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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » S Section Steel I Beam » S15 × 50
S Section 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 = 486 in4) for the S15 × 50 S Section 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: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 50.0 2.46 × 10-6 10.4 60.0 2.95 × 10-6 12.5 70.0 3.45 × 10-6 14.6 80.0 3.94 × 10-6 16.7 90.0 4.43 × 10-6 18.8 100 4.92 × 10-6 20.8 200 9.85 × 10-6 41.7 300 1.48 × 10-5 62.5 400 1.97 × 10-5 83.3 500 2.46 × 10-5 104 600 2.95 × 10-5 125 700 3.45 × 10-5 146 800 3.94 × 10-5 167 900 4.43 × 10-5 188 1000 4.92 × 10-5 208 2000 9.85 × 10-5 417 3000 1.48 × 10-4 625 4000 1.97 × 10-4 833 5000 2.46 × 10-4 1040 6000 2.95 × 10-4 1250 7000 3.45 × 10-4 1460 8000 3.94 × 10-4 1670 9000 4.43 × 10-4 1880 1.00 × 104 4.92 × 10-4 2080 2.00 × 104 9.85 × 10-4 4170 3.00 × 104 0.00148 6250 4.00 × 104 0.00197 8330 5.00 × 104 0.00246 1.04 × 104 6.00 × 104 0.00295 1.25 × 104 7.00 × 104 0.00345 1.46 × 104 8.00 × 104 0.00394 1.67 × 104 9.00 × 104 0.00443 1.88 × 104 1.00 × 105 0.00492 2.08 × 104 2.00 × 105 0.00985 4.17 × 104 3.00 × 105 0.0148 6.25 × 104 4.00 × 105 0.0197 8.33 × 104 5.00 × 105 0.0246 1.04 × 105 6.00 × 105 0.0295 1.25 × 105 7.00 × 105 0.0345 1.46 × 105 8.00 × 105 0.0394 1.67 × 105 9.00 × 105 0.0443 1.88 × 105 1.00 × 106 0.0492 2.08 × 105 1.43 × 106 0.0702 2.97 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 50.0 1.90 × 10-5 28.9 60.0 2.28 × 10-5 34.7 70.0 2.66 × 10-5 40.5 80.0 3.04 × 10-5 46.3 90.0 3.42 × 10-5 52.1 100 3.80 × 10-5 57.9 200 7.60 × 10-5 116 300 1.14 × 10-4 174 400 1.52 × 10-4 231 500 1.90 × 10-4 289 600 2.28 × 10-4 347 700 2.66 × 10-4 405 800 3.04 × 10-4 463 900 3.42 × 10-4 521 1000 3.80 × 10-4 579 2000 7.60 × 10-4 1160 3000 0.00114 1740 4000 0.00152 2310 5000 0.00190 2890 6000 0.00228 3470 7000 0.00266 4050 8000 0.00304 4630 9000 0.00342 5210 1.00 × 104 0.00380 5790 2.00 × 104 0.00760 1.16 × 104 3.00 × 104 0.0114 1.74 × 104 4.00 × 104 0.0152 2.31 × 104 5.00 × 104 0.0190 2.89 × 104 6.00 × 104 0.0228 3.47 × 104 7.00 × 104 0.0266 4.05 × 104 8.00 × 104 0.0304 4.63 × 104 9.00 × 104 0.0342 5.21 × 104 1.00 × 105 0.0380 5.79 × 104 2.00 × 105 0.0760 1.16 × 105 3.00 × 105 0.114 1.74 × 105 4.00 × 105 0.152 2.31 × 105 5.00 × 105 0.190 2.89 × 105 5.13 × 105 0.195 2.97 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 50.0 3.04 × 10-4 116 60.0 3.65 × 10-4 139 70.0 4.26 × 10-4 162 80.0 4.86 × 10-4 185 90.0 5.47 × 10-4 208 100 6.08 × 10-4 231 200 0.00122 463 300 0.00182 694 400 0.00243 926 500 0.00304 1160 600 0.00365 1390 700 0.00426 1620 800 0.00486 1850 900 0.00547 2080 1000 0.00608 2310 2000 0.0122 4630 