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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W12 × 72
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in two equal spans, we compute the displacement at the middle of each span and the maximum normal stress occuring at the center support of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 597 in4) for the W12 × 72 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 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 72.0 2.89 × 10-6 9.97 80.0 3.21 × 10-6 11.1 90.0 3.61 × 10-6 12.5 100 4.01 × 10-6 13.9 200 8.02 × 10-6 27.7 300 1.20 × 10-5 41.6 400 1.60 × 10-5 55.4 500 2.00 × 10-5 69.3 600 2.41 × 10-5 83.1 700 2.81 × 10-5 97.0 800 3.21 × 10-5 111 900 3.61 × 10-5 125 1000 4.01 × 10-5 139 2000 8.02 × 10-5 277 3000 1.20 × 10-4 416 4000 1.60 × 10-4 554 5000 2.00 × 10-4 693 6000 2.41 × 10-4 831 7000 2.81 × 10-4 970 8000 3.21 × 10-4 1110 9000 3.61 × 10-4 1250 1.00 × 104 4.01 × 10-4 1390 2.00 × 104 8.02 × 10-4 2770 3.00 × 104 0.00120 4160 4.00 × 104 0.00160 5540 5.00 × 104 0.00200 6930 6.00 × 104 0.00241 8310 7.00 × 104 0.00281 9700 8.00 × 104 0.00321 1.11 × 104 9.00 × 104 0.00361 1.25 × 104 1.00 × 105 0.00401 1.39 × 104 2.00 × 105 0.00802 2.77 × 104 3.00 × 105 0.0120 4.16 × 104 4.00 × 105 0.0160 5.54 × 104 5.00 × 105 0.0200 6.93 × 104 6.00 × 105 0.0241 8.31 × 104 7.00 × 105 0.0281 9.70 × 104 8.00 × 105 0.0321 1.11 × 105 9.00 × 105 0.0361 1.25 × 105 1.00 × 106 0.0401 1.39 × 105 2.00 × 106 0.0802 2.77 × 105 2.14 × 106 0.0860 2.97 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 72.0 2.23 × 10-5 27.7 80.0 2.47 × 10-5 30.8 90.0 2.78 × 10-5 34.6 100 3.09 × 10-5 38.5 200 6.19 × 10-5 76.9 300 9.28 × 10-5 115 400 1.24 × 10-4 154 500 1.55 × 10-4 192 600 1.86 × 10-4 231 700 2.17 × 10-4 269 800 2.47 × 10-4 308 900 2.78 × 10-4 346 1000 3.09 × 10-4 385 2000 6.19 × 10-4 769 3000 9.28 × 10-4 1150 4000 0.00124 1540 5000 0.00155 1920 6000 0.00186 2310 7000 0.00217 2690 8000 0.00247 3080 9000 0.00278 3460 1.00 × 104 0.00309 3850 2.00 × 104 0.00619 7690 3.00 × 104 0.00928 1.15 × 104 4.00 × 104 0.0124 1.54 × 104 5.00 × 104 0.0155 1.92 × 104 6.00 × 104 0.0186 2.31 × 104 7.00 × 104 0.0217 2.69 × 104 8.00 × 104 0.0247 3.08 × 104 9.00 × 104 0.0278 3.46 × 104 1.00 × 105 0.0309 3.85 × 104 2.00 × 105 0.0619 7.69 × 104 3.00 × 105 0.0928 1.15 × 105 4.00 × 105 0.124 1.54 × 105 5.00 × 105 0.155 1.92 × 105 6.00 × 105 0.186 2.31 × 105 7.00 × 105 0.217 2.69 × 105 7.72 × 105 0.239 2.97 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 72.0 3.56 × 10-4 111 80.0 3.96 × 10-4 123 90.0 4.45 × 10-4 139 100 