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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W6 × 12
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 = 22.1 in4) for the W6 × 12 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 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 12.0 1.30 × 10-5 22.1 20.0 2.17 × 10-5 36.8 30.0 3.25 × 10-5 55.3 40.0 4.33 × 10-5 73.7 50.0 5.42 × 10-5 92.1 60.0 6.50 × 10-5 111 70.0 7.58 × 10-5 129 80.0 8.66 × 10-5 147 90.0 9.75 × 10-5 166 100 1.08 × 10-4 184 200 2.17 × 10-4 368 300 3.25 × 10-4 553 400 4.33 × 10-4 737 500 5.42 × 10-4 921 600 6.50 × 10-4 1110 700 7.58 × 10-4 1290 800 8.66 × 10-4 1470 900 9.75 × 10-4 1660 1000 0.00108 1840 2000 0.00217 3680 3000 0.00325 5530 4000 0.00433 7370 5000 0.00542 9210 6000 0.00650 1.11 × 104 7000 0.00758 1.29 × 104 8000 0.00866 1.47 × 104 9000 0.00975 1.66 × 104 1.00 × 104 0.0108 1.84 × 104 2.00 × 104 0.0217 3.68 × 104 3.00 × 104 0.0325 5.53 × 104 4.00 × 104 0.0433 7.37 × 104 5.00 × 104 0.0542 9.21 × 104 6.00 × 104 0.0650 1.11 × 105 7.00 × 104 0.0758 1.29 × 105 8.00 × 104 0.0866 1.47 × 105 9.00 × 104 0.0975 1.66 × 105 1.00 × 105 0.108 1.84 × 105 1.61 × 105 0.175 2.97 × 105
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 12.0 1.00 × 10-4 61.4 20.0 1.67 × 10-4 102 30.0 2.51 × 10-4 153 40.0 3.34 × 10-4 205 50.0 4.18 × 10-4 256 60.0 5.01 × 10-4 307 70.0 5.85 × 10-4 358 80.0 6.69 × 10-4 409 90.0 7.52 × 10-4 460 100 8.36 × 10-4 512 200 0.00167 1020 300 0.00251 1530 400 0.00334 2050 500 0.00418 2560 600 0.00501 3070 700 0.00585 3580 800 0.00669 4090 900 0.00752 4600 1000 0.00836 5120 2000 0.0167 1.02 × 104 3000 0.0251 1.53 × 104 4000 0.0334 2.05 × 104 5000 0.0418 2.56 × 104 6000 0.0501 3.07 × 104 7000 0.0585 3.58 × 104 8000 0.0669 4.09 × 104 9000 0.0752 4.60 × 104 1.00 × 104 0.0836 5.12 × 104 2.00 × 104 0.167 1.02 × 105 3.00 × 104 0.251 1.53 × 105 4.00 × 104 0.334 2.05 × 105 5.00 × 104 0.418 2.56 × 105 5.81 × 104 0.485 2.97 × 105
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 12.0 0.00160 246 20.0 0.00267 409 30.0 0.00401 614 40.0 0.00535 819 50.0 0.00669 1020 60.0 0.00802 1230 70.0 0.00936 1430 80.0 0.0107 1640 90.0 0.0120 1840 100 0.0134 2050 200 0.0267 4090 300 0.0401 6140 400 0.0535 8190 500 0.0669 1.02 × 104 600 0.0802 1.23 × 104 700 0.0936 1.43 × 104 800 0.107 1.64 × 104 900 0.120 1.84 × 104 1000 0.134 2.05 × 104 2000 0.267 4.09 × 104 3000 0.401 6.14 × 104 4000 0.535 8.19 × 104 5000 0.669 1.02 × 105 6000 0.802 1.23 × 105 7000 0.936 1.43 × 105 8000 1.07 1.64 × 105 9000 1.20 1.84 × 105 1.00 × 104 1.34 2.05 × 105 1.45 × 104 1.94 2.97 × 105
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 12.0 0.00812 553 20.0 0.0135 921 30.0 0.0203 1380 40.0 0.0271 1840 50.0 0.0338 2300 60.0 0.0406 2760 70.0 0.0474 3220 80.0 0.0542 3680 90.0 0.0609 4140 100 0.0677 4600 200 0.135 9210 300 0.203 1.38 × 104 400 0.271 1.84 × 104 500 0.338 2.30 × 104 600 0.406 2.76 × 104 700 0.474 3.22 × 104 800 0.542 3.68 × 104 900 0.609 4.14 × 104 1000 0.677 4.60 × 104 2000 1.35 9.21 × 104 3000 2.03 1.38 × 105 4000 2.71 1.84 × 105 5000 3.38 2.30 × 105 6000 4.06 2.76 × 105 6450 4.37 2.97 × 105
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 12.0 0.0257 982 20.0 0.0428 1640 30.0 0.0642 2460 40.0 0.0856 3270 50.0 0.107 4090 60.0 0.128 4910 70.0 0.150 5730 80.0 0.171 6550 90.0 0.193 7370 100 0.214 8190 200 0.428 1.64 × 104 300 0.642 2.46 × 104 400 0.856 3.27 × 104 500 1.07 4.09 × 104 600 1.28 4.91 × 104 700 1.50 5.73 × 104 800 1.71 6.55 × 104 900 1.93 7.37 × 104 1000 2.14 8.19 × 104 2000 4.28 1.64 × 105 2820 6.03 2.31 × 105
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 12.0 0.0627 1530 20.0 0.104 2560 30.0 0.157 3840 40.0 0.209 5120 50.0 0.261 6390 60.0 0.313 7670 70.0 0.366 8950 80.0 0.418 1.02 × 104 90.0 0.470 1.15 × 104 100 0.522 1.28 × 104 200 1.04 2.56 × 104 300 1.57 3.84 × 104 400 2.09 5.12 × 104 500 2.61 6.39 × 104 600 3.13 7.67 × 104 700 3.66 8.95 × 104 800 4.18 1.02 × 105 900 4.70 1.15 × 105 1000 5.22 1.28 × 105 1150 6.03 1.48 × 105
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 12.0 0.130 2210 20.0 0.217 3680 30.0 0.325 5530 40.0 0.433 7370 50.0 0.542 9210 60.0 0.650 1.11 × 104 70.0 0.758 1.29 × 104 80.0 0.866 1.47 × 104 90.0 0.975 1.66 × 104 100 1.08 1.84 × 104 200 2.17 3.68 × 104 300 3.25 5.53 × 104 400 4.33 7.37 × 104 500 5.42 9.21 × 104 557 6.03 1.03 × 105
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 12.0 0.411 3930 20.0 0.685 6550 30.0 1.03 9820 40.0 1.37 1.31 × 104 50.0 1.71 1.64 × 104 60.0 2.05 1.96 × 104 70.0 2.40 2.29 × 104 80.0 2.74 2.62 × 104 90.0 3.08 2.95 × 104 100 3.42 3.27 × 104 176 6.03 5.77 × 104
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 12.0 1.00 6140 20.0 1.67 1.02 × 104 30.0 2.51 1.53 × 104 40.0 3.34 2.05 × 104 50.0 4.18 2.56 × 104 60.0 5.01 3.07 × 104 70.0 5.85 3.58 × 104 72.2 6.03 3.69 × 104
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 12.0 2.08 8840 20.0 3.47 1.47 × 104 30.0 5.20 2.21 × 104 34.8 6.03 2.56 × 104
 Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 12.0 3.85 1.20 × 104 18.8 6.03 1.88 × 104