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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W14 × 145
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 = 1710 in4) for the W14 × 145 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: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 145 2.65 × 10-6 6.77 200 3.65 × 10-6 9.33 300 5.48 × 10-6 14.0 400 7.31 × 10-6 18.7 500 9.14 × 10-6 23.3 600 1.10 × 10-5 28.0 700 1.28 × 10-5 32.7 800 1.46 × 10-5 37.3 900 1.64 × 10-5 42.0 1000 1.83 × 10-5 46.7 2000 3.65 × 10-5 93.3 3000 5.48 × 10-5 140 4000 7.31 × 10-5 187 5000 9.14 × 10-5 233 6000 1.10 × 10-4 280 7000 1.28 × 10-4 327 8000 1.46 × 10-4 373 9000 1.64 × 10-4 420 1.00 × 104 1.83 × 10-4 467 2.00 × 104 3.65 × 10-4 933 3.00 × 104 5.48 × 10-4 1400 4.00 × 104 7.31 × 10-4 1870 5.00 × 104 9.14 × 10-4 2330 6.00 × 104 0.00110 2800 7.00 × 104 0.00128 3270 8.00 × 104 0.00146 3730 9.00 × 104 0.00164 4200 1.00 × 105 0.00183 4670 2.00 × 105 0.00365 9330 3.00 × 105 0.00548 1.40 × 104 4.00 × 105 0.00731 1.87 × 104 5.00 × 105 0.00914 2.33 × 104 6.00 × 105 0.0110 2.80 × 104 7.00 × 105 0.0128 3.27 × 104 8.00 × 105 0.0146 3.73 × 104 9.00 × 105 0.0164 4.20 × 104 1.00 × 106 0.0183 4.67 × 104 2.00 × 106 0.0365 9.33 × 104 3.00 × 106 0.0548 1.40 × 105 4.00 × 106 0.0731 1.87 × 105 5.00 × 106 0.0914 2.33 × 105 6.00 × 106 0.110 2.80 × 105 6.36 × 106 0.116 2.97 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 145 2.04 × 10-5 18.8 200 2.82 × 10-5 25.9 300 4.23 × 10-5 38.9 400 5.64 × 10-5 51.9 500 7.05 × 10-5 64.8 600 8.46 × 10-5 77.8 700 9.87 × 10-5 90.8 800 1.13 × 10-4 104 900 1.27 × 10-4 117 1000 1.41 × 10-4 130 2000 2.82 × 10-4 259 3000 4.23 × 10-4 389 4000 5.64 × 10-4 519 5000 7.05 × 10-4 648 6000 8.46 × 10-4 778 7000 9.87 × 10-4 908 8000 0.00113 1040 9000 0.00127 1170 1.00 × 104 0.00141 1300 2.00 × 104 0.00282 2590 3.00 × 104 0.00423 3890 4.00 × 104 0.00564 5190 5.00 × 104 0.00705 6480 6.00 × 104 0.00846 7780 7.00 × 104 0.00987 9080 8.00 × 104 0.0113 1.04 × 104 9.00 × 104 0.0127 1.17 × 104 1.00 × 105 0.0141 1.30 × 104 2.00 × 105 0.0282 2.59 × 104 3.00 × 105 0.0423 3.89 × 104 4.00 × 105 0.0564 5.19 × 104 5.00 × 105 0.0705 6.48 × 104 6.00 × 105 0.0846 7.78 × 104 7.00 × 105 0.0987 9.08 × 104 8.00 × 105 0.113 1.04 × 105 9.00 × 105 0.127 1.17 × 105 1.00 × 106 0.141 1.30 × 105 2.00 × 106 0.282 2.59 × 105 2.29 × 106 0.323 2.97 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 145 3.27 × 10-4 75.2 200 4.51 × 10-4 104 300 6.77 × 10-4 156 400 9.02 × 10-4 207 500 0.00113 259 600 0.00135 311 700 0.00158 363 800 0.00180 415 900 0.00203 467 1000 0.00226 519 2000 0.00451 1040 3000 0.00677 1560 4000 0.00902 2070 5000 0.0113 2590 6000 0.0135 3110 7000 0.0158 3630 