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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W8 × 28
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 = 98.0 in4) for the W8 × 28 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: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 28.0 6.84 × 10-6 15.5 30.0 7.33 × 10-6 16.7 40.0 9.77 × 10-6 22.2 50.0 1.22 × 10-5 27.8 60.0 1.47 × 10-5 33.3 70.0 1.71 × 10-5 38.9 80.0 1.95 × 10-5 44.4 90.0 2.20 × 10-5 50.0 100 2.44 × 10-5 55.5 200 4.88 × 10-5 111 300 7.33 × 10-5 167 400 9.77 × 10-5 222 500 1.22 × 10-4 278 600 1.47 × 10-4 333 700 1.71 × 10-4 389 800 1.95 × 10-4 444 900 2.20 × 10-4 500 1000 2.44 × 10-4 555 2000 4.88 × 10-4 1110 3000 7.33 × 10-4 1670 4000 9.77 × 10-4 2220 5000 0.00122 2780 6000 0.00147 3330 7000 0.00171 3890 8000 0.00195 4440 9000 0.00220 5000 1.00 × 104 0.00244 5550 2.00 × 104 0.00488 1.11 × 104 3.00 × 104 0.00733 1.67 × 104 4.00 × 104 0.00977 2.22 × 104 5.00 × 104 0.0122 2.78 × 104 6.00 × 104 0.0147 3.33 × 104 7.00 × 104 0.0171 3.89 × 104 8.00 × 104 0.0195 4.44 × 104 9.00 × 104 0.0220 5.00 × 104 1.00 × 105 0.0244 5.55 × 104 2.00 × 105 0.0488 1.11 × 105 3.00 × 105 0.0733 1.67 × 105 4.00 × 105 0.0977 2.22 × 105 5.00 × 105 0.122 2.78 × 105 5.35 × 105 0.131 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 28.0 5.28 × 10-5 43.2 30.0 5.65 × 10-5 46.3 40.0 7.54 × 10-5 61.7 50.0 9.42 × 10-5 77.1 60.0 1.13 × 10-4 92.5 70.0 1.32 × 10-4 108 80.0 1.51 × 10-4 123 90.0 1.70 × 10-4 139 100 1.88 × 10-4 154 200 3.77 × 10-4 308 300 5.65 × 10-4 463 400 7.54 × 10-4 617 500 9.42 × 10-4 771 600 0.00113 925 700 0.00132 1080 800 0.00151 1230 900 0.00170 1390 1000 0.00188 1540 2000 0.00377 3080 3000 0.00565 4630 4000 0.00754 6170 5000 0.00942 7710 6000 0.0113 9250 7000 0.0132 1.08 × 104 8000 0.0151 1.23 × 104 9000 0.0170 1.39 × 104 1.00 × 104 0.0188 1.54 × 104 2.00 × 104 0.0377 3.08 × 104 3.00 × 104 0.0565 4.63 × 104 4.00 × 104 0.0754 6.17 × 104 5.00 × 104 0.0942 7.71 × 104 6.00 × 104 0.113 9.25 × 104 7.00 × 104 0.132 1.08 × 105 8.00 × 104 0.151 1.23 × 105 9.00 × 104 0.170 1.39 × 105 1.00 × 105 0.188 1.54 × 105 1.93 × 105 0.363 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 28.0 8.44 × 10-4 173 30.0 9.05 × 10-4 185 40.0 0.00121 247 50.0 0.00151 308 60.0 0.00181 370 70.0 0.00211 432 80.0 0.00241 493 90.0 0.00271 555 100 0.00302 617 200 0.00603 1230 300 0.00905 1850 400 0.0121 2470 500 0.0151 3080 600 0.0181 3700 700 0.0211 4320 800 0.0241 4930 900 0.0271 5550 1000 0.0302 6170 2000 0.0603 1.23 × 104 3000 0.0905 1.85 × 104 4000 0.121 2.47 × 104 5000 0.151 3.08 × 104 6000 0.181 3.70 × 104 7000 0.211 4.32 × 104 8000 0.241 4.93 × 104 9000 0.271 5.55 × 104 1.00 × 104 0.302 6.17 × 104 2.00 × 104 0.603 1.23 × 105 3.00 × 104 0.905 1.85 × 105 4.00 × 104 1.21 2.47 × 105 4.82 × 104 1.45 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 28.0 0.00427 389 30.0 0.00458 416 40.0 0.00611 555 50.0 0.00763 694 60.0 0.00916 833 70.0 0.0107 972 80.0 0.0122 1110 90.0 0.0137 1250 100 0.0153 1390 200 0.0305 2780 300 0.0458 4160 400 0.0611 5550 500 0.0763 6940 600 0.0916 8330 700 0.107 9720 800 0.122 1.11 × 104 900 0.137 1.25 × 104 1000 0.153 1.39 × 104 2000 0.305 2.78 × 104 3000 0.458 4.16 × 104 4000 0.611 