[I형강] (KS D 3503, 3515/3502) 표준단면치수 Standard Sectional Dimension (㎜) 단위중량 Unit Weight (㎏/m) 표면적 Paint Area (㎡/ton) 단면적 Sectional Area (㎠) 단면계수 Modulus of Section (㎠) H X B t1 t2 r1 r2 W S A Zx Zy *100 x 75 5 8 7 3.5 12.9 37.984 16.43 56.2 12.6 *125 x75 5.5 9.5 9 4.5 16.1 33.416 20.45 86 15.3 150 x 75 5.5 9.5 9 4.5 17.1 34.386 21.83 109 15.3 200 x 100 7 10 10 5 26 30.231 33.06 217 27.7 250 x 125 7.5 12.5 12 6 38.3 25.692 48.79 414 53.9 300 x 150 10 18.5 19 9.5 65.5 18.015 83.47 849 118 *300 x 150 11.5 22 23 11.5 76.8 15.313 97.88 978 149 *350 x 150 9 15 13 6.5 58.5 21.915 74.58 870 93.5 12 24 25 12.5 87.2 14.633 111.1 1280 158 *400 x 150 10 18 17 8.5 72 19.167 91.73 1200 115 12.5 25 27 13.5 95.8 14.342 122.1 1580 165 *450 x 175 11 20 19 9.5 91.7 17.208 116.8 1740 173 13 26 27 13.5 115 13.687 146.1 2170 231 *600 x 190 13 25 25 12.5 133 14.541 169.4 3280 259 16 35 38 19 176 10.955 224.5 4330 373