Wide Flange Steel I Beam: W8 × 28

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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four 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 four equal spans, we compute the displacement at the middle of the first and fourth spans, and the maximum normal stress occuring at the second and fourth supports 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 8.27 × 10-6 13.3 30.0 8.86 × 10-6 14.3 40.0 1.18 × 10-5 19.0 50.0 1.48 × 10-5 23.8 60.0 1.77 × 10-5 28.5 70.0 2.07 × 10-5 33.3 80.0 2.36 × 10-5 38.1 90.0 2.66 × 10-5 42.8 100 2.95 × 10-5 47.6 200 5.91 × 10-5 95.1 300 8.86 × 10-5 143 400 1.18 × 10-4 190 500 1.48 × 10-4 238 600 1.77 × 10-4 285 700 2.07 × 10-4 333 800 2.36 × 10-4 381 900 2.66 × 10-4 428 1000 2.95 × 10-4 476 2000 5.91 × 10-4 951 3000 8.86 × 10-4 1430 4000 0.00118 1900 5000 0.00148 2380 6000 0.00177 2850 7000 0.00207 3330 8000 0.00236 3810 9000 0.00266 4280 1.00 × 104 0.00295 4760 2.00 × 104 0.00591 9510 3.00 × 104 0.00886 1.43 × 104 4.00 × 104 0.0118 1.90 × 104 5.00 × 104 0.0148 2.38 × 104 6.00 × 104 0.0177 2.85 × 104 7.00 × 104 0.0207 3.33 × 104 8.00 × 104 0.0236 3.81 × 104 9.00 × 104 0.0266 4.28 × 104 1.00 × 105 0.0295 4.76 × 104 2.00 × 105 0.0591 9.51 × 104 3.00 × 105 0.0886 1.43 × 105 4.00 × 105 0.118 1.90 × 105 5.00 × 105 0.148 2.38 × 105 6.00 × 105 0.177 2.85 × 105 6.24 × 105 0.184 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 6.38 × 10-5 37.0 30.0 6.84 × 10-5 39.6 40.0 9.12 × 10-5 52.9 50.0 1.14 × 10-4 66.1 60.0 1.37 × 10-4 79.3 70.0 1.60 × 10-4 92.5 80.0 1.82 × 10-4 106 90.0 2.05 × 10-4 119 100 2.28 × 10-4 132 200 4.56 × 10-4 264 300 6.84 × 10-4 396 400 9.12 × 10-4 529 500 0.00114 661 600 0.00137 793 700 0.00160 925 800 0.00182 1060 900 0.00205 1190 1000 0.00228 1320 2000 0.00456 2640 3000 0.00684 3960 4000 0.00912 5290 5000 0.0114 6610 6000 0.0137 7930 7000 0.0160 9250 8000 0.0182 1.06 × 104 9000 0.0205 1.19 × 104 1.00 × 104 0.0228 1.32 × 104 2.00 × 104 0.0456 2.64 × 104 3.00 × 104 0.0684 3.96 × 104 4.00 × 104 0.0912 5.29 × 104 5.00 × 104 0.114 6.61 × 104 6.00 × 104 0.137 7.93 × 104 7.00 × 104 0.160 9.25 × 104 8.00 × 104 0.182 1.06 × 105 9.00 × 104 0.205 1.19 × 105 1.00 × 105 0.228 1.32 × 105 2.00 × 105 0.456 2.64 × 105 2.25 × 105 0.512 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 0.00102 148 30.0 0.00109 159 40.0 0.00146 211 50.0 0.00182 264 60.0 0.00219 317 70.0 0.00255 370 80.0 0.00292 423 90.0 0.00328 476 100 0.00365 529 200 0.00729 1060 300 0.0109 1590 400 0.0146 2110 500 0.0182 2640 600 0.0219 3170 700 0.0255 3700 800 0.0292 4230 900 0.0328 4760 1000 0.0365 5290 2000 0.0729 1.06 × 104 3000 0.109 1.59 × 104 4000 0.146 2.11 × 104 5000 0.182 2.64 × 104 6000 0.219 3.17 × 104 7000 0.255 3.70 × 104 8000 0.292 4.23 × 104 9000 0.328 4.76 × 104 1.00 × 104 0.365 5.29 × 104 2.00 × 104 0.729 1.06 × 105 3.00 × 104 1.09 1.59 × 105 4.00 × 104 1.46 2.11 × 105 5.00 × 104 1.82 2.64 × 105 5.62 × 104 2.05 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 0.00517 333 30.0 0.00554 357 40.0 0.00739 476 50.0 0.00923 595 60.0 0.0111 713 70.0 0.0129 832 80.0 0.0148 951 90.0 0.0166 1070 100 0.0185 1190 200 0.0369 2380 300 0.0554 