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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four Equal Spans » S Section Steel I Beam » S8 × 23
S Section 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 = 64.9 in4) for the S8 × 23 S Section 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: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 23.0 1.03 × 10-5 16.4 30.0 1.34 × 10-5 21.4 40.0 1.78 × 10-5 28.5 50.0 2.23 × 10-5 35.6 60.0 2.68 × 10-5 42.8 70.0 3.12 × 10-5 49.9 80.0 3.57 × 10-5 57.0 90.0 4.01 × 10-5 64.2 100 4.46 × 10-5 71.3 200 8.92 × 10-5 143 300 1.34 × 10-4 214 400 1.78 × 10-4 285 500 2.23 × 10-4 356 600 2.68 × 10-4 428 700 3.12 × 10-4 499 800 3.57 × 10-4 570 900 4.01 × 10-4 642 1000 4.46 × 10-4 713 2000 8.92 × 10-4 1430 3000 0.00134 2140 4000 0.00178 2850 5000 0.00223 3560 6000 0.00268 4280 7000 0.00312 4990 8000 0.00357 5700 9000 0.00401 6420 1.00 × 104 0.00446 7130 2.00 × 104 0.00892 1.43 × 104 3.00 × 104 0.0134 2.14 × 104 4.00 × 104 0.0178 2.85 × 104 5.00 × 104 0.0223 3.56 × 104 6.00 × 104 0.0268 4.28 × 104 7.00 × 104 0.0312 4.99 × 104 8.00 × 104 0.0357 5.70 × 104 9.00 × 104 0.0401 6.42 × 104 1.00 × 105 0.0446 7.13 × 104 2.00 × 105 0.0892 1.43 × 105 3.00 × 105 0.134 2.14 × 105 4.00 × 105 0.178 2.85 × 105 4.17 × 105 0.186 2.97 × 105
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 23.0 7.92 × 10-5 45.5 30.0 1.03 × 10-4 59.4 40.0 1.38 × 10-4 79.2 50.0 1.72 × 10-4 99.0 60.0 2.07 × 10-4 119 70.0 2.41 × 10-4 139 80.0 2.75 × 10-4 158 90.0 3.10 × 10-4 178 100 3.44 × 10-4 198 200 6.88 × 10-4 396 300 0.00103 594 400 0.00138 792 500 0.00172 990 600 0.00207 1190 700 0.00241 1390 800 0.00275 1580 900 0.00310 1780 1000 0.00344 1980 2000 0.00688 3960 3000 0.0103 5940 4000 0.0138 7920 5000 0.0172 9900 6000 0.0207 1.19 × 104 7000 0.0241 1.39 × 104 8000 0.0275 1.58 × 104 9000 0.0310 1.78 × 104 1.00 × 104 0.0344 1.98 × 104 2.00 × 104 0.0688 3.96 × 104 3.00 × 104 0.103 5.94 × 104 4.00 × 104 0.138 7.92 × 104 5.00 × 104 0.172 9.90 × 104 6.00 × 104 0.207 1.19 × 105 7.00 × 104 0.241 1.39 × 105 8.00 × 104 0.275 1.58 × 105 9.00 × 104 0.310 1.78 × 105 1.00 × 105 0.344 1.98 × 105 1.50 × 105 0.516 2.97 × 105
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 23.0 0.00127 182 30.0 0.00165 238 40.0 0.00220 317 50.0 0.00275 396 60.0 0.00330 475 70.0 0.00386 554 80.0 0.00441 634 90.0 0.00496 713 100 0.00551 792 200 0.0110 1580 300 0.0165 2380 400 0.0220 3170 500 0.0275 3960 600 0.0330 4750 700 0.0386 5540 800 0.0441 6340 900 0.0496 7130 1000 0.0551 7920 2000 0.110 1.58 × 104 3000 0.165 2.38 × 104 4000 0.220 3.17 × 104 5000 0.275 3.96 × 104 6000 0.330 4.75 × 104 7000 0.386 5.54 × 104 8000 0.441 6.34 × 104 9000 0.496 7.13 × 104 1.00 × 104 0.551 7.92 × 104 2.00 × 104 1.10 1.58 × 105 3.00 × 104 1.65 2.38 × 105 3.75 × 104 2.07 2.97 × 105
