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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W8 × 35
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in three equal spans, we compute the displacement at the middle of the first and the third spans, and the maximum normal stress occuring at the second and third supports of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 127 in4) for the W8 × 35 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 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 35.0 8.61 × 10-6 12.1 40.0 9.84 × 10-6 13.8 50.0 1.23 × 10-5 17.3 60.0 1.48 × 10-5 20.7 70.0 1.72 × 10-5 24.2 80.0 1.97 × 10-5 27.6 90.0 2.21 × 10-5 31.1 100 2.46 × 10-5 34.5 200 4.92 × 10-5 69.1 300 7.38 × 10-5 104 400 9.84 × 10-5 138 500 1.23 × 10-4 173 600 1.48 × 10-4 207 700 1.72 × 10-4 242 800 1.97 × 10-4 276 900 2.21 × 10-4 311 1000 2.46 × 10-4 345 2000 4.92 × 10-4 691 3000 7.38 × 10-4 1040 4000 9.84 × 10-4 1380 5000 0.00123 1730 6000 0.00148 2070 7000 0.00172 2420 8000 0.00197 2760 9000 0.00221 3110 1.00 × 104 0.00246 3450 2.00 × 104 0.00492 6910 3.00 × 104 0.00738 1.04 × 104 4.00 × 104 0.00984 1.38 × 104 5.00 × 104 0.0123 1.73 × 104 6.00 × 104 0.0148 2.07 × 104 7.00 × 104 0.0172 2.42 × 104 8.00 × 104 0.0197 2.76 × 104 9.00 × 104 0.0221 3.11 × 104 1.00 × 105 0.0246 3.45 × 104 2.00 × 105 0.0492 6.91 × 104 3.00 × 105 0.0738 1.04 × 105 4.00 × 105 0.0984 1.38 × 105 5.00 × 105 0.123 1.73 × 105 6.00 × 105 0.148 2.07 × 105 7.00 × 105 0.172 2.42 × 105 8.00 × 105 0.197 2.76 × 105 8.60 × 105 0.212 2.97 × 105
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 35.0 6.65 × 10-5 33.6 40.0 7.59 × 10-5 38.4 50.0 9.49 × 10-5 48.0 60.0 1.14 × 10-4 57.5 70.0 1.33 × 10-4 67.1 80.0 1.52 × 10-4 76.7 90.0 1.71 × 10-4 86.3 100 1.90 × 10-4 95.9 200 3.80 × 10-4 192 300 5.70 × 10-4 288 400 7.59 × 10-4 384 500 9.49 × 10-4 480 600 0.00114 575 700 0.00133 671 800 0.00152 767 900 0.00171 863 1000 0.00190 959 2000 0.00380 1920 3000 0.00570 2880 4000 0.00759 3840 5000 0.00949 4800 6000 0.0114 5750 7000 0.0133 6710 8000 0.0152 7670 9000 0.0171 8630 1.00 × 104 0.0190 9590 2.00 × 104 0.0380 1.92 × 104 3.00 × 104 0.0570 2.88 × 104 4.00 × 104 0.0759 3.84 × 104 5.00 × 104 0.0949 4.80 × 104 6.00 × 104 0.114 5.75 × 104 7.00 × 104 0.133 6.71 × 104 8.00 × 104 0.152 7.67 × 104 9.00 × 104 0.171 8.63 × 104 1.00 × 105 0.190 9.59 × 104 2.00 × 105 0.380 1.92 × 105 3.00 × 105 0.570 2.88 × 105 3.10 × 105 0.588 2.97 × 105
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 35.0 0.00106 134 40.0 0.00122 153 50.0 0.00152 192 60.0 0.00182 230 70.0 0.00213 269 80.0 0.00243 307 90.0 0.00273 345 100 0.00304 384 200 0.00608 767 300 0.00911 1150 400 0.0122 1530 500 0.0152 1920 600 0.0182 2300 700 0.0213 2690 800 0.0243 3070 900 0.0273 3450 1000 0.0304 3840 2000 0.0608 7670 3000 0.0911 1.15 × 104 4000 0.122 1.53 × 104 5000 0.152 1.92 × 104 6000 0.182 2.30 × 104 7000 0.213 2.69 × 104 8000 0.243 3.07 × 104 9000 0.273 3.45 × 104 1.00 × 104 0.304 3.84 × 104 2.00 × 104 0.608 7.67 × 104 3.00 × 104 0.911 1.15 × 105 4.00 × 104 1.22 1.53 × 105 5.00 × 104 1.52 1.92 × 105 6.00 × 104 1.82 2.30 × 105 7.00 × 104 2.13 2.69 × 105 7.74 × 104 2.35 2.97 × 105
