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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W18 × 60
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 = 984 in4) for the W18 × 60 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: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 60.0 1.91 × 10-6 6.01 70.0 2.22 × 10-6 7.01 80.0 2.54 × 10-6 8.01 90.0 2.86 × 10-6 9.01 100 3.18 × 10-6 10.0 200 6.35 × 10-6 20.0 300 9.53 × 10-6 30.0 400 1.27 × 10-5 40.0 500 1.59 × 10-5 50.0 600 1.91 × 10-5 60.1 700 2.22 × 10-5 70.1 800 2.54 × 10-5 80.1 900 2.86 × 10-5 90.1 1000 3.18 × 10-5 100 2000 6.35 × 10-5 200 3000 9.53 × 10-5 300 4000 1.27 × 10-4 400 5000 1.59 × 10-4 500 6000 1.91 × 10-4 601 7000 2.22 × 10-4 701 8000 2.54 × 10-4 801 9000 2.86 × 10-4 901 1.00 × 104 3.18 × 10-4 1000 2.00 × 104 6.35 × 10-4 2000 3.00 × 104 9.53 × 10-4 3000 4.00 × 104 0.00127 4000 5.00 × 104 0.00159 5000 6.00 × 104 0.00191 6010 7.00 × 104 0.00222 7010 8.00 × 104 0.00254 8010 9.00 × 104 0.00286 9010 1.00 × 105 0.00318 1.00 × 104 2.00 × 105 0.00635 2.00 × 104 3.00 × 105 0.00953 3.00 × 104 4.00 × 105 0.0127 4.00 × 104 5.00 × 105 0.0159 5.00 × 104 6.00 × 105 0.0191 6.01 × 104 7.00 × 105 0.0222 7.01 × 104 8.00 × 105 0.0254 8.01 × 104 9.00 × 105 0.0286 9.01 × 104 1.00 × 106 0.0318 1.00 × 105 2.00 × 106 0.0635 2.00 × 105 2.97 × 106 0.0942 2.97 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 60.0 1.47 × 10-5 16.7 70.0 1.72 × 10-5 19.5 80.0 1.96 × 10-5 22.2 90.0 2.21 × 10-5 25.0 100 2.45 × 10-5 27.8 200 4.90 × 10-5 55.6 300 7.35 × 10-5 83.4 400 9.80 × 10-5 111 500 1.23 × 10-4 139 600 1.47 × 10-4 167 700 1.72 × 10-4 195 800 1.96 × 10-4 222 900 2.21 × 10-4 250 1000 2.45 × 10-4 278 2000 4.90 × 10-4 556 3000 7.35 × 10-4 834 4000 9.80 × 10-4 1110 5000 0.00123 1390 6000 0.00147 1670 7000 0.00172 1950 8000 0.00196 2220 9000 0.00221 2500 1.00 × 104 0.00245 2780 2.00 × 104 0.00490 5560 3.00 × 104 0.00735 8340 4.00 × 104 0.00980 1.11 × 104 5.00 × 104 0.0123 1.39 × 104 6.00 × 104 0.0147 1.67 × 104 7.00 × 104 0.0172 1.95 × 104 8.00 × 104 0.0196 2.22 × 104 9.00 × 104 0.0221 2.50 × 104 1.00 × 105 0.0245 2.78 × 104 2.00 × 105 0.0490 5.56 × 104 3.00 × 105 0.0735 8.34 × 104 4.00 × 105 0.0980 1.11 × 105 5.00 × 105 0.123 1.39 × 105 6.00 × 105 0.147 1.67 × 105 7.00 × 105 0.172 1.95 × 105 8.00 × 105 0.196 2.22 × 105 9.00 × 105 0.221 2.50 × 105 1.00 × 106 0.245 2.78 × 105 1.07 × 106 0.262 2.97 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 60.0 2.35 × 10-4 66.7 70.0 2.74 × 10-4 77.9 80.0 3.14 × 10-4 89.0 90.0 3.53 × 10-4 100 100 3.92 × 10-4 111 200 7.84 × 10-4 222 300 0.00118 334 400 0.00157 445 500 0.00196 556 600 0.00235 667 700 0.00274 779 800 0.00314 890 900 0.00353 1000 1000 0.00392 1110 2000 0.00784 2220 3000 0.0118 3340 4000 0.0157 4450 5000 0.0196 5560 6000 0.0235 6670 7000 0.0274 7790 8000 0.0314 8900 9000 0.0353 1.00 × 104 1.00 × 104 0.0392 