3570 400 0.0739 4760 500 0.0923 5950 600 0.111 7130 700 0.129 8320 800 0.148 9510 900 0.166 1.07 × 104 1000 0.185 1.19 × 104 2000 0.369 2.38 × 104 3000 0.554 3.57 × 104 4000 0.739 4.76 × 104 5000 0.923 5.95 × 104 6000 1.11 7.13 × 104 7000 1.29 8.32 × 104 8000 1.48 9.51 × 104 9000 1.66 1.07 × 105 1.00 × 104 1.85 1.19 × 105 2.00 × 104 3.69 2.38 × 105 2.50 × 104 4.61 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 0.0163 592 30.0 0.0175 634 40.0 0.0233 846 50.0 0.0292 1060 60.0 0.0350 1270 70.0 0.0408 1480 80.0 0.0467 1690 90.0 0.0525 1900 100 0.0584 2110 200 0.117 4230 300 0.175 6340 400 0.233 8460 500 0.292 1.06 × 104 600 0.350 1.27 × 104 700 0.408 1.48 × 104 800 0.467 1.69 × 104 900 0.525 1.90 × 104 1000 0.584 2.11 × 104 2000 1.17 4.23 × 104 3000 1.75 6.34 × 104 4000 2.33 8.46 × 104 5000 2.92 1.06 × 105 6000 3.50 1.27 × 105 7000 4.08 1.48 × 105 8000 4.67 1.69 × 105 9000 5.25 1.90 × 105 1.00 × 104 5.84 2.11 × 105 1.41 × 104 8.20 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 0.0399 925 30.0 0.0427 991 40.0 0.0570 1320 50.0 0.0712 1650 60.0 0.0855 1980 70.0 0.0997 2310 80.0 0.114 2640 90.0 0.128 2970 100 0.142 3300 200 0.285 6610 300 0.427 9910 400 0.570 1.32 × 104 500 0.712 1.65 × 104 600 0.855 1.98 × 104 700 0.997 2.31 × 104 800 1.14 2.64 × 104 900 1.28 2.97 × 104 1000 1.42 3.30 × 104 2000 2.85 6.61 × 104 3000 4.27 9.91 × 104 4000 5.70 1.32 × 105 5000 7.12 1.65 × 105 5660 8.06 1.87 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 28.0 0.0827 1330 30.0 0.0886 1430 40.0 0.118 1900 50.0 0.148 2380 60.0 0.177 2850 70.0 0.207 3330 80.0 0.236 3810 90.0 0.266 4280 100 0.295 4760 200 0.591 9510 300 0.886 1.43 × 104 400 1.18 1.90 × 104 500 1.48 2.38 × 104 600 1.77 2.85 × 104 700 2.07 3.33 × 104 800 2.36 3.81 × 104 900 2.66 4.28 × 104 1000 2.95 4.76 × 104 2000 5.91 9.51 × 104 2730 8.06 1.30 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 28.0 0.261 2370 30.0 0.280 2540 40.0 0.373 3380 50.0 0.467 4230 60.0 0.560 5070 70.0 0.654 5920 80.0 0.747 6760 90.0 0.840 7610 100 0.934 8460 200 1.87 1.69 × 104 300 2.80 2.54 × 104 400 3.73 3.38 × 104 500 4.67 4.23 × 104 600 5.60 5.07 × 104 700 6.54 5.92 × 104 800 7.47 6.76 × 104 863 8.06 7.30 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 28.0 0.638 3700 30.0 0.684 3960 40.0 0.912 5290 50.0 1.14 6610 60.0 1.37 7930 70.0 1.60 9250 80.0 1.82 1.06 × 104 90.0 2.05 1.19 × 104 100 2.28 1.32 × 104 200 4.56 2.64 × 104 300 6.84 3.96 × 104 354 8.06 4.67 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 28.0 1.32 5330 30.0 1.42 5710 40.0 1.89 7610 50.0 2.36 9510 60.0 2.84 1.14 × 104 70.0 3.31 1.33 × 104 80.0 3.78 1.52 × 104 90.0 4.25 1.71 × 104 100 4.73 1.90 × 104 171 8.06 3.24 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 28.0 2.45 7250 30.0 2.63 7770 40.0 3.50 1.04 × 104 50.0 4.38 1.29 × 104 60.0 5.25 1.55 × 104 70.0 6.13 1.81 × 104 80.0 7.01 2.07 × 104 90.0 7.88 2.33 × 104 92.0 8.06 2.38 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 28.0 4.18 9470 30.0 4.48 1.01 × 104 40.0 5.98 1.35 × 104 50.0 7.47 1.69 × 104 54.0 8.06 1.82 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 28.0 6.70 1.20 × 104 30.0 7.18 1.28 × 104 33.7 8.06 1.44 × 104