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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W14 × 120
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 = 1380 in4) for the W14 × 120 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 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 120 2.72 × 10-6 6.80 200 4.53 × 10-6 11.3 300 6.79 × 10-6 17.0 400 9.06 × 10-6 22.7 500 1.13 × 10-5 28.3 600 1.36 × 10-5 34.0 700 1.59 × 10-5 39.7 800 1.81 × 10-5 45.3 900 2.04 × 10-5 51.0 1000 2.26 × 10-5 56.7 2000 4.53 × 10-5 113 3000 6.79 × 10-5 170 4000 9.06 × 10-5 227 5000 1.13 × 10-4 283 6000 1.36 × 10-4 340 7000 1.59 × 10-4 397 8000 1.81 × 10-4 453 9000 2.04 × 10-4 510 1.00 × 104 2.26 × 10-4 567 2.00 × 104 4.53 × 10-4 1130 3.00 × 104 6.79 × 10-4 1700 4.00 × 104 9.06 × 10-4 2270 5.00 × 104 0.00113 2830 6.00 × 104 0.00136 3400 7.00 × 104 0.00159 3970 8.00 × 104 0.00181 4530 9.00 × 104 0.00204 5100 1.00 × 105 0.00226 5670 2.00 × 105 0.00453 1.13 × 104 3.00 × 105 0.00679 1.70 × 104 4.00 × 105 0.00906 2.27 × 104 5.00 × 105 0.0113 2.83 × 104 6.00 × 105 0.0136 3.40 × 104 7.00 × 105 0.0159 3.97 × 104 8.00 × 105 0.0181 4.53 × 104 9.00 × 105 0.0204 5.10 × 104 1.00 × 106 0.0226 5.67 × 104 2.00 × 106 0.0453 1.13 × 105 3.00 × 106 0.0679 1.70 × 105 4.00 × 106 0.0906 2.27 × 105 5.00 × 106 0.113 2.83 × 105 5.24 × 106 0.119 2.97 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 120 2.10 × 10-5 18.9 200 3.49 × 10-5 31.5 300 5.24 × 10-5 47.2 400 6.99 × 10-5 63.0 500 8.74 × 10-5 78.7 600 1.05 × 10-4 94.4 700 1.22 × 10-4 110 800 1.40 × 10-4 126 900 1.57 × 10-4 142 1000 1.75 × 10-4 157 2000 3.49 × 10-4 315 3000 5.24 × 10-4 472 4000 6.99 × 10-4 630 5000 8.74 × 10-4 787 6000 0.00105 944 7000 0.00122 1100 8000 0.00140 1260 9000 0.00157 1420 1.00 × 104 0.00175 1570 2.00 × 104 0.00349 3150 3.00 × 104 0.00524 4720 4.00 × 104 0.00699 6300 5.00 × 104 0.00874 7870 6.00 × 104 0.0105 9440 7.00 × 104 0.0122 1.10 × 104 8.00 × 104 0.0140 1.26 × 104 9.00 × 104 0.0157 1.42 × 104 1.00 × 105 0.0175 1.57 × 104 2.00 × 105 0.0349 3.15 × 104 3.00 × 105 0.0524 4.72 × 104 4.00 × 105 0.0699 6.30 × 104 5.00 × 105 0.0874 7.87 × 104 6.00 × 105 0.105 9.44 × 104 7.00 × 105 0.122 1.10 × 105 8.00 × 105 0.140 1.26 × 105 9.00 × 105 0.157 1.42 × 105 1.00 × 106 0.175 1.57 × 105 1.89 × 106 0.330 2.97 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 120 3.35 × 10-4 75.5 200 5.59 × 10-4 126 300 8.39 × 10-4 189 400 0.00112 252 500 0.00140 315 600 0.00168 378 700 0.00196 441 800 0.00224 504 900 0.00252 567 1000 0.00280 630 2000 0.00559 1260 3000 0.00839 1890 4000 0.0112 2520 5000 0.0140 3150 6000 