钢梁重量表:2.5 m0.039, 3 .0m0.055 ,4.m0 .099, 5 m 0.154, 6 m 0.222 ,6.5m 0.26 ,7m 0.302 ,8 m 0.395, 8.2m 0.415, 9 m 0.499, 10 m 0.617 ,12m 0.888 ,14m 1.208 ,16m 1.578 ,18 m 1.998 ,20 m 2.466 ,22 m 2.984 , 25m 3.853 ,28 m 4.833 ,30 寸m 5.548 ,32m 6.313 ,36m 7.99 ,38m 8.901 ,40 m 9.865 ,50 m 15.413