總稱，主要有：細木工板、膠合板、裝飾面板、密度板、集成材、刨花板、防火板、石膏板、PVC板、鋁扣板、鋁塑板、三維板等。

Decorative board is the general name of all board, mainly:  board, plywood, decorative panel, density board, integrated material, particleboard, fire board, plasterboard, PVC board, aluminum plate, aluminum plastic board, three-dimensional board, etc.