0.0168 3780 7000 0.0196 4410 8000 0.0224 5040 9000 0.0252 5670 1.00 × 104 0.0280 6300 2.00 × 104 0.0559 1.26 × 104 3.00 × 104 0.0839 1.89 × 104 4.00 × 104 0.112 2.52 × 104 5.00 × 104 0.140 3.15 × 104 6.00 × 104 0.168 3.78 × 104 7.00 × 104 0.196 4.41 × 104 8.00 × 104 0.224 5.04 × 104 9.00 × 104 0.252 5.67 × 104 1.00 × 105 0.280 6.30 × 104 2.00 × 105 0.559 1.26 × 105 3.00 × 105 0.839 1.89 × 105 4.00 × 105 1.12 2.52 × 105 4.72 × 105 1.32 2.97 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 120 0.00170 170 200 0.00283 283 300 0.00425 425 400 0.00566 567 500 0.00708 708 600 0.00849 850 700 0.00991 992 800 0.0113 1130 900 0.0127 1270 1000 0.0142 1420 2000 0.0283 2830 3000 0.0425 4250 4000 0.0566 5670 5000 0.0708 7080 6000 0.0849 8500 7000 0.0991 9920 8000 0.113 1.13 × 104 9000 0.127 1.27 × 104 1.00 × 104 0.142 1.42 × 104 2.00 × 104 0.283 2.83 × 104 3.00 × 104 0.425 4.25 × 104 4.00 × 104 0.566 5.67 × 104 5.00 × 104 0.708 7.08 × 104 6.00 × 104 0.849 8.50 × 104 7.00 × 104 0.991 9.92 × 104 8.00 × 104 1.13 1.13 × 105 9.00 × 104 1.27 1.27 × 105 1.00 × 105 1.42 1.42 × 105 2.00 × 105 2.83 2.83 × 105 2.10 × 105 2.97 2.97 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 120 0.00537 302 200 0.00895 504 300 0.0134 755 400 0.0179 1010 500 0.0224 1260 600 0.0268 1510 700 0.0313 1760 800 0.0358 2010 900 0.0403 2270 1000 0.0447 2520 2000 0.0895 5040 3000 0.134 7550 4000 0.179 1.01 × 104 5000 0.224 1.26 × 104 6000 0.268 1.51 × 104 7000 0.313 1.76 × 104 8000 0.358 2.01 × 104 9000 0.403 2.27 × 104 1.00 × 104 0.447 2.52 × 104 2.00 × 104 0.895 5.04 × 104 3.00 × 104 1.34 7.55 × 104 4.00 × 104 1.79 1.01 × 105 5.00 × 104 2.24 1.26 × 105 6.00 × 104 2.68 1.51 × 105 7.00 × 104 3.13 1.76 × 105 8.00 × 104 3.58 2.01 × 105 9.00 × 104 4.03 2.27 × 105 1.00 × 105 4.47 2.52 × 105 1.18 × 105 5.28 2.97 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 120 0.0131 472 200 0.0218 787 300 0.0328 1180 400 0.0437 1570 500 0.0546 1970 600 0.0655 2360 700 0.0764 2750 800 0.0874 3150 900 0.0983 3540 1000 0.109 3930 2000 0.218 7870 3000 0.328 1.18 × 104 4000 0.437 1.57 × 104 5000 0.546 1.97 × 104 6000 0.655 2.36 × 104 7000 0.764 2.75 × 104 8000 0.874 3.15 × 104 9000 0.983 3.54 × 104 1.00 × 104 1.09 3.93 × 104 2.00 × 104 2.18 7.87 × 104 3.00 × 104 3.28 1.18 × 105 4.00 × 104 4.37 1.57 × 105 5.00 × 104 5.46 1.97 × 105 6.00 × 104 6.55 2.36 × 105 7.00 × 104 7.64 2.75 × 105 7.55 × 104 8.24 2.97 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 120 0.0272 680 200 0.0453 1130 300 0.0679 1700 400 0.0906 2270 500 0.113 2830 600 0.136 3400 700 0.159 3970 800 0.181 4530 900 0.204 5100 1000 0.226 5670 