一、工字钢的概述      工字钢也称钢梁，是型钢的一种，截面为工字形的长条钢材。其规格以腰高（　h）＊腿宽（b）＊腰厚（d）的毫米数表示，如“工160＊88＊6”，即表示腰高为160毫米，腿宽为88毫米，腰厚为6毫米的工字钢。二、主要用途      工字钢广泛用于各种建筑结构、桥梁、车辆、支架、机械等。三、种类和规格      工字钢分普通工字钢和轻型工字钢，热轧普通工字钢的规格为10-63＃。经供需双方协议供应的热轧普通工字钢规格为12-55＃。工字钢的规格也可用型号表示，型号表示腰高的厘米数，如工16＃。腰高相同的工字钢，如有几种不同的腿宽和腰厚，需在型号右边加a，b，c予以区别，如32a＃，32b＃，32c＃等。热轧普通工字钢每米重量表型    号尺寸（毫米）截面面积（厘米2）理论重量（公斤/米）hbdtr110100684.57.63.314.311.212.61267458.43.518.114.214140805.59.13.821.516.9161608869.9426.120.518180946.510.74.330.624.120a200100711.44.535.527.920b200102911.44.539.531.122a2201107.512.34.8423322b2201129.512.34.846.436.425a250116813548.538.125b2501181013553.54228a2801228.513.75.355.4543.428b28012410.513.75.361.0547.932a3201309.5155.867.0552.732b32013211.5155.873.4557.732c32013413.5155.879.9562.836a3601361015.8676.359.936b3601381215.8683.565.636c3601401415.8690.771.240a40014210.516.56.386.167.640b40014412.516.56.394.173.840c40014614.516.56.310280.145a45015011.5186.810280.445b45015213.5186.811187.445c45015415.5186.812094.550a5001581220711993.650b5001601420712910150c5001621620713910956a56016612.5217.3135.25106.256b56016814.5217.3146.4511556c56017016.5217.3157.85123.963a63017613227.5154.9121.663b63017815227.5167.5131.563c63018017227.5180.1141