Wide Flange Steel I Beam: W8 × 40

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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » Wide Flange Steel I Beam » W8 × 40

For a simply supported beam in a single span, the maximum displacement and the maximum normal stress occur at the center of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 146 in4) for the W8 × 40 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 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 40.0 1.64 × 10-5 15.3 50.0 2.05 × 10-5 19.1 60.0 2.46 × 10-5 22.9 70.0 2.87 × 10-5 26.7 80.0 3.28 × 10-5 30.5 90.0 3.69 × 10-5 34.3 100 4.10 × 10-5 38.1 200 8.20 × 10-5 76.3 300 1.23 × 10-4 114 400 1.64 × 10-4 153 500 2.05 × 10-4 191 600 2.46 × 10-4 229 700 2.87 × 10-4 267 800 3.28 × 10-4 305 900 3.69 × 10-4 343 1000 4.10 × 10-4 381 2000 8.20 × 10-4 763 3000 0.00123 1140 4000 0.00164 1530 5000 0.00205 1910 6000 0.00246 2290 7000 0.00287 2670 8000 0.00328 3050 9000 0.00369 3430 1.00 × 104 0.00410 3810 2.00 × 104 0.00820 7630 3.00 × 104 0.0123 1.14 × 104 4.00 × 104 0.0164 1.53 × 104 5.00 × 104 0.0205 1.91 × 104 6.00 × 104 0.0246 2.29 × 104 7.00 × 104 0.0287 2.67 × 104 8.00 × 104 0.0328 3.05 × 104 9.00 × 104 0.0369 3.43 × 104 1.00 × 105 0.0410 3.81 × 104 2.00 × 105 0.0820 7.63 × 104 3.00 × 105 0.123 1.14 × 105 4.00 × 105 0.164 1.53 × 105 5.00 × 105 0.205 1.91 × 105 6.00 × 105 0.246 2.29 × 105 7.00 × 105 0.287 2.67 × 105 7.79 × 105 0.319 2.97 × 105
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 40.0 1.26 × 10-4 42.4 50.0 1.58 × 10-4 53.0 60.0 1.90 × 10-4 63.6 70.0 2.21 × 10-4 74.2 80.0 2.53 × 10-4 84.8 90.0 2.85 × 10-4 95.4 100 3.16 × 10-4 106 200 6.32 × 10-4 212 300 9.49 × 10-4 318 400 0.00126 424 500 0.00158 530 600 0.00190 636 700 0.00221 742 800 0.00253 848 900 0.00285 954 1000 0.00316 1060 2000 0.00632 2120 3000 0.00949 3180 4000 0.0126 4240 5000 0.0158 5300 6000 0.0190 6360 7000 0.0221 7420 8000 0.0253 8480 9000 0.0285 9540 1.00 × 104 0.0316 1.06 × 104 2.00 × 104 0.0632 2.12 × 104 3.00 × 104 0.0949 3.18 × 104 4.00 × 104 0.126 4.24 × 104 5.00 × 104 0.158 5.30 × 104 6.00 × 104 0.190 6.36 × 104 7.00 × 104 0.221 7.42 × 104 8.00 × 104 0.253 8.48 × 104 9.00 × 104 0.285 9.54 × 104 1.00 × 105 0.316 1.06 × 105 2.00 × 105 0.632 2.12 × 105 2.80 × 105 0.887 2.97 × 105
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 40.0 0.00202 170 50.0 0.00253 212 60.0 0.00304 254 70.0 0.00354 297 80.0 0.00405 339 90.0 0.00455 381 100 0.00506 424 200 0.0101 848 300 0.0152 1270 400 0.0202 1700 500 0.0253 2120 600 0.0304 2540 700 0.0354 2970 800 0.0405 3390 900 0.0455 3810 1000 0.0506 4240 2000 0.101 8480 3000 0.152 1.27 × 104 4000 0.202 1.70 × 104 5000 0.253 2.12 × 104 6000 0.304 2.54 × 104 7000 0.354 2.97 × 104 8000 0.405 3.39 × 104 9000 0.455 3.81 × 104 1.00 × 104 0.506 4.24 × 104 2.00 × 104 1.01 8.48 × 104 3.00 × 104 1.52 1.27 × 105 4.00 × 104 2.02 1.70 × 105 5.00 × 104 2.53 2.12 × 105 6.00 × 104 3.04 2.54 × 105 7.00 × 104 3.54 2.97 × 105 7.01 × 104 3.55 2.97 × 105