1.11 × 104 2.00 × 104 0.0784 2.22 × 104 3.00 × 104 0.118 3.34 × 104 4.00 × 104 0.157 4.45 × 104 5.00 × 104 0.196 5.56 × 104 6.00 × 104 0.235 6.67 × 104 7.00 × 104 0.274 7.79 × 104 8.00 × 104 0.314 8.90 × 104 9.00 × 104 0.353 1.00 × 105 1.00 × 105 0.392 1.11 × 105 2.00 × 105 0.784 2.22 × 105 2.67 × 105 1.05 2.97 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 60.0 0.00119 150 70.0 0.00139 175 80.0 0.00159 200 90.0 0.00179 225 100 0.00198 250 200 0.00397 500 300 0.00595 751 400 0.00794 1000 500 0.00992 1250 600 0.0119 1500 700 0.0139 1750 800 0.0159 2000 900 0.0179 2250 1000 0.0198 2500 2000 0.0397 5000 3000 0.0595 7510 4000 0.0794 1.00 × 104 5000 0.0992 1.25 × 104 6000 0.119 1.50 × 104 7000 0.139 1.75 × 104 8000 0.159 2.00 × 104 9000 0.179 2.25 × 104 1.00 × 104 0.198 2.50 × 104 2.00 × 104 0.397 5.00 × 104 3.00 × 104 0.595 7.51 × 104 4.00 × 104 0.794 1.00 × 105 5.00 × 104 0.992 1.25 × 105 6.00 × 104 1.19 1.50 × 105 7.00 × 104 1.39 1.75 × 105 8.00 × 104 1.59 2.00 × 105 9.00 × 104 1.79 2.25 × 105 1.00 × 105 1.98 2.50 × 105 1.19 × 105 2.36 2.97 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 60.0 0.00376 267 70.0 0.00439 311 80.0 0.00502 356 90.0 0.00565 400 100 0.00627 445 200 0.0125 890 300 0.0188 1330 400 0.0251 1780 500 0.0314 2220 600 0.0376 2670 700 0.0439 3110 800 0.0502 3560 900 0.0565 4000 1000 0.0627 4450 2000 0.125 8900 3000 0.188 1.33 × 104 4000 0.251 1.78 × 104 5000 0.314 2.22 × 104 6000 0.376 2.67 × 104 7000 0.439 3.11 × 104 8000 0.502 3.56 × 104 9000 0.565 4.00 × 104 1.00 × 104 0.627 4.45 × 104 2.00 × 104 1.25 8.90 × 104 3.00 × 104 1.88 1.33 × 105 4.00 × 104 2.51 1.78 × 105 5.00 × 104 3.14 2.22 × 105 6.00 × 104 3.76 2.67 × 105 6.68 × 104 4.19 2.97 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 60.0 0.00919 417 70.0 0.0107 487 80.0 0.0123 556 90.0 0.0138 626 100 0.0153 695 200 0.0306 1390 300 0.0459 2090 400 0.0613 2780 500 0.0766 3480 600 0.0919 4170 700 0.107 4870 800 0.123 5560 900 0.138 6260 1000 0.153 6950 2000 0.306 1.39 × 104 3000 0.459 2.09 × 104 4000 0.613 2.78 × 104 5000 0.766 3.48 × 104 6000 0.919 4.17 × 104 7000 1.07 4.87 × 104 8000 1.23 5.56 × 104 9000 1.38 6.26 × 104 1.00 × 104 1.53 6.95 × 104 2.00 × 104 3.06 1.39 × 105 3.00 × 104 4.59 2.09 × 105 4.00 × 104 6.13 2.78 × 105 4.27 × 104 6.54 2.97 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 60.0 0.0191 601 70.0 0.0222 701 80.0 0.0254 801 90.0 0.0286 901 100 0.0318 1000 200 0.0635 2000 300 0.0953 3000 400 0.127 4000 500 0.159 5000 600 0.191 6010 700 0.222 7010 800 0.254 8010 900 0.286 9010 1000 0.318 1.00 × 104 2000 0.635 2.00 × 104 3000 0.953 3.00 × 104 4000 1.27 4.00 × 104 5000 1.59 5.00 × 104 6000 1.91 6.01 × 104 7000 2.22 7.01 × 104 8000 2.54 8.01 × 104 9000 2.86 9.01 × 104 1.00 × 104 3.18 1.00 × 105 2.00 × 104 6.35 2.00 × 105 2.97 × 104 9.42 2.97 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 60.0 0.0602 1070 