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S Section Steel I Beam: S8 × 23
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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 stress_max 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 Yield 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.
L = 3 ft
L = 5 ft
L = 10 ft
L = 15 ft
L = 20 ft
L = 25 ft
L = 30 ft
L = 40 ft
L = 50 ft
L = 60 ft
L = 70 ft
L = 80 ft
   
Steel I Beam: S8 × 23 (S8 inch tall × 23 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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
P (lbf/ft) w_max (in) stress_max (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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