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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W12 × 26
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in three equal spans, we compute the displacement at the middle of the first and the third spans, and the maximum normal stress occuring at the second and third supports of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 204 in4) for the W12 × 26 Wide Flange Steel I Beam and the typical Young's modulus (E = 3.046 × 107 psi) of steels. Note that the typical yielding stress of steels can range from 1.015 × 104 to 2.970 × 105 psi. The purpose of this page is to give a rough estimation of the load-bearing capacity of this particular beam, rather than a guideline for designing actual building structures. Please check your local building codes for regulatory requirements.
Note: The weight of the beam itself is not included in the calculation.

 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 26.0 3.98 × 10-6 8.41 30.0 4.60 × 10-6 9.70 40.0 6.13 × 10-6 12.9 50.0 7.66 × 10-6 16.2 60.0 9.19 × 10-6 19.4 70.0 1.07 × 10-5 22.6 80.0 1.23 × 10-5 25.9 90.0 1.38 × 10-5 29.1 100 1.53 × 10-5 32.3 200 3.06 × 10-5 64.7 300 4.60 × 10-5 97.0 400 6.13 × 10-5 129 500 7.66 × 10-5 162 600 9.19 × 10-5 194 700 1.07 × 10-4 226 800 1.23 × 10-4 259 900 1.38 × 10-4 291 1000 1.53 × 10-4 323 2000 3.06 × 10-4 647 3000 4.60 × 10-4 970 4000 6.13 × 10-4 1290 5000 7.66 × 10-4 1620 6000 9.19 × 10-4 1940 7000 0.00107 2260 8000 0.00123 2590 9000 0.00138 2910 1.00 × 104 0.00153 3230 2.00 × 104 0.00306 6470 3.00 × 104 0.00460 9700 4.00 × 104 0.00613 1.29 × 104 5.00 × 104 0.00766 1.62 × 104 6.00 × 104 0.00919 1.94 × 104 7.00 × 104 0.0107 2.26 × 104 8.00 × 104 0.0123 2.59 × 104 9.00 × 104 0.0138 2.91 × 104 1.00 × 105 0.0153 3.23 × 104 2.00 × 105 0.0306 6.47 × 104 3.00 × 105 0.0460 9.70 × 104 4.00 × 105 0.0613 1.29 × 105 5.00 × 105 0.0766 1.62 × 105 6.00 × 105 0.0919 1.94 × 105 7.00 × 105 0.107 2.26 × 105 8.00 × 105 0.123 2.59 × 105 9.00 × 105 0.138 2.91 × 105 9.18 × 105 0.141 2.97 × 105
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 26.0 3.07 × 10-5 23.4 30.0 3.55 × 10-5 27.0 40.0 4.73 × 10-5 35.9 50.0 5.91 × 10-5 44.9 60.0 7.09 × 10-5 53.9 70.0 8.27 × 10-5 62.9 80.0 9.46 × 10-5 71.9 90.0 1.06 × 10-4 80.9 100 1.18 × 10-4 89.9 200 2.36 × 10-4 180 300 3.55 × 10-4 270 400 4.73 × 10-4 359 500 5.91 × 10-4 449 600 7.09 × 10-4 539 700 8.27 × 10-4 629 800 9.46 × 10-4 719 900 0.00106 809 1000 0.00118 899 2000 0.00236 1800 3000 0.00355 2700 4000 0.00473 3590 5000 0.00591 4490 6000 0.00709 5390 7000 0.00827 6290 8000 0.00946 7190 9000 0.0106 8090 1.00 × 104 0.0118 8990 2.00 × 104 0.0236 1.80 × 104 3.00 × 104 0.0355 2.70 × 104 4.00 × 104 0.0473 3.59 × 104 5.00 × 104 0.0591 4.49 × 104 6.00 × 104 0.0709 5.39 × 104 7.00 × 104 0.0827 6.29 × 104 8.00 × 104 0.0946 7.19 × 104 9.00 × 104 0.106 8.09 × 104 1.00 × 105 0.118 8.99 × 104 2.00 × 105 0.236 1.80 × 105 3.00 × 105 0.355 2.70 × 105 3.31 × 105 0.391 2.97 × 105