70.0 0.0703 1250 80.0 0.0803 1420 90.0 0.0903 1600 100 0.100 1780 200 0.201 3560 300 0.301 5340 400 0.401 7120 500 0.502 8900 600 0.602 1.07 × 104 700 0.703 1.25 × 104 800 0.803 1.42 × 104 900 0.903 1.60 × 104 1000 1.00 1.78 × 104 2000 2.01 3.56 × 104 3000 3.01 5.34 × 104 4000 4.01 7.12 × 104 5000 5.02 8.90 × 104 6000 6.02 1.07 × 105 7000 7.03 1.25 × 105 8000 8.03 1.42 × 105 9000 9.03 1.60 × 105 1.00 × 104 10.0 1.78 × 105 1.67 × 104 16.8 2.97 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 60.0 0.147 1670 70.0 0.172 1950 80.0 0.196 2220 90.0 0.221 2500 100 0.245 2780 200 0.490 5560 300 0.735 8340 400 0.980 1.11 × 104 500 1.23 1.39 × 104 600 1.47 1.67 × 104 700 1.72 1.95 × 104 800 1.96 2.22 × 104 900 2.21 2.50 × 104 1000 2.45 2.78 × 104 2000 4.90 5.56 × 104 3000 7.35 8.34 × 104 4000 9.80 1.11 × 105 5000 12.3 1.39 × 105 6000 14.7 1.67 × 105 7000 17.2 1.95 × 105 7440 18.2 2.07 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 60.0 0.305 2400 70.0 0.356 2800 80.0 0.406 3200 90.0 0.457 3600 100 0.508 4000 200 1.02 8010 300 1.52 1.20 × 104 400 2.03 1.60 × 104 500 2.54 2.00 × 104 600 3.05 2.40 × 104 700 3.56 2.80 × 104 800 4.06 3.20 × 104 900 4.57 3.60 × 104 1000 5.08 4.00 × 104 2000 10.2 8.01 × 104 3000 15.2 1.20 × 105 3590 18.2 1.44 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 60.0 0.565 3270 70.0 0.659 3810 80.0 0.753 4360 90.0 0.847 4900 100 0.941 5450 200 1.88 1.09 × 104 300 2.82 1.63 × 104 400 3.77 2.18 × 104 500 4.71 2.72 × 104 600 5.65 3.27 × 104 700 6.59 3.81 × 104 800 7.53 4.36 × 104 900 8.47 4.90 × 104 1000 9.41 5.45 × 104 1940 18.2 1.06 × 105
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 60.0 0.964 4270 70.0 1.12 4980 80.0 1.28 5690 90.0 1.45 6410 100 1.61 7120 200 3.21 1.42 × 104 300 4.82 2.14 × 104 400 6.42 2.85 × 104 500 8.03 3.56 × 104 600 9.64 4.27 × 104 700 11.2 4.98 × 104 800 12.8 5.69 × 104 900 14.5 6.41 × 104 1000 16.1 7.12 × 104 1140 18.2 8.08 × 104
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 60.0 1.54 5410 70.0 1.80 6310 80.0 2.06 7210 90.0 2.32 8110 100 2.57 9010 200 5.14 1.80 × 104 300 7.72 2.70 × 104 400 10.3 3.60 × 104 500 12.9 4.50 × 104 600 15.4 5.41 × 104 700 18.0 6.31 × 104 709 18.2 6.39 × 104
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 60.0 2.35 6670 70.0 2.74 7790 80.0 3.14 8900 90.0 3.53 1.00 × 104 100 3.92 1.11 × 104 200 7.84 2.22 × 104 300 11.8 3.34 × 104 400 15.7 4.45 × 104 465 18.2 5.17 × 104
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 125 ft (lbf/ft) (in) (psi) 60.0 5.74 1.04 × 104 70.0 6.70 1.22 × 104 80.0 7.66 1.39 × 104 90.0 8.61 1.56 × 104 100 9.57 1.74 × 104 191 18.2 3.31 × 104
 Steel I Beam: W18 × 60 (Wide Flange 18 inch tall × 60 lbf/ft) L = 150 ft (lbf/ft) (in) (psi) 60.0 11.9 1.50 × 104 70.0 13.9 1.75 × 104 80.0 15.9 2.00 × 104 90.0 17.9 2.25 × 104 91.9 18.2 2.30 × 104
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