3000 0.0182 6940 4000 0.0243 9260 5000 0.0304 1.16 × 104 6000 0.0365 1.39 × 104 7000 0.0426 1.62 × 104 8000 0.0486 1.85 × 104 9000 0.0547 2.08 × 104 1.00 × 104 0.0608 2.31 × 104 2.00 × 104 0.122 4.63 × 104 3.00 × 104 0.182 6.94 × 104 4.00 × 104 0.243 9.26 × 104 5.00 × 104 0.304 1.16 × 105 6.00 × 104 0.365 1.39 × 105 7.00 × 104 0.426 1.62 × 105 8.00 × 104 0.486 1.85 × 105 9.00 × 104 0.547 2.08 × 105 1.00 × 105 0.608 2.31 × 105 1.28 × 105 0.780 2.97 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 50.0 0.00154 260 60.0 0.00185 313 70.0 0.00215 365 80.0 0.00246 417 90.0 0.00277 469 100 0.00308 521 200 0.00616 1040 300 0.00923 1560 400 0.0123 2080 500 0.0154 2600 600 0.0185 3130 700 0.0215 3650 800 0.0246 4170 900 0.0277 4690 1000 0.0308 5210 2000 0.0616 1.04 × 104 3000 0.0923 1.56 × 104 4000 0.123 2.08 × 104 5000 0.154 2.60 × 104 6000 0.185 3.13 × 104 7000 0.215 3.65 × 104 8000 0.246 4.17 × 104 9000 0.277 4.69 × 104 1.00 × 104 0.308 5.21 × 104 2.00 × 104 0.616 1.04 × 105 3.00 × 104 0.923 1.56 × 105 4.00 × 104 1.23 2.08 × 105 5.00 × 104 1.54 2.60 × 105 5.70 × 104 1.76 2.97 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 50.0 0.00486 463 60.0 0.00584 556 70.0 0.00681 648 80.0 0.00778 741 90.0 0.00876 833 100 0.00973 926 200 0.0195 1850 300 0.0292 2780 400 0.0389 3700 500 0.0486 4630 600 0.0584 5560 700 0.0681 6480 800 0.0778 7410 900 0.0876 8330 1000 0.0973 9260 2000 0.195 1.85 × 104 3000 0.292 2.78 × 104 4000 0.389 3.70 × 104 5000 0.486 4.63 × 104 6000 0.584 5.56 × 104 7000 0.681 6.48 × 104 8000 0.778 7.41 × 104 9000 0.876 8.33 × 104 1.00 × 104 0.973 9.26 × 104 2.00 × 104 1.95 1.85 × 105 3.00 × 104 2.92 2.78 × 105 3.21 × 104 3.12 2.97 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 50.0 0.0119 723 60.0 0.0143 868 70.0 0.0166 1010 80.0 0.0190 1160 90.0 0.0214 1300 100 0.0238 1450 200 0.0475 2890 300 0.0713 4340 400 0.0950 5790 500 0.119 7230 600 0.143 8680 700 0.166 1.01 × 104 800 0.190 1.16 × 104 900 0.214 1.30 × 104 1000 0.238 1.45 × 104 2000 0.475 2.89 × 104 3000 0.713 4.34 × 104 4000 0.950 5.79 × 104 5000 1.19 7.23 × 104 6000 1.43 8.68 × 104 7000 1.66 1.01 × 105 8000 1.90 1.16 × 105 9000 2.14 1.30 × 105 1.00 × 104 2.38 1.45 × 105 2.00 × 104 4.75 2.89 × 105 2.05 × 104 4.88 2.97 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 50.0 0.0246 1040 60.0 0.0295 1250 70.0 0.0345 1460 80.0 0.0394 1670 90.0 0.0443 1880 100 0.0492 2080 200 0.0985 4170 300 0.148 6250 400 0.197 8330 500 0.246 1.04 × 104 600 0.295 1.25 × 104 700 0.345 1.46 × 104 800 0.394 1.67 × 104 900 0.443 1.88 × 104 1000 0.492 2.08 × 104 2000 0.985 4.17 × 104 3000 1.48 6.25 × 104 4000 1.97 8.33 × 104 5000 2.46 1.04 × 105 6000 2.95 1.25 × 105 7000 3.45 1.46 × 105 8000 