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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W6 × 15
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 = 29.1 in4) for the W6 × 15 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 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 15.0 1.23 × 10-5 20.8 20.0 1.64 × 10-5 27.8 30.0 2.47 × 10-5 41.7 40.0 3.29 × 10-5 55.6 50.0 4.11 × 10-5 69.5 60.0 4.93 × 10-5 83.4 70.0 5.76 × 10-5 97.3 80.0 6.58 × 10-5 111 90.0 7.40 × 10-5 125 100 8.22 × 10-5 139 200 1.64 × 10-4 278 300 2.47 × 10-4 417 400 3.29 × 10-4 556 500 4.11 × 10-4 695 600 4.93 × 10-4 834 700 5.76 × 10-4 973 800 6.58 × 10-4 1110 900 7.40 × 10-4 1250 1000 8.22 × 10-4 1390 2000 0.00164 2780 3000 0.00247 4170 4000 0.00329 5560 5000 0.00411 6950 6000 0.00493 8340 7000 0.00576 9730 8000 0.00658 1.11 × 104 9000 0.00740 1.25 × 104 1.00 × 104 0.00822 1.39 × 104 2.00 × 104 0.0164 2.78 × 104 3.00 × 104 0.0247 4.17 × 104 4.00 × 104 0.0329 5.56 × 104 5.00 × 104 0.0411 6.95 × 104 6.00 × 104 0.0493 8.34 × 104 7.00 × 104 0.0576 9.73 × 104 8.00 × 104 0.0658 1.11 × 105 9.00 × 104 0.0740 1.25 × 105 1.00 × 105 0.0822 1.39 × 105 2.00 × 105 0.164 2.78 × 105 2.14 × 105 0.176 2.97 × 105
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 15.0 9.52 × 10-5 57.9 20.0 1.27 × 10-4 77.2 30.0 1.90 × 10-4 116 40.0 2.54 × 10-4 154 50.0 3.17 × 10-4 193 60.0 3.81 × 10-4 232 70.0 4.44 × 10-4 270 80.0 5.08 × 10-4 309 90.0 5.71 × 10-4 347 100 6.35 × 10-4 386 200 0.00127 772 300 0.00190 1160 400 0.00254 1540 500 0.00317 1930 600 0.00381 2320 700 0.00444 2700 800 0.00508 3090 900 0.00571 3470 1000 0.00635 3860 2000 0.0127 7720 3000 0.0190 1.16 × 104 4000 0.0254 1.54 × 104 5000 0.0317 1.93 × 104 6000 0.0381 2.32 × 104 7000 0.0444 2.70 × 104 8000 0.0508 3.09 × 104 9000 0.0571 3.47 × 104 1.00 × 104 0.0635 3.86 × 104 2.00 × 104 0.127 7.72 × 104 3.00 × 104 0.190 1.16 × 105 4.00 × 104 0.254 1.54 × 105 5.00 × 104 0.317 1.93 × 105 6.00 × 104 0.381 2.32 × 105 7.00 × 104 0.444 2.70 × 105 7.70 × 104 0.488 2.97 × 105
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 15.0 0.00152 232 20.0 0.00203 309 30.0 0.00305 463 40.0 0.00406 618 50.0 0.00508 772 60.0 0.00609 926 70.0 0.00711 1080 80.0 0.00812 1240 90.0 0.00914 1390 100 0.0102 1540 200 0.0203 3090 300 0.0305 4630 400 0.0406 6180 500 0.0508 7720 600 0.0609 9260 700 0.0711 1.08 × 104 800 0.0812 1.24 × 104 900 0.0914 1.39 × 104 1000 0.102 1.54 × 104 2000 0.203 3.09 × 104 3000 0.305 4.63 × 104 4000 0.406 6.18 × 104 5000 0.508 7.72 × 104 6000 0.609 9.26 × 104 7000 0.711 1.08 × 105 8000 0.812 1.24 × 105 9000 0.914 1.39 × 105 1.00 × 104 1.02 1.54 × 105 1.92 × 104 1.95 2.97 × 105