4.95 × 10-4 154 200 9.90 × 10-4 308 300 0.00148 462 400 0.00198 616 500 0.00247 769 600 0.00297 923 700 0.00346 1080 800 0.00396 1230 900 0.00445 1390 1000 0.00495 1540 2000 0.00990 3080 3000 0.0148 4620 4000 0.0198 6160 5000 0.0247 7690 6000 0.0297 9230 7000 0.0346 1.08 × 104 8000 0.0396 1.23 × 104 9000 0.0445 1.39 × 104 1.00 × 104 0.0495 1.54 × 104 2.00 × 104 0.0990 3.08 × 104 3.00 × 104 0.148 4.62 × 104 4.00 × 104 0.198 6.16 × 104 5.00 × 104 0.247 7.69 × 104 6.00 × 104 0.297 9.23 × 104 7.00 × 104 0.346 1.08 × 105 8.00 × 104 0.396 1.23 × 105 9.00 × 104 0.445 1.39 × 105 1.00 × 105 0.495 1.54 × 105 1.93 × 105 0.955 2.97 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 72.0 0.00180 249 80.0 0.00200 277 90.0 0.00226 312 100 0.00251 346 200 0.00501 693 300 0.00752 1040 400 0.0100 1390 500 0.0125 1730 600 0.0150 2080 700 0.0175 2420 800 0.0200 2770 900 0.0226 3120 1000 0.0251 3460 2000 0.0501 6930 3000 0.0752 1.04 × 104 4000 0.100 1.39 × 104 5000 0.125 1.73 × 104 6000 0.150 2.08 × 104 7000 0.175 2.42 × 104 8000 0.200 2.77 × 104 9000 0.226 3.12 × 104 1.00 × 104 0.251 3.46 × 104 2.00 × 104 0.501 6.93 × 104 3.00 × 104 0.752 1.04 × 105 4.00 × 104 1.00 1.39 × 105 5.00 × 104 1.25 1.73 × 105 6.00 × 104 1.50 2.08 × 105 7.00 × 104 1.75 2.42 × 105 8.00 × 104 2.00 2.77 × 105 8.58 × 104 2.15 2.97 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 72.0 0.00570 443 80.0 0.00634 492 90.0 0.00713 554 100 0.00792 616 200 0.0158 1230 300 0.0238 1850 400 0.0317 2460 500 0.0396 3080 600 0.0475 3690 700 0.0554 4310 800 0.0634 4920 900 0.0713 5540 1000 0.0792 6160 2000 0.158 1.23 × 104 3000 0.238 1.85 × 104 4000 0.317 2.46 × 104 5000 0.396 3.08 × 104 6000 0.475 3.69 × 104 7000 0.554 4.31 × 104 8000 0.634 4.92 × 104 9000 0.713 5.54 × 104 1.00 × 104 0.792 6.16 × 104 2.00 × 104 1.58 1.23 × 105 3.00 × 104 2.38 1.85 × 105 4.00 × 104 3.17 2.46 × 105 4.83 × 104 3.82 2.97 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 72.0 0.0139 693 80.0 0.0155 769 90.0 0.0174 866 100 0.0193 962 200 0.0387 1920 300 0.0580 2890 400 0.0773 3850 500 0.0967 4810 600 0.116 5770 700 0.135 6730 800 0.155 7690 900 0.174 8660 1000 0.193 9620 2000 0.387 1.92 × 104 3000 0.580 2.89 × 104 4000 0.773 3.85 × 104 5000 0.967 4.81 × 104 6000 1.16 5.77 × 104 7000 1.35 6.73 × 104 8000 1.55 7.69 × 104 9000 1.74 8.66 × 104 1.00 × 104 1.93 9.62 × 104 2.00 × 104 3.87 1.92 × 105 3.00 × 104 5.80 2.89 × 105 3.09 × 104 5.97 2.97 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 72.0 0.0289 997 80.0 0.0321 1110 90.0 0.0361 1250 100 0.0401 1390 200 0.0802 2770 300 0.120 4160 400 0.160 5540 500 0.200 6930 