5.55 × 104 5000 0.763 6.94 × 104 6000 0.916 8.33 × 104 7000 1.07 9.72 × 104 8000 1.22 1.11 × 105 9000 1.37 1.25 × 105 1.00 × 104 1.53 1.39 × 105 2.00 × 104 3.05 2.78 × 105 2.14 × 104 3.27 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 28.0 0.0135 691 30.0 0.0145 740 40.0 0.0193 987 50.0 0.0241 1230 60.0 0.0289 1480 70.0 0.0338 1730 80.0 0.0386 1970 90.0 0.0434 2220 100 0.0482 2470 200 0.0965 4930 300 0.145 7400 400 0.193 9870 500 0.241 1.23 × 104 600 0.289 1.48 × 104 700 0.338 1.73 × 104 800 0.386 1.97 × 104 900 0.434 2.22 × 104 1000 0.482 2.47 × 104 2000 0.965 4.93 × 104 3000 1.45 7.40 × 104 4000 1.93 9.87 × 104 5000 2.41 1.23 × 105 6000 2.89 1.48 × 105 7000 3.38 1.73 × 105 8000 3.86 1.97 × 105 9000 4.34 2.22 × 105 1.00 × 104 4.82 2.47 × 105 1.20 × 104 5.81 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 28.0 0.0330 1080 30.0 0.0353 1160 40.0 0.0471 1540 50.0 0.0589 1930 60.0 0.0707 2310 70.0 0.0824 2700 80.0 0.0942 3080 90.0 0.106 3470 100 0.118 3860 200 0.236 7710 300 0.353 1.16 × 104 400 0.471 1.54 × 104 500 0.589 1.93 × 104 600 0.707 2.31 × 104 700 0.824 2.70 × 104 800 0.942 3.08 × 104 900 1.06 3.47 × 104 1000 1.18 3.86 × 104 2000 2.36 7.71 × 104 3000 3.53 1.16 × 105 4000 4.71 1.54 × 105 5000 5.89 1.93 × 105 6000 7.07 2.31 × 105 6840 8.06 2.64 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 28.0 0.0684 1550 30.0 0.0733 1670 40.0 0.0977 2220 50.0 0.122 2780 60.0 0.147 3330 70.0 0.171 3890 80.0 0.195 4440 90.0 0.220 5000 100 0.244 5550 200 0.488 1.11 × 104 300 0.733 1.67 × 104 400 0.977 2.22 × 104 500 1.22 2.78 × 104 600 1.47 3.33 × 104 700 1.71 3.89 × 104 800 1.95 4.44 × 104 900 2.20 5.00 × 104 1000 2.44 5.55 × 104 2000 4.88 1.11 × 105 3000 7.33 1.67 × 105 3300 8.06 1.83 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 28.0 0.216 2760 30.0 0.232 2960 40.0 0.309 3950 50.0 0.386 4930 60.0 0.463 5920 70.0 0.540 6910 80.0 0.618 7900 90.0 0.695 8880 100 0.772 9870 200 1.54 1.97 × 104 300 2.32 2.96 × 104 400 3.09 3.95 × 104 500 3.86 4.93 × 104 600 4.63 5.92 × 104 700 5.40 6.91 × 104 800 6.18 7.90 × 104 900 6.95 8.88 × 104 1000 7.72 9.87 × 104 1040 8.06 1.03 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 28.0 0.528 4320 30.0 0.565 4630 40.0 0.754 6170 50.0 0.942 7710 60.0 1.13 9250 70.0 1.32 1.08 × 104 80.0 1.51 1.23 × 104 90.0 1.70 1.39 × 104 100 1.88 1.54 × 104 200 3.77 3.08 × 104 300 5.65 4.63 × 104 400 7.54 6.17 × 104 428 8.06 6.60 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 28.0 1.09 6220 30.0 1.17 6660 40.0 1.56 8880 50.0 1.95 1.11 × 104 60.0 2.34 1.33 × 104 70.0 2.74 1.55 × 104 80.0 3.13 1.78 × 104 90.0 3.52 2.00 × 104 100 3.91 2.22 × 104 200 7.82 4.44 × 104 206 8.06 4.58 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 28.0 2.03 8460 30.0 2.17 9070 40.0 2.90 1.21 × 104 50.0 3.62 1.51 × 104 60.0 4.34 1.81 × 104 70.0 5.07 2.12 × 104 80.0 5.79 2.42 × 104 90.0 6.52 2.72 × 104 100 7.24 3.02 × 104 111 8.06 3.37 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 28.0 3.46 1.11 × 104 30.0 3.71 1.18 × 104 40.0 4.94 1.58 × 104 50.0 6.18 1.97 × 104 60.0 7.41 2.37 × 104 65.3 8.06 2.58 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 28.0 5.54 1.40 × 104 30.0 5.93 1.50 × 104 40.0 7.91 2.00 × 104 40.7 8.06 2.04 × 104