Wide Flange Steel I Beam: W6 × 20

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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W6 × 20
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 = 41.4 in4) for the W6 × 20 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: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 20.0 1.16 × 10-5 20.2 30.0 1.73 × 10-5 30.3 40.0 2.31 × 10-5 40.4 50.0 2.89 × 10-5 50.5 60.0 3.47 × 10-5 60.7 70.0 4.05 × 10-5 70.8 80.0 4.63 × 10-5 80.9 90.0 5.20 × 10-5 91.0 100 5.78 × 10-5 101 200 1.16 × 10-4 202 300 1.73 × 10-4 303 400 2.31 × 10-4 404 500 2.89 × 10-4 505 600 3.47 × 10-4 607 700 4.05 × 10-4 708 800 4.63 × 10-4 809 900 5.20 × 10-4 910 1000 5.78 × 10-4 1010 2000 0.00116 2020 3000 0.00173 3030 4000 0.00231 4040 5000 0.00289 5050 6000 0.00347 6070 7000 0.00405 7080 8000 0.00463 8090 9000 0.00520 9100 1.00 × 104 0.00578 1.01 × 104 2.00 × 104 0.0116 2.02 × 104 3.00 × 104 0.0173 3.03 × 104 4.00 × 104 0.0231 4.04 × 104 5.00 × 104 0.0289 5.05 × 104 6.00 × 104 0.0347 6.07 × 104 7.00 × 104 0.0405 7.08 × 104 8.00 × 104 0.0463 8.09 × 104 9.00 × 104 0.0520 9.10 × 104 1.00 × 105 0.0578 1.01 × 105 2.00 × 105 0.116 2.02 × 105 2.94 × 105 0.170 2.97 × 105
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 20.0 8.92 × 10-5 56.2 30.0 1.34 × 10-4 84.2 40.0 1.78 × 10-4 112 50.0 2.23 × 10-4 140 60.0 2.68 × 10-4 168 70.0 3.12 × 10-4 197 80.0 3.57 × 10-4 225 90.0 4.01 × 10-4 253 100 4.46 × 10-4 281 200 8.92 × 10-4 562 300 0.00134 842 400 0.00178 1120 500 0.00223 1400 600 0.00268 1680 700 0.00312 1970 800 0.00357 2250 900 0.00401 2530 1000 0.00446 2810 2000 0.00892 5620 3000 0.0134 8420 4000 0.0178 1.12 × 104 5000 0.0223 1.40 × 104 6000 0.0268 1.68 × 104 7000 0.0312 1.97 × 104 8000 0.0357 2.25 × 104 9000 0.0401 2.53 × 104 1.00 × 104 0.0446 2.81 × 104 2.00 × 104 0.0892 5.62 × 104 3.00 × 104 0.134 8.42 × 104 4.00 × 104 0.178 1.12 × 105 5.00 × 104 0.223 1.40 × 105 6.00 × 104 0.268 1.68 × 105 7.00 × 104 0.312 1.97 × 105 8.00 × 104 0.357 2.25 × 105 9.00 × 104 0.401 2.53 × 105 1.00 × 105 0.446 2.81 × 105 1.06 × 105 0.472 2.97 × 105
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 20.0 0.00143 225 30.0 0.00214 337 40.0 0.00285 449 50.0 0.00357 562 60.0 0.00428 674 70.0 0.00500 786 80.0 0.00571 899 90.0 0.00642 1010 100 0.00714 1120 200 0.0143 2250 300 0.0214 3370 400 0.0285 4490 500 0.0357 5620 600 0.0428 6740 700 0.0500 7860 800 0.0571 8990 900 0.0642 1.01 × 104 1000 0.0714 1.12 × 104 2000 0.143 2.25 × 104 3000 0.214 3.37 × 104 4000 0.285 4.49 × 104 5000 0.357 5.62 × 104 6000 0.428 6.74 × 104 7000 0.500 7.86 × 104 8000 0.571 8.99 × 104 9000 0.642 1.01 × 105 1.00 × 104 0.714 1.12 × 105 2.00 × 104 1.43 2.25 × 105 2.64 × 104 1.89 2.97 × 105