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 26.0 4.92 × 10-4 93.4 30.0 5.67 × 10-4 108 40.0 7.56 × 10-4 144 50.0 9.46 × 10-4 180 60.0 0.00113 216 70.0 0.00132 252 80.0 0.00151 288 90.0 0.00170 323 100 0.00189 359 200 0.00378 719 300 0.00567 1080 400 0.00756 1440 500 0.00946 1800 600 0.0113 2160 700 0.0132 2520 800 0.0151 2880 900 0.0170 3230 1000 0.0189 3590 2000 0.0378 7190 3000 0.0567 1.08 × 104 4000 0.0756 1.44 × 104 5000 0.0946 1.80 × 104 6000 0.113 2.16 × 104 7000 0.132 2.52 × 104 8000 0.151 2.88 × 104 9000 0.170 3.23 × 104 1.00 × 104 0.189 3.59 × 104 2.00 × 104 0.378 7.19 × 104 3.00 × 104 0.567 1.08 × 105 4.00 × 104 0.756 1.44 × 105 5.00 × 104 0.946 1.80 × 105 6.00 × 104 1.13 2.16 × 105 7.00 × 104 1.32 2.52 × 105 8.00 × 104 1.51 2.88 × 105 8.26 × 104 1.56 2.97 × 105
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 26.0 0.00249 210 30.0 0.00287 243 40.0 0.00383 323 50.0 0.00479 404 60.0 0.00574 485 70.0 0.00670 566 80.0 0.00766 647 90.0 0.00862 728 100 0.00957 809 200 0.0191 1620 300 0.0287 2430 400 0.0383 3230 500 0.0479 4040 600 0.0574 4850 700 0.0670 5660 800 0.0766 6470 900 0.0862 7280 1000 0.0957 8090 2000 0.191 1.62 × 104 3000 0.287 2.43 × 104 4000 0.383 3.23 × 104 5000 0.479 4.04 × 104 6000 0.574 4.85 × 104 7000 0.670 5.66 × 104 8000 0.766 6.47 × 104 9000 0.862 7.28 × 104 1.00 × 104 0.957 8.09 × 104 2.00 × 104 1.91 1.62 × 105 3.00 × 104 2.87 2.43 × 105 3.67 × 104 3.52 2.97 × 105
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 26.0 0.00787 374 30.0 0.00908 431 40.0 0.0121 575 50.0 0.0151 719 60.0 0.0182 863 70.0 0.0212 1010 80.0 0.0242 1150 90.0 0.0272 1290 100 0.0303 1440 200 0.0605 2880 300 0.0908 4310 400 0.121 5750 500 0.151 7190 600 0.182 8630 700 0.212 1.01 × 104 800 0.242 1.15 × 104 900 0.272 1.29 × 104 1000 0.303 1.44 × 104 2000 0.605 2.88 × 104 3000 0.908 4.31 × 104 4000 1.21 5.75 × 104 5000 1.51 7.19 × 104 6000 1.82 8.63 × 104 7000 2.12 1.01 × 105 8000 2.42 1.15 × 105 9000 2.72 1.29 × 105 1.00 × 104 3.03 1.44 × 105 2.00 × 104 6.05 2.88 × 105 2.07 × 104 6.25 2.97 × 105
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 26.0 0.0192 584 30.0 0.0222 674 40.0 0.0295 899 50.0 0.0369 1120 60.0 0.0443 1350 70.0 0.0517 1570 80.0 0.0591 1800 90.0 0.0665 2020 100 0.0739 2250 200 0.148 4490 300 0.222 6740 400 0.295 8990 500 0.369 1.12 × 104 600 0.443 1.35 × 104 700 0.517 1.57 × 104 800 0.591 1.80 × 104 900 0.665 2.02 × 104 1000 0.739 2.25 × 104 2000 1.48 4.49 × 104 3000 2.22 6.74 × 104 4000 2.95 8.99 × 104 5000 3.69 1.12 × 105 6000 4.43 1.35 × 105 7000 5.17 1.57 × 105 8000 5.91 1.80 × 105 9000 6.65 2.02 × 105 1.00 × 104 7.39 2.25 × 105 1.32 × 104 9.77 2.97 × 105