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 15.0 0.00771 521 20.0 0.0103 695 30.0 0.0154 1040 40.0 0.0206 1390 50.0 0.0257 1740 60.0 0.0308 2080 70.0 0.0360 2430 80.0 0.0411 2780 90.0 0.0463 3130 100 0.0514 3470 200 0.103 6950 300 0.154 1.04 × 104 400 0.206 1.39 × 104 500 0.257 1.74 × 104 600 0.308 2.08 × 104 700 0.360 2.43 × 104 800 0.411 2.78 × 104 900 0.463 3.13 × 104 1000 0.514 3.47 × 104 2000 1.03 6.95 × 104 3000 1.54 1.04 × 105 4000 2.06 1.39 × 105 5000 2.57 1.74 × 105 6000 3.08 2.08 × 105 7000 3.60 2.43 × 105 8000 4.11 2.78 × 105 8550 4.40 2.97 × 105
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 15.0 0.0244 926 20.0 0.0325 1240 30.0 0.0487 1850 40.0 0.0650 2470 50.0 0.0812 3090 60.0 0.0975 3710 70.0 0.114 4320 80.0 0.130 4940 90.0 0.146 5560 100 0.162 6180 200 0.325 1.24 × 104 300 0.487 1.85 × 104 400 0.650 2.47 × 104 500 0.812 3.09 × 104 600 0.975 3.71 × 104 700 1.14 4.32 × 104 800 1.30 4.94 × 104 900 1.46 5.56 × 104 1000 1.62 6.18 × 104 2000 3.25 1.24 × 105 3000 4.87 1.85 × 105 3690 5.99 2.28 × 105
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 15.0 0.0595 1450 20.0 0.0793 1930 30.0 0.119 2890 40.0 0.159 3860 50.0 0.198 4820 60.0 0.238 5790 70.0 0.278 6750 80.0 0.317 7720 90.0 0.357 8680 100 0.397 9650 200 0.793 1.93 × 104 300 1.19 2.89 × 104 400 1.59 3.86 × 104 500 1.98 4.82 × 104 600 2.38 5.79 × 104 700 2.78 6.75 × 104 800 3.17 7.72 × 104 900 3.57 8.68 × 104 1000 3.97 9.65 × 104 1510 5.99 1.46 × 105
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 15.0 0.123 2080 20.0 0.164 2780 30.0 0.247 4170 40.0 0.329 5560 50.0 0.411 6950 60.0 0.493 8340 70.0 0.576 9730 80.0 0.658 1.11 × 104 90.0 0.740 1.25 × 104 100 0.822 1.39 × 104 200 1.64 2.78 × 104 300 2.47 4.17 × 104 400 3.29 5.56 × 104 500 4.11 6.95 × 104 600 4.93 8.34 × 104 700 5.76 9.73 × 104 728 5.99 1.01 × 105
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 15.0 0.390 3710 20.0 0.520 4940 30.0 0.780 7410 40.0 1.04 9880 50.0 1.30 1.24 × 104 60.0 1.56 1.48 × 104 70.0 1.82 1.73 × 104 80.0 2.08 1.98 × 104 90.0 2.34 2.22 × 104 100 2.60 2.47 × 104 200 5.20 4.94 × 104 230 5.99 5.69 × 104
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 15.0 0.952 5790 20.0 1.27 7720 30.0 1.90 1.16 × 104 40.0 2.54 1.54 × 104 50.0 3.17 1.93 × 104 60.0 3.81 2.32 × 104 70.0 4.44 2.70 × 104 80.0 5.08 3.09 × 104 90.0 5.71 3.47 × 104 94.4 5.99 3.64 × 104
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 15.0 1.97 8340 20.0 2.63 1.11 × 104 30.0 3.95 1.67 × 104 40.0 5.26 2.22 × 104 45.5 5.99 2.53 × 104
 Steel I Beam: W6 × 15 (Wide Flange 6 inch tall × 15 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 15.0 3.66 1.13 × 104 20.0 4.88 1.51 × 104 24.6 5.99 1.86 × 104