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 20.0 0.00723 505 30.0 0.0108 758 40.0 0.0145 1010 50.0 0.0181 1260 60.0 0.0217 1520 70.0 0.0253 1770 80.0 0.0289 2020 90.0 0.0325 2270 100 0.0361 2530 200 0.0723 5050 300 0.108 7580 400 0.145 1.01 × 104 500 0.181 1.26 × 104 600 0.217 1.52 × 104 700 0.253 1.77 × 104 800 0.289 2.02 × 104 900 0.325 2.27 × 104 1000 0.361 2.53 × 104 2000 0.723 5.05 × 104 3000 1.08 7.58 × 104 4000 1.45 1.01 × 105 5000 1.81 1.26 × 105 6000 2.17 1.52 × 105 7000 2.53 1.77 × 105 8000 2.89 2.02 × 105 9000 3.25 2.27 × 105 1.00 × 104 3.61 2.53 × 105 1.18 × 104 4.25 2.97 × 105
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 20.0 0.0228 899 30.0 0.0343 1350 40.0 0.0457 1800 50.0 0.0571 2250 60.0 0.0685 2700 70.0 0.0799 3140 80.0 0.0914 3590 90.0 0.103 4040 100 0.114 4490 200 0.228 8990 300 0.343 1.35 × 104 400 0.457 1.80 × 104 500 0.571 2.25 × 104 600 0.685 2.70 × 104 700 0.799 3.14 × 104 800 0.914 3.59 × 104 900 1.03 4.04 × 104 1000 1.14 4.49 × 104 2000 2.28 8.99 × 104 3000 3.43 1.35 × 105 4000 4.57 1.80 × 105 5000 5.71 2.25 × 105 5430 6.20 2.44 × 105
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 20.0 0.0558 1400 30.0 0.0836 2110 40.0 0.112 2810 50.0 0.139 3510 60.0 0.167 4210 70.0 0.195 4910 80.0 0.223 5620 90.0 0.251 6320 100 0.279 7020 200 0.558 1.40 × 104 300 0.836 2.11 × 104 400 1.12 2.81 × 104 500 1.39 3.51 × 104 600 1.67 4.21 × 104 700 1.95 4.91 × 104 800 2.23 5.62 × 104 900 2.51 6.32 × 104 1000 2.79 7.02 × 104 2000 5.58 1.40 × 105 2220 6.20 1.56 × 105
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 20.0 0.116 2020 30.0 0.173 3030 40.0 0.231 4040 50.0 0.289 5050 60.0 0.347 6070 70.0 0.405 7080 80.0 0.463 8090 90.0 0.520 9100 100 0.578 1.01 × 104 200 1.16 2.02 × 104 300 1.73 3.03 × 104 400 2.31 4.04 × 104 500 2.89 5.05 × 104 600 3.47 6.07 × 104 700 4.05 7.08 × 104 800 4.63 8.09 × 104 900 5.20 9.10 × 104 1000 5.78 1.01 × 105 1070 6.20 1.08 × 105
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 20.0 0.365 3590 30.0 0.548 5390 40.0 0.731 7190 50.0 0.914 8990 60.0 1.10 1.08 × 104 70.0 1.28 1.26 × 104 80.0 1.46 1.44 × 104 90.0 1.64 1.62 × 104 100 1.83 1.80 × 104 200 3.65 3.59 × 104 300 5.48 5.39 × 104 339 6.20 6.10 × 104
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 20.0 0.892 5620 30.0 1.34 8420 40.0 1.78 1.12 × 104 50.0 2.23 1.40 × 104 60.0 2.68 1.68 × 104 70.0 3.12 1.97 × 104 80.0 3.57 2.25 × 104 90.0 4.01 2.53 × 104 100 4.46 2.81 × 104 139 6.20 3.90 × 104
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 20.0 1.85 8090 30.0 2.78 1.21 × 104 40.0 3.70 1.62 × 104 50.0 4.63 2.02 × 104 60.0 5.55 2.43 × 104 67.0 6.20 2.71 × 104
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 20.0 3.43 1.10 × 104 30.0 5.14 1.65 × 104 36.2 6.20 1.99 × 104
 Steel I Beam: W6 × 20 (Wide Flange 6 inch tall × 20 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 20.0 5.85 1.44 × 104 21.2 6.20 1.52 × 104