600 0.241 8310 700 0.281 9700 800 0.321 1.11 × 104 900 0.361 1.25 × 104 1000 0.401 1.39 × 104 2000 0.802 2.77 × 104 3000 1.20 4.16 × 104 4000 1.60 5.54 × 104 5000 2.00 6.93 × 104 6000 2.41 8.31 × 104 7000 2.81 9.70 × 104 8000 3.21 1.11 × 105 9000 3.61 1.25 × 105 1.00 × 104 4.01 1.39 × 105 2.00 × 104 8.02 2.77 × 105 2.14 × 104 8.60 2.97 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 72.0 0.0912 1770 80.0 0.101 1970 90.0 0.114 2220 100 0.127 2460 200 0.253 4920 300 0.380 7390 400 0.507 9850 500 0.634 1.23 × 104 600 0.760 1.48 × 104 700 0.887 1.72 × 104 800 1.01 1.97 × 104 900 1.14 2.22 × 104 1000 1.27 2.46 × 104 2000 2.53 4.92 × 104 3000 3.80 7.39 × 104 4000 5.07 9.85 × 104 5000 6.34 1.23 × 105 6000 7.60 1.48 × 105 7000 8.87 1.72 × 105 8000 10.1 1.97 × 105 9000 11.4 2.22 × 105 9670 12.3 2.38 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 72.0 0.223 2770 80.0 0.247 3080 90.0 0.278 3460 100 0.309 3850 200 0.619 7690 300 0.928 1.15 × 104 400 1.24 1.54 × 104 500 1.55 1.92 × 104 600 1.86 2.31 × 104 700 2.17 2.69 × 104 800 2.47 3.08 × 104 900 2.78 3.46 × 104 1000 3.09 3.85 × 104 2000 6.19 7.69 × 104 3000 9.28 1.15 × 105 3960 12.3 1.52 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 72.0 0.462 3990 80.0 0.513 4430 90.0 0.577 4990 100 0.641 5540 200 1.28 1.11 × 104 300 1.92 1.66 × 104 400 2.57 2.22 × 104 500 3.21 2.77 × 104 600 3.85 3.32 × 104 700 4.49 3.88 × 104 800 5.13 4.43 × 104 900 5.77 4.99 × 104 1000 6.41 5.54 × 104 1910 12.3 1.06 × 105
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 72.0 0.856 5430 80.0 0.951 6030 90.0 1.07 6790 100 1.19 7540 200 2.38 1.51 × 104 300 3.57 2.26 × 104 400 4.75 3.02 × 104 500 5.94 3.77 × 104 600 7.13 4.52 × 104 700 8.32 5.28 × 104 800 9.51 6.03 × 104 900 10.7 6.79 × 104 1000 11.9 7.54 × 104 1030 12.3 7.77 × 104
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 72.0 1.46 7090 80.0 1.62 7880 90.0 1.82 8860 100 2.03 9850 200 4.05 1.97 × 104 300 6.08 2.95 × 104 400 8.11 3.94 × 104 500 10.1 4.92 × 104 600 12.2 5.91 × 104 604 12.3 5.95 × 104
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 72.0 2.34 8980 80.0 2.60 9970 90.0 2.92 1.12 × 104 100 3.25 1.25 × 104 200 6.49 2.49 × 104 300 9.74 3.74 × 104 377 12.3 4.70 × 104
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 72.0 3.56 1.11 × 104 80.0 3.96 1.23 × 104 90.0 4.45 1.39 × 104 100 4.95 1.54 × 104 200 9.90 3.08 × 104 247 12.3 3.81 × 104
 Steel I Beam: W12 × 72 (Wide Flange 12 inch tall × 72 lbf/ft) L = 125 ft (lbf/ft) (in) (psi) 72.0 8.70 1.73 × 104 80.0 9.67 1.92 × 104 90.0 10.9 2.16 × 104 100 12.1 2.40 × 104 101 12.3 2.44 × 104