3.94 1.67 × 105 9000 4.43 1.88 × 105 1.00 × 104 4.92 2.08 × 105 1.43 × 104 7.02 2.97 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 50.0 0.0778 1850 60.0 0.0934 2220 70.0 0.109 2590 80.0 0.125 2960 90.0 0.140 3330 100 0.156 3700 200 0.311 7410 300 0.467 1.11 × 104 400 0.623 1.48 × 104 500 0.778 1.85 × 104 600 0.934 2.22 × 104 700 1.09 2.59 × 104 800 1.25 2.96 × 104 900 1.40 3.33 × 104 1000 1.56 3.70 × 104 2000 3.11 7.41 × 104 3000 4.67 1.11 × 105 4000 6.23 1.48 × 105 5000 7.78 1.85 × 105 6000 9.34 2.22 × 105 7000 10.9 2.59 × 105 8000 12.5 2.96 × 105 8020 12.5 2.97 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 50.0 0.190 2890 60.0 0.228 3470 70.0 0.266 4050 80.0 0.304 4630 90.0 0.342 5210 100 0.380 5790 200 0.760 1.16 × 104 300 1.14 1.74 × 104 400 1.52 2.31 × 104 500 1.90 2.89 × 104 600 2.28 3.47 × 104 700 2.66 4.05 × 104 800 3.04 4.63 × 104 900 3.42 5.21 × 104 1000 3.80 5.79 × 104 2000 7.60 1.16 × 105 3000 11.4 1.74 × 105 3950 15.0 2.28 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 50.0 0.394 4170 60.0 0.473 5000 70.0 0.552 5830 80.0 0.630 6670 90.0 0.709 7500 100 0.788 8330 200 1.58 1.67 × 104 300 2.36 2.50 × 104 400 3.15 3.33 × 104 500 3.94 4.17 × 104 600 4.73 5.00 × 104 700 5.52 5.83 × 104 800 6.30 6.67 × 104 900 7.09 7.50 × 104 1000 7.88 8.33 × 104 1900 15.0 1.59 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 50.0 0.730 5670 60.0 0.876 6810 70.0 1.02 7940 80.0 1.17 9070 90.0 1.31 1.02 × 104 100 1.46 1.13 × 104 200 2.92 2.27 × 104 300 4.38 3.40 × 104 400 5.84 4.54 × 104 500 7.30 5.67 × 104 600 8.76 6.81 × 104 700 10.2 7.94 × 104 800 11.7 9.07 × 104 900 13.1 1.02 × 105 1000 14.6 1.13 × 105 1030 15.0 1.17 × 105
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 50.0 1.25 7410 60.0 1.49 8890 70.0 1.74 1.04 × 104 80.0 1.99 1.19 × 104 90.0 2.24 1.33 × 104 100 2.49 1.48 × 104 200 4.98 2.96 × 104 300 7.47 4.44 × 104 400 9.96 5.93 × 104 500 12.5 7.41 × 104 600 14.9 8.89 × 104 602 15.0 8.92 × 104
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 50.0 1.99 9380 60.0 2.39 1.13 × 104 70.0 2.79 1.31 × 104 80.0 3.19 1.50 × 104 90.0 3.59 1.69 × 104 100 3.99 1.88 × 104 200 7.98 3.75 × 104 300 12.0 5.63 × 104 376 15.0 7.05 × 104
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 50.0 3.04 1.16 × 104 60.0 3.65 1.39 × 104 70.0 4.26 1.62 × 104 80.0 4.86 1.85 × 104 90.0 5.47 2.08 × 104 100 6.08 2.31 × 104 200 12.2 4.63 × 104 247 15.0 5.71 × 104
 Steel I Beam: S15 × 50 (S15 inch tall × 50 lbf/ft) L = 125 ft (lbf/ft) (in) (psi) 50.0 7.42 1.81 × 104 60.0 8.91 2.17 × 104 70.0 10.4 2.53 × 104 80.0 11.9 2.89 × 104 90.0 13.4 3.26 × 104 100 14.8 3.62 × 104 101 15.0 3.65 × 104
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