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 23.0 0.00641 410 30.0 0.00836 535 40.0 0.0112 713 50.0 0.0139 891 60.0 0.0167 1070 70.0 0.0195 1250 80.0 0.0223 1430 90.0 0.0251 1600 100 0.0279 1780 200 0.0558 3560 300 0.0836 5350 400 0.112 7130 500 0.139 8910 600 0.167 1.07 × 104 700 0.195 1.25 × 104 800 0.223 1.43 × 104 900 0.251 1.60 × 104 1000 0.279 1.78 × 104 2000 0.558 3.56 × 104 3000 0.836 5.35 × 104 4000 1.12 7.13 × 104 5000 1.39 8.91 × 104 6000 1.67 1.07 × 105 7000 1.95 1.25 × 105 8000 2.23 1.43 × 105 9000 2.51 1.60 × 105 1.00 × 104 2.79 1.78 × 105 1.67 × 104 4.65 2.97 × 105
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 23.0 0.0203 729 30.0 0.0264 951 40.0 0.0352 1270 50.0 0.0441 1580 60.0 0.0529 1900 70.0 0.0617 2220 80.0 0.0705 2530 90.0 0.0793 2850 100 0.0881 3170 200 0.176 6340 300 0.264 9510 400 0.352 1.27 × 104 500 0.441 1.58 × 104 600 0.529 1.90 × 104 700 0.617 2.22 × 104 800 0.705 2.53 × 104 900 0.793 2.85 × 104 1000 0.881 3.17 × 104 2000 1.76 6.34 × 104 3000 2.64 9.51 × 104 4000 3.52 1.27 × 105 5000 4.41 1.58 × 105 6000 5.29 1.90 × 105 7000 6.17 2.22 × 105 8000 7.05 2.53 × 105 9000 7.93 2.85 × 105 9370 8.26 2.97 × 105
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 23.0 0.0495 1140 30.0 0.0645 1490 40.0 0.0861 1980 50.0 0.108 2480 60.0 0.129 2970 70.0 0.151 3470 80.0 0.172 3960 90.0 0.194 4460 100 0.215 4950 200 0.430 9900 300 0.645 1.49 × 104 400 0.861 1.98 × 104 500 1.08 2.48 × 104 600 1.29 2.97 × 104 700 1.51 3.47 × 104 800 1.72 3.96 × 104 900 1.94 4.46 × 104 1000 2.15 4.95 × 104 2000 4.30 9.90 × 104 3000 6.45 1.49 × 105 3720 8.00 1.84 × 105
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 23.0 0.103 1640 30.0 0.134 2140 40.0 0.178 2850 50.0 0.223 3560 60.0 0.268 4280 70.0 0.312 4990 80.0 0.357 5700 90.0 0.401 6420 100 0.446 7130 200 0.892 1.43 × 104 300 1.34 2.14 × 104 400 1.78 2.85 × 104 500 2.23 3.56 × 104 600 2.68 4.28 × 104 700 3.12 4.99 × 104 800 3.57 5.70 × 104 900 4.01 6.42 × 104 1000 4.46 7.13 × 104 1790 8.00 1.28 × 105
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 23.0 0.324 2910 30.0 0.423 3800 40.0 0.564 5070 50.0 0.705 6340 60.0 0.846 7600 70.0 0.987 8870 80.0 1.13 1.01 × 104 90.0 1.27 1.14 × 104 100 1.41 1.27 × 104 200 2.82 2.53 × 104 300 4.23 3.80 × 104 400 5.64 5.07 × 104 500 7.05 6.34 × 104 567 8.00 7.19 × 104
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 23.0 0.792 4550 30.0 1.03 5940 40.0 1.38 7920 50.0 1.72 9900 60.0 2.07 1.19 × 104 70.0 2.41 1.39 × 104 80.0 2.75 1.58 × 104 90.0 3.10 1.78 × 104 100 3.44 1.98 × 104 200 6.88 3.96 × 104 232 8.00 4.60 × 104
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 23.0 1.64 6560 30.0 2.14 8550 40.0 2.85 1.14 × 104 50.0 3.57 1.43 × 104 60.0 4.28 1.71 × 104 70.0 5.00 2.00 × 104 80.0 5.71 2.28 × 104 90.0 6.42 2.57 × 104 100 7.14 2.85 × 104 112 8.00 3.20 × 104
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 23.0 3.04 8930 30.0 3.97 1.16 × 104 40.0 5.29 1.55 × 104 50.0 6.61 1.94 × 104 60.0 7.93 2.33 × 104 60.5 8.00 2.35 × 104
 Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 23.0 5.19 1.17 × 104 30.0 6.77 1.52 × 104 35.5 8.00 1.80 × 104
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