工字型钢不论是普通型还是轻型的，由于截面尺寸均相对较高、较窄，故对截面两个主袖的惯性矩相差较大，圣霖国际板材购买，因此，一般仅能直接用于在其腹板平面内受弯的构件或将其组成格构式受力构件。
I-steel whether ordinary or light，圣霖国际板材价格， because the section size are relatively high and narrow， so the moment of inertia of the main secti of the two sleeve is large， therefore， generally only can be directly used in the web plane bending member or the of lattice stress components.
不同于普通工字型的是H型钢的翼缘进行了加宽，且内、外表面通常是平行的，这样可便于用高强度螺栓和其他构件连接。其尺寸构成合理系列，型号齐全，便于设计选用。（除了吊车梁用工字型钢）。
Unlike the ordinary I-type， the flange of H steel is widened， and the inner and outer surfaces are usually parallel，圣霖国际板材， so that it can be easily connected with high-strength bolts and other components. Its size is a reasonable series， and the model is complete， which is convenient for the design. (except for crane girder with I-type steel)
H型钢是一种断面力学性能较工字钢优良的经济型断面钢材，因其断面的形状与英文字母“H”相同而得名。热轧H型钢的翼缘比工字钢宽、侧向刚度大、抗弯能力强。同等规格下H型钢理重较工字钢轻。
H steel is a kind of economical section steel with better section mechanical properties than that of I-steel. Because the shape of the section is the same as that of the English letter "H". The flange of hot rolled H steel is wider than that of I-steel， large lateral stiffness and strong bending resistance. Under the same specification， the weight of H steel is lighter than that of I-steel.
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