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 35.0 0.00538 302 40.0 0.00615 345 50.0 0.00769 432 60.0 0.00923 518 70.0 0.0108 604 80.0 0.0123 691 90.0 0.0138 777 100 0.0154 863 200 0.0308 1730 300 0.0461 2590 400 0.0615 3450 500 0.0769 4320 600 0.0923 5180 700 0.108 6040 800 0.123 6910 900 0.138 7770 1000 0.154 8630 2000 0.308 1.73 × 104 3000 0.461 2.59 × 104 4000 0.615 3.45 × 104 5000 0.769 4.32 × 104 6000 0.923 5.18 × 104 7000 1.08 6.04 × 104 8000 1.23 6.91 × 104 9000 1.38 7.77 × 104 1.00 × 104 1.54 8.63 × 104 2.00 × 104 3.08 1.73 × 105 3.00 × 104 4.61 2.59 × 105 3.44 × 104 5.29 2.97 × 105
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 35.0 0.0170 537 40.0 0.0194 614 50.0 0.0243 767 60.0 0.0292 921 70.0 0.0340 1070 80.0 0.0389 1230 90.0 0.0437 1380 100 0.0486 1530 200 0.0972 3070 300 0.146 4600 400 0.194 6140 500 0.243 7670 600 0.292 9210 700 0.340 1.07 × 104 800 0.389 1.23 × 104 900 0.437 1.38 × 104 1000 0.486 1.53 × 104 2000 0.972 3.07 × 104 3000 1.46 4.60 × 104 4000 1.94 6.14 × 104 5000 2.43 7.67 × 104 6000 2.92 9.21 × 104 7000 3.40 1.07 × 105 8000 3.89 1.23 × 105 9000 4.37 1.38 × 105 1.00 × 104 4.86 1.53 × 105 1.94 × 104 9.41 2.97 × 105
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 35.0 0.0415 839 40.0 0.0475 959 50.0 0.0593 1200 60.0 0.0712 1440 70.0 0.0831 1680 80.0 0.0949 1920 90.0 0.107 2160 100 0.119 2400 200 0.237 4800 300 0.356 7190 400 0.475 9590 500 0.593 1.20 × 104 600 0.712 1.44 × 104 700 0.831 1.68 × 104 800 0.949 1.92 × 104 900 1.07 2.16 × 104 1000 1.19 2.40 × 104 2000 2.37 4.80 × 104 3000 3.56 7.19 × 104 4000 4.75 9.59 × 104 5000 5.93 1.20 × 105 6000 7.12 1.44 × 105 6840 8.12 1.64 × 105
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 35.0 0.0861 1210 40.0 0.0984 1380 50.0 0.123 1730 60.0 0.148 2070 70.0 0.172 2420 80.0 0.197 2760 90.0 0.221 3110 100 0.246 3450 200 0.492 6910 300 0.738 1.04 × 104 400 0.984 1.38 × 104 500 1.23 1.73 × 104 600 1.48 2.07 × 104 700 1.72 2.42 × 104 800 1.97 2.76 × 104 900 2.21 3.11 × 104 1000 2.46 3.45 × 104 2000 4.92 6.91 × 104 3000 7.38 1.04 × 105 3300 8.12 1.14 × 105
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 35.0 0.272 2150 40.0 0.311 2460 50.0 0.389 3070 60.0 0.467 3680 70.0 0.544 4300 80.0 0.622 4910 90.0 0.700 5520 100 0.778 6140 200 1.56 1.23 × 104 300 2.33 1.84 × 104 400 3.11 2.46 × 104 500 3.89 3.07 × 104 600 4.67 3.68 × 104 700 5.44 4.30 × 104 800 6.22 4.91 × 104 900 7.00 5.52 × 104 1000 7.78 6.14 × 104 1040 8.12 6.41 × 104
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 35.0 0.665 3360 40.0 0.759 3840 50.0 0.949 4800 60.0 1.14 5750 70.0 1.33 6710 80.0 1.52 7670 90.0 1.71 8630 100 1.90 9590 200 3.80 1.92 × 104 300 5.70 2.88 × 104 400 7.59 3.84 × 104 428 8.12 4.10 × 104
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 35.0 1.38 4830 40.0 1.57 5520 50.0 1.97 6910 60.0 2.36 8290 70.0 2.76 9670 80.0 3.15 1.10 × 104 90.0 3.54 1.24 × 104 100 3.94 1.38 × 104 200 7.87 2.76 × 104 206 8.12 2.85 × 104
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 35.0 2.55 6580 40.0 2.92 7520 50.0 3.65 9400 60.0 4.38 1.13 × 104 70.0 5.11 1.32 × 104 80.0 5.83 1.50 × 104 90.0 6.56 1.69 × 104 100 7.29 1.88 × 104 111 8.12 2.09 × 104
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 35.0 4.35 8590 40.0 4.98 9820 50.0 6.22 1.23 × 104 60.0 7.47 1.47 × 104 65.3 8.12 1.60 × 104
 Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 35.0 6.98 1.09 × 104 40.0 7.97 1.24 × 104 40.7 8.12 1.27 × 104