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工字鋼：工字鋼鋼質型材的一種，也稱鋼梁，是截面為工字形的長條鋼材--由此得名“工字鋼”。 工字鋼 規格及型號 其規格以腰高的毫數表示，如“工160×88×6”，即表示腰高為160毫米，腿寬為88毫米，腰厚為6毫米的工字鋼。 標稱規格 工字鋼的規格也可用型號表示，型號表示腰高的厘米數，如工16#。合金元素與鐵、碳的相互作用合金元素加入鋼中后，主要以三種形式存在鋼中。

I-steel: a steel bar of I-steel, also known as steel beam, is a long steel section of the cross section, which is called "i-i-steel". The specificati and types of I-steel are represented by the number of waist height, such as "160 x 88 x 6", that is, I-bar with waist height of 160 mm, leg width of 88 mm and waist thickness of 6 mm. The specificati of the nominal size of the I-steel can also be expressed by the model, and the size of the height of the waist is centimetre, such as the 16#.

H型鋼屬于經濟裁面型材(其它還有冷彎薄壁型鋼、壓型鋼板等)，由于截面形狀合理，它們能使鋼材更高地發揮效能，提高承裁能力。

H steel is an efficient and economical cutting section (other cold-formed thin-walled steel and profiled steel sheets). Because of the reasonable shape of the section, they can make the steel play a more effective role and improve the bearing capacity.

槽鋼按形狀又可分為4種：冷彎等邊槽鋼、冷彎不等邊槽鋼、冷彎內卷邊槽鋼、冷彎外卷邊

依照鋼結構的理論來說，應該是槽鋼翼板受力，就是說槽鋼應該立著槽鋼，普通槽鋼規格而不是趴著。

According to the channel shape and can be divided into 4 kinds: cold bending equilateral channels, cold-formed non equilateral channel steel, cold rolled steel, cold bending edge edge

According to the theory of steel structure, it should be the force of the channel steel wing plate, that is to say the channel steel should stand the channel steel, ordinary channel steel specification rather than lie.

型材按斷面尺寸可分為大型、中型和小型型材，其劃分常以它們分別適合在大型、中型和小型軋機上軋制來分類。大型、中型和小型的區分實際上并不嚴格。另外還有用單重（kg/m）來區分的方法。一般認為，單重在5 kg/m以下的是小型材，單重在5～20 kg/m的是中型材，單重超過20 kg/m的是大型材。因此又可以進一步分成凸緣型材、多臺階型材、寬薄型材、局部特殊加工型材、不規則曲線型材、復合型材、周期斷面型材和金屬絲材等等。Whenchoosingplywood,youshouldpayattentiontoselectingplywoodwithoutglue。