단면치수 무게 단면적 단면2차모우먼트 단면계수 단면2차변경 AxB 두께 t W a lX lY Zx Zy lx ly mm mm kg/m ㎠ ㎤ ㎤ ㎤ ㎤ ㎝ ㎝ 25.4x25.4 1.6 1.14 1.457 1.34 1.34 1.06 1.06 0.961 0.961 30x30 1.6 1.38 1.752 2.31 2.31 1.54 1.54 1.15 1.15 40x40 1.6 1.88 2.392 5.79 5.79 2.90 5.90 1.56 1.56 2.3 2.61 3.332 7.73 7.73 3.87 3.87 1.52 1.52 3.2 3.49 4.447 9.72 9.72 4.86 4.86 1.48 1.48 50x50 1.6 2.38 3.032 11.7 11.7 4.68 4.68 1.96 1.96 2.3 3.34 4.252 15.9 15.9 6.34 6.34 1.93 1.93 3.2 4.50 5.727 20.4 20.4 8.16 8.16 1.89 1.89 60x60 2.3 4.06 5.172 28.3 28.3 9.44 9.44 2.34 2.34 3.2 5.50 7.007 36.9 36.9 12.3 12.3 2.30 2.30 75x75 2.3 5.14 6.552 57.7 97.1 15.2 15.2 2.9 2.95 3.2 7.01 8.927 75.5 75.55 20.1 20.1 2.91 2.91 100x100 2.3 6.95 9.852 140 140 27.9 27.9 3.97 3.97 3.2 9.52 12.13 187 187 37.5 37.5 3.93 3.93 4.5 13.1 16.67 249 249 49.9 49.9 3.87 3.87