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 26.0 0.0398 841 30.0 0.0460 970 40.0 0.0613 1290 50.0 0.0766 1620 60.0 0.0919 1940 70.0 0.107 2260 80.0 0.123 2590 90.0 0.138 2910 100 0.153 3230 200 0.306 6470 300 0.460 9700 400 0.613 1.29 × 104 500 0.766 1.62 × 104 600 0.919 1.94 × 104 700 1.07 2.26 × 104 800 1.23 2.59 × 104 900 1.38 2.91 × 104 1000 1.53 3.23 × 104 2000 3.06 6.47 × 104 3000 4.60 9.70 × 104 4000 6.13 1.29 × 105 5000 7.66 1.62 × 105 6000 9.19 1.94 × 105 7000 10.7 2.26 × 105 7980 12.2 2.58 × 105
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 26.0 0.126 1500 30.0 0.145 1730 40.0 0.194 2300 50.0 0.242 2880 60.0 0.290 3450 70.0 0.339 4030 80.0 0.387 4600 90.0 0.436 5180 100 0.484 5750 200 0.968 1.15 × 104 300 1.45 1.73 × 104 400 1.94 2.30 × 104 500 2.42 2.88 × 104 600 2.90 3.45 × 104 700 3.39 4.03 × 104 800 3.87 4.60 × 104 900 4.36 5.18 × 104 1000 4.84 5.75 × 104 2000 9.68 1.15 × 105 2520 12.2 1.45 × 105
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 26.0 0.307 2340 30.0 0.355 2700 40.0 0.473 3590 50.0 0.591 4490 60.0 0.709 5390 70.0 0.827 6290 80.0 0.946 7190 90.0 1.06 8090 100 1.18 8990 200 2.36 1.80 × 104 300 3.55 2.70 × 104 400 4.73 3.59 × 104 500 5.91 4.49 × 104 600 7.09 5.39 × 104 700 8.27 6.29 × 104 800 9.46 7.19 × 104 900 10.6 8.09 × 104 1000 11.8 8.99 × 104 1030 12.2 9.29 × 104
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 26.0 0.637 3360 30.0 0.735 3880 40.0 0.980 5180 50.0 1.23 6470 60.0 1.47 7760 70.0 1.72 9060 80.0 1.96 1.04 × 104 90.0 2.21 1.16 × 104 100 2.45 1.29 × 104 200 4.90 2.59 × 104 300 7.35 3.88 × 104 400 9.80 5.18 × 104 499 12.2 6.45 × 104
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 26.0 1.18 4580 30.0 1.36 5280 40.0 1.82 7040 50.0 2.27 8810 60.0 2.72 1.06 × 104 70.0 3.18 1.23 × 104 80.0 3.63 1.41 × 104 90.0 4.09 1.59 × 104 100 4.54 1.76 × 104 200 9.08 3.52 × 104 269 12.2 4.74 × 104
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 26.0 2.01 5980 30.0 2.32 6900 40.0 3.10 9200 50.0 3.87 1.15 × 104 60.0 4.65 1.38 × 104 70.0 5.42 1.61 × 104 80.0 6.20 1.84 × 104 90.0 6.97 2.07 × 104 100 7.75 2.30 × 104 158 12.2 3.63 × 104
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 26.0 3.23 7570 30.0 3.72 8730 40.0 4.96 1.16 × 104 50.0 6.20 1.46 × 104 60.0 7.44 1.75 × 104 70.0 8.69 2.04 × 104 80.0 9.93 2.33 × 104 90.0 11.2 2.62 × 104 98.5 12.2 2.87 × 104
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 26.0 4.92 9340 30.0 5.67 1.08 × 104 40.0 7.56 1.44 × 104 50.0 9.46 1.80 × 104 60.0 11.3 2.16 × 104 64.6 12.2 2.32 × 104
 Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft) L = 125 ft (lbf/ft) (in) (psi) 26.0 12.0 1.46 × 104 26.5 12.2 1.49 × 104