工字钢的边长小，高度大，只能承受单方向的力。 H型钢槽深，厚度大，可以承受两个方向的力。

工字钢只能用于横梁，而H型钢才能用于结构的承重柱。

The length of the I-steel is ***all and high. It can only bear the force of the single direction. The H steel groove is deep and thick, and can bear the force of two directi.

I-steel can only be used for crossbeams, and H steel can be used for structure bearing columns.

型材按生产方法可以分成热轧型材、冷弯型材、冷轧型材、冷拔型材、挤压型材、锻压型材、热弯型材、焊接型材和特殊轧制型材等。型材按其横断面形状可分成简单断面型材和复杂断面型材。简单断面型材的横断面对称、外形比较均匀、简单，如圆钢、线材、方钢和扃钢等。工字钢也称为钢梁（英文名称IBeam)，是截面为工字形状的长条钢材。复杂断面型材又称为异型断面型材，其特征是横断面具有明显凸凹分支。

按***用途分，有油桶用板、搪瓷用板、弹板用板等；按表面涂镀层分，有镀锌薄板、镀锡薄板、镀铅薄板、塑料复合钢板等。

According to professional use, there are oil board, enamel plate, bulletproof plate and so on. According to surface coating, there are galvanized sheet, tin plate, leaded sheet, plastic steel plate and so on.

装饰材料分为两大部分：一部分为室外材料，一部分为室内材料。室内材料再分为石材，板材、片材、型材、线材五个类型。

Decorative materials are divided into two parts: one is outdoor materials, the other is indoor materials. Indoor materials are further divided into five types: stone, sheet, sheet, profile and wire.