2000 0.453 1.13 × 104 3000 0.679 1.70 × 104 4000 0.906 2.27 × 104 5000 1.13 2.83 × 104 6000 1.36 3.40 × 104 7000 1.59 3.97 × 104 8000 1.81 4.53 × 104 9000 2.04 5.10 × 104 1.00 × 104 2.26 5.67 × 104 2.00 × 104 4.53 1.13 × 105 3.00 × 104 6.79 1.70 × 105 4.00 × 104 9.06 2.27 × 105 5.00 × 104 11.3 2.83 × 105 5.24 × 104 11.9 2.97 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 120 0.0859 1210 200 0.143 2010 300 0.215 3020 400 0.286 4030 500 0.358 5040 600 0.429 6040 700 0.501 7050 800 0.573 8060 900 0.644 9070 1000 0.716 1.01 × 104 2000 1.43 2.01 × 104 3000 2.15 3.02 × 104 4000 2.86 4.03 × 104 5000 3.58 5.04 × 104 6000 4.29 6.04 × 104 7000 5.01 7.05 × 104 8000 5.73 8.06 × 104 9000 6.44 9.07 × 104 1.00 × 104 7.16 1.01 × 105 2.00 × 104 14.3 2.01 × 105 2.95 × 104 21.1 2.97 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 120 0.210 1890 200 0.349 3150 300 0.524 4720 400 0.699 6300 500 0.874 7870 600 1.05 9440 700 1.22 1.10 × 104 800 1.40 1.26 × 104 900 1.57 1.42 × 104 1000 1.75 1.57 × 104 2000 3.49 3.15 × 104 3000 5.24 4.72 × 104 4000 6.99 6.30 × 104 5000 8.74 7.87 × 104 6000 10.5 9.44 × 104 7000 12.2 1.10 × 105 8000 14.0 1.26 × 105 8290 14.5 1.30 × 105
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 120 0.435 2720 200 0.725 4530 300 1.09 6800 400 1.45 9070 500 1.81 1.13 × 104 600 2.17 1.36 × 104 700 2.54 1.59 × 104 800 2.90 1.81 × 104 900 3.26 2.04 × 104 1000 3.62 2.27 × 104 2000 7.25 4.53 × 104 3000 10.9 6.80 × 104 4000 14.5 9.06 × 104
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 120 0.805 3700 200 1.34 6170 300 2.01 9250 400 2.68 1.23 × 104 500 3.36 1.54 × 104 600 4.03 1.85 × 104 700 4.70 2.16 × 104 800 5.37 2.47 × 104 900 6.04 2.78 × 104 1000 6.71 3.08 × 104 2000 13.4 6.17 × 104 2160 14.5 6.65 × 104
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 120 1.37 4840 200 2.29 8060 300 3.44 1.21 × 104 400 4.58 1.61 × 104 500 5.73 2.01 × 104 600 6.87 2.42 × 104 700 8.02 2.82 × 104 800 9.16 3.22 × 104 900 10.3 3.63 × 104 1000 11.5 4.03 × 104 1260 14.5 5.10 × 104
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 120 2.20 6120 200 3.67 1.02 × 104 300 5.50 1.53 × 104 400 7.34 2.04 × 104 500 9.17 2.55 × 104 600 11.0 3.06 × 104 700 12.8 3.57 × 104 789 14.5 4.03 × 104
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 120 3.35 7550 200 5.59 1.26 × 104 300 8.39 1.89 × 104 400 11.2 2.52 × 104 500 14.0 3.15 × 104 518 14.5 3.26 × 104
 Steel I Beam: W14 × 120 (Wide Flange 14 inch tall × 120 lbf/ft) L = 125 ft (lbf/ft) (in) (psi) 120 8.19 1.18 × 104 200 13.7 1.97 × 104 212 14.5 2.09 × 104
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