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Question: 712 a built up steel member is composed of a...

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7.12 A built up steel member is composed of a W18X71 wide flange shape section with a 12 in by 12 in plate welded to its top flange as shown. Locate the X-X centroicd. Cover plate- 12 X W18 × 71 TABLE A1 U.S. Customary units 132 3.58 1130 154 1280 1300 16 382 619 256 0040 104 14.3 581 270 , 4S1 247 306 232 29 215 245 21 15 23B 24.8 2,12 584 305 40.7 29 944 209 195 164 1250 3040 17 0830 I5B 158 1001100 40x 277 815 W36 x 302 89.0 w36 x 194 570 x277 815 397 0945 167 168 21100 16.7 121 126 12,t00 120 殴0 373 64 146 76 x 150 443 359 065 0.550 11.5 074 9900 39 130 415 w33 × 118 34.7 32.9 ×108 31.7 29.8 a545b0.5 n.76 4470 1.7 29.7 0320 105 067 273 110343 109 278 0SOİ0.1 299 7×114 33.6 W27 x 94275 W24 x 162 4. w24 × 104 W24×B4 24.7 6 269 0490 100 a745 3270 0.705 130 122 5170 414 307 241 .500 128 0.75 3100 258 10 24.1 0470 902 077 9.79 Z24 0.40 00 068 2100 836 085 30 24 x 76 22.4 23.9 83 R35 8317 1b1 A 67 814 195 183 06 170 181 57与 14.01.77 249 764 13 w21 x 83 244 21.4 a5i5 864 12 21 x 73215 212 0.455 945 818 110 5 146 747 123 x S0 14.7 208 380 653 0535 984 603 158 1.7 1120 W38 × 60 17.6 18.2 0.415 756 0696 984 612 w16 x 100 204 170 05104 0985 1490 95 764 081 127 5o1 133 107 4.7 180 355 75 057 118 179 0315 602 0.525 889 738 10 684 12L 784 w18 × 50 180 635 127 五7 251 934 157 70 152 9 340 1.32 71 198 2.7 665 823 565 651 640 384 626 442 w16 × 45 133 161 0.36 704 0.5 586 245 Wi6x 36 106 159 029%699 043 wi6 × 26 ⑦68 15.7 0.250 55 a345 3o1

7.28 Locate the X-X and Y-Y Centroidal axes for the built up structural steel areas shown below W12 x 40 W14 × 48 TABLE A. 1 U.S. Customary units (Continued) Designation A iniin. byin i, i $in. in , in W14 x 132 38.8 14.7 0.645 147 1.03 1530 209 628 234 58 745 3,76 w14 × 10932.0 14.3 0.525 14.6086 1240 ·73 622 192 447 612 33 w14 × 90 265 14.00440145071 999 143 14 157 362 499 W14 x 7A 218 142 0450 10.1 0.785 735 112 604 126 134 26 2.48 w14x61 179 139 035 100 0.545 640 92 102 107 215 2.45 W14x 48 14.1 13.8 038C3 0.595 48402585 784 1.4 128 1.91 wi4 x34 10.0 1400285 6750455 340 486 583 545 233 69114 W14 x 30 B8S 13.8 . 673 0.385 9 420 5.73 473 196 582 1.49 W14x 22 649 137 0230 50 0.335 19 20 5.54 33.2 70 28 104 w12 x 96 282 127 0.550 122 09 833 1315.44 147 444 309 W12 x 72 21.1 123 0.430 120 067 597 974 31 108 195 324 a04 W12 x 58 170 122 0.360 100 064475 80 528 864 107 214 2.51 W12 x50 146 122 0.370 808 064 39 642 518 719 563 139 196 w12 x 40 117 119 0295 801 0515 307 51.5 513 570 41 110 194 W12 × 3。879 12.3 0.260 652044 238 보6 21 41 203 . 6.24 152 648 12.30.260 403 0425 156 24 49293 466 2.3 0848 :w12 × 16 471 1200.220 399a265 103 171 467 201 282 1410773 wio x 112 329 114 055 10.4 125 716 126 466 147 236 453 2.68 w10 × 68 19.9 10.40470 10.1077 394 75.7 444 863 134 264 289 WIo x 54 15.8 10.1 0370 0.615 w10 ×45 13.3 10.10코080eo.62 248 49.1 4.32 549 53.4 13」20 w10 x 33 9.71 9.73 0.20 196 0435 171 35.0 4.19 388 366 92 1.94 w10 x 22 649 102 0.20 5.75 0.3611232 47 251 w10 x 12 3.54 987 019 396 021 538109 39 126 21811 08S wB x 40 11.7 825 0.360 8 056 146 355 35338 122 2.04 WB x 319.13 00 0285 80 0.435 0 275347 304 371 927 202 WB x 24 7.08 793 0245 65 04 827 209 32 23 183 563 1.6 w8 x 13 384 799 020 400255 396-9 gian i -n W6 x 25734 638 0320 608 0455534 67 27 189 51 1.52 w6 x12 3.55 6030.230 40 028 22.1 731 249 аз 1500918 100 0.615 303 0 437 666 103 206 256 114 397 1.33 83 416 0.280 406 0.345 11.3 546 1.72 386 190 1.00

7.22 A built up steel member is composed of a W21X62 wide flange section with a C12X25 American Standard channel welded to its top flange as shown. Locate haXX Centroidal axis. C12 × 25 W21 × 62 TABLE U.S. Customary units Avz. tr C15 x 50 147150 3.72 065 0716 079 4045385.241 C15 x 40 118 150 352 065 0520778 348 45 543 9.17 33 0.883 C12 x 30 881 120 317 050 0.51 064 62 27 429 5.12 .05 0.762 C12 x 25 734 12.0 305 asot 037 0674 144 24443 4.45 .87 0779 C12 x 20,7 608 12.0 294 0501 0282 068 129 21.5 461 386 172 097 C10 × 30 H.81 10:030304360673 0.649 103 7 343 393 165 0568 C10 × 20 5.87 100274 0.436a379 0.605 7H.9 15. 3.67 2.8 1.31 069 377 08品 10 × 15.3 4A8 1aa 26 0436024 a634 673135 388 223 m C6×105 307 6.02.030.343 0.3140.5 151 504 2.22 085 0 551 0 529 TABLE G2 S1 units em x Igim mm m mmm mm mm10 mm103mmmm 10im 103m mm C310 × 30.8 3920 35 74,7 12.7 C200 × 171 217。20g 57.4 991 559 14.5 135 .16 17 53.2 352 282 202 .133 79 0.545 :12. 13 826 12.1 583:467 728 123



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