8000 0.0180 4150 9000 0.0203 4670 1.00 × 104 0.0226 5190 2.00 × 104 0.0451 1.04 × 104 3.00 × 104 0.0677 1.56 × 104 4.00 × 104 0.0902 2.07 × 104 5.00 × 104 0.113 2.59 × 104 6.00 × 104 0.135 3.11 × 104 7.00 × 104 0.158 3.63 × 104 8.00 × 104 0.180 4.15 × 104 9.00 × 104 0.203 4.67 × 104 1.00 × 105 0.226 5.19 × 104 2.00 × 105 0.451 1.04 × 105 3.00 × 105 0.677 1.56 × 105 4.00 × 105 0.902 2.07 × 105 5.00 × 105 1.13 2.59 × 105 5.73 × 105 1.29 2.97 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 145 0.00166 169 200 0.00228 233 300 0.00343 350 400 0.00457 467 500 0.00571 583 600 0.00685 700 700 0.00800 817 800 0.00914 933 900 0.0103 1050 1000 0.0114 1170 2000 0.0228 2330 3000 0.0343 3500 4000 0.0457 4670 5000 0.0571 5830 6000 0.0685 7000 7000 0.0800 8170 8000 0.0914 9330 9000 0.103 1.05 × 104 1.00 × 104 0.114 1.17 × 104 2.00 × 104 0.228 2.33 × 104 3.00 × 104 0.343 3.50 × 104 4.00 × 104 0.457 4.67 × 104 5.00 × 104 0.571 5.83 × 104 6.00 × 104 0.685 7.00 × 104 7.00 × 104 0.800 8.17 × 104 8.00 × 104 0.914 9.33 × 104 9.00 × 104 1.03 1.05 × 105 1.00 × 105 1.14 1.17 × 105 2.00 × 105 2.28 2.33 × 105 2.55 × 105 2.91 2.97 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 145 0.00523 301 200 0.00722 415 300 0.0108 622 400 0.0144 830 500 0.0180 1040 600 0.0217 1240 700 0.0253 1450 800 0.0289 1660 900 0.0325 1870 1000 0.0361 2070 2000 0.0722 4150 3000 0.108 6220 4000 0.144 8300 5000 0.180 1.04 × 104 6000 0.217 1.24 × 104 7000 0.253 1.45 × 104 8000 0.289 1.66 × 104 9000 0.325 1.87 × 104 1.00 × 104 0.361 2.07 × 104 2.00 × 104 0.722 4.15 × 104 3.00 × 104 1.08 6.22 × 104 4.00 × 104 1.44 8.30 × 104 5.00 × 104 1.80 1.04 × 105 6.00 × 104 2.17 1.24 × 105 7.00 × 104 2.53 1.45 × 105 8.00 × 104 2.89 1.66 × 105 9.00 × 104 3.25 1.87 × 105 1.00 × 105 3.61 2.07 × 105 1.43 × 105 5.17 2.97 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 145 0.0128 470 200 0.0176 648 300 0.0264 972 400 0.0353 1300 500 0.0441 1620 600 0.0529 1940 700 0.0617 2270 800 0.0705 2590 900 0.0793 2920 1000 0.0881 3240 2000 0.176 6480 3000 0.264 9720 4000 0.353 1.30 × 104 5000 0.441 1.62 × 104 6000 0.529 1.94 × 104 7000 0.617 2.27 × 104 8000 0.705 2.59 × 104 9000 0.793 2.92 × 104 1.00 × 104 0.881 3.24 × 104 2.00 × 104 1.76 6.48 × 104 3.00 × 104 2.64 9.72 × 104 4.00 × 104 3.53 1.30 × 105 5.00 × 104 4.41 1.62 × 105 6.00 × 104 5.29 1.94 × 105 7.00 × 104 6.17 2.27 × 105 8.00 × 104 7.05 2.59 × 105 9.00 × 104 7.93 2.92 × 105 9.16 × 104 8.08 2.97 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 145 0.0265 677 200 0.0365 933 300 0.0548 1400 400 0.0731 1870 500 0.0914 2330 600 0.110 2800 700 0.128 3270 800 0.146 3730 900 0.164 4200 1000 0.183 4670 2000 0.365 9330 3000 0.548 1.40 × 104 4000 0.731 1.87 × 104 5000 0.914 2.33 × 104 6000 1.10 2.80 × 104 7000 1.28 3.27 × 104 8000 1.46 3.73 × 104 9000 1.64 4.20 × 104 1.00 × 104 1.83 4.67 × 104 2.00 × 104 3.65 9.33 × 104 3.00 × 104 5.48 1.40 × 105 4.00 × 104 7.31 1.87 × 105 5.00 × 104 9.14 2.33 × 105 6.00 × 104 11.0 2.80 × 105 6.36 × 104 11.6 2.97 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 145 0.0837 1200 200 0.116 1660 300 0.173 2490 400 0.231 3320 500 0.289 4150 600 0.347 4980 700 0.404 5810 800 0.462 6640 900 0.520 7470 1000 0.578 8300 2000 1.16 1.66 × 104 3000 1.73 2.49 × 104 4000 2.31 3.32 × 104 5000 2.89 4.15 × 104 6000 3.47 4.98 × 104 7000 4.04 5.81 × 104 8000 4.62 6.64 × 104 9000 5.20 7.47 × 104 1.00 × 104 5.78 8.30 × 104 2.00 × 104 11.6 1.66 × 105 2.56 × 104 14.8 2.12 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 145 0.204 1880 200 0.282 2590 300 0.423 3890 400 0.564 5190 500 0.705 6480 600 0.846 7780 700 0.987 9080 800 1.13 1.04 × 104 900 1.27 1.17 × 104 1000 1.41 1.30 × 104 2000 2.82 2.59 × 104 3000 4.23 3.89 × 104 4000 5.64 5.19 × 104 5000 7.05 6.48 × 104 6000 8.46 7.78 × 104 7000 9.87 9.08 × 104 8000 11.3 1.04 × 105 9000 12.7 1.17 × 105 1.00 × 104 14.1 1.30 × 105 1.05 × 104 14.8 1.36 × 105
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 145 0.424 2710 200 0.585 3730 300 0.877 5600 400 1.17 7470 500 1.46 9330 600 1.75 1.12 × 104 700 2.05 1.31 × 104 800 2.34 1.49 × 104 900 2.63 1.68 × 104 1000 2.92 1.87 × 104 2000 5.85 3.73 × 104 3000 8.77 5.60 × 104 4000 11.7 7.47 × 104 5000 14.6 9.33 × 104 5050 14.8 9.44 × 104
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 145 0.785 3680 200 1.08 5080 300 1.63 7620 400 2.17 1.02 × 104 500 2.71 1.27 × 104 600 3.25 1.52 × 104 700 3.79 1.78 × 104 800 4.33 2.03 × 104 900 4.88 2.29 × 104 1000 5.42 2.54 × 104 2000 10.8 5.08 × 104 2730 14.8 6.93 × 104
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 145 1.34 4810 200 1.85 6640 300 2.77 9960 400 3.70 1.33 × 104 500 4.62 1.66 × 104 600 5.54 1.99 × 104 700 6.47 2.32 × 104 800 7.39 2.66 × 104 900 8.32 2.99 × 104 1000 9.24 3.32 × 104 1600 14.8 5.31 × 104
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 145 2.15 6090 200 2.96 8400 300 4.44 1.26 × 104 400 5.92 1.68 × 104 500 7.40 2.10 × 104 600 8.88 2.52 × 104 700 10.4 2.94 × 104 800 11.8 3.36 × 104 900 13.3 3.78 × 104 999 14.8 4.19 × 104
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 145 3.27 7520 200 4.51 1.04 × 104 300 6.77 1.56 × 104 400 9.02 2.07 × 104 500 11.3 2.59 × 104 600 13.5 3.11 × 104 655 14.8 3.40 × 104
 Steel I Beam: W14 × 145 (Wide Flange 14 inch tall × 145 lbf/ft) L = 125 ft (lbf/ft) (in) (psi) 145 7.99 1.17 × 104 200 11.0 1.62 × 104 268 14.8 2.17 × 104
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