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 40.0 0.0102 381 50.0 0.0128 477 60.0 0.0154 572 70.0 0.0179 667 80.0 0.0205 763 90.0 0.0231 858 100 0.0256 954 200 0.0512 1910 300 0.0768 2860 400 0.102 3810 500 0.128 4770 600 0.154 5720 700 0.179 6670 800 0.205 7630 900 0.231 8580 1000 0.256 9540 2000 0.512 1.91 × 104 3000 0.768 2.86 × 104 4000 1.02 3.81 × 104 5000 1.28 4.77 × 104 6000 1.54 5.72 × 104 7000 1.79 6.67 × 104 8000 2.05 7.63 × 104 9000 2.31 8.58 × 104 1.00 × 104 2.56 9.54 × 104 2.00 × 104 5.12 1.91 × 105 3.00 × 104 7.68 2.86 × 105 3.12 × 104 7.98 2.97 × 105
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 40.0 0.0324 678 50.0 0.0405 848 60.0 0.0486 1020 70.0 0.0567 1190 80.0 0.0648 1360 90.0 0.0729 1530 100 0.0810 1700 200 0.162 3390 300 0.243 5090 400 0.324 6780 500 0.405 8480 600 0.486 1.02 × 104 700 0.567 1.19 × 104 800 0.648 1.36 × 104 900 0.729 1.53 × 104 1000 0.810 1.70 × 104 2000 1.62 3.39 × 104 3000 2.43 5.09 × 104 4000 3.24 6.78 × 104 5000 4.05 8.48 × 104 6000 4.86 1.02 × 105 7000 5.67 1.19 × 105 8000 6.48 1.36 × 105 9000 7.29 1.53 × 105 1.00 × 104 8.10 1.70 × 105 1.75 × 104 14.2 2.97 × 105
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 40.0 0.0791 1060 50.0 0.0988 1320 60.0 0.119 1590 70.0 0.138 1850 80.0 0.158 2120 90.0 0.178 2380 100 0.198 2650 200 0.395 5300 300 0.593 7950 400 0.791 1.06 × 104 500 0.988 1.32 × 104 600 1.19 1.59 × 104 700 1.38 1.85 × 104 800 1.58 2.12 × 104 900 1.78 2.38 × 104 1000 1.98 2.65 × 104 2000 3.95 5.30 × 104 3000 5.93 7.95 × 104 4000 7.91 1.06 × 105 4170 8.25 1.11 × 105
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 40.0 0.164 1530 50.0 0.205 1910 60.0 0.246 2290 70.0 0.287 2670 80.0 0.328 3050 90.0 0.369 3430 100 0.410 3810 200 0.820 7630 300 1.23 1.14 × 104 400 1.64 1.53 × 104 500 2.05 1.91 × 104 600 2.46 2.29 × 104 700 2.87 2.67 × 104 800 3.28 3.05 × 104 900 3.69 3.43 × 104 1000 4.10 3.81 × 104 2000 8.20 7.63 × 104 2010 8.25 7.68 × 104
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 40.0 0.518 2710 50.0 0.648 3390 60.0 0.777 4070 70.0 0.907 4750 80.0 1.04 5420 90.0 1.17 6100 100 1.30 6780 200 2.59 1.36 × 104 300 3.89 2.03 × 104 400 5.18 2.71 × 104 500 6.48 3.39 × 104 600 7.77 4.07 × 104 637 8.25 4.32 × 104
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 40.0 1.26 4240 50.0 1.58 5300 60.0 1.90 6360 70.0 2.21 7420 80.0 2.53 8480 90.0 2.85 9540 100 3.16 1.06 × 104 200 6.32 2.12 × 104 261 8.25 2.76 × 104
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 40.0 2.62 6100 50.0 3.28 7630 60.0 3.93 9150 70.0 4.59 1.07 × 104 80.0 5.25 1.22 × 104 90.0 5.90 1.37 × 104 100 6.56 1.53 × 104 126 8.25 1.92 × 104
 Steel I Beam: W8 × 40 (Wide Flange 8 inch tall × 40 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 40.0 4.86 8310 50.0 6.07 1.04 × 104 60.0 7.29 1.25 × 104 67.9 8.25 1.41 × 104