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Wide Flange Steel I Beam: W8 × 48
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W8 × 48
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in two equal spans, we compute the displacement at the middle of each span w_mid and the maximum normal stress stress_max occuring at the center support of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 184 in4) for the W8 × 48 Wide Flange 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
L = 90 ft
L = 100 ft
  
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 6.24 × 10-6 15.0
50.0 6.50 × 10-6 15.6
60.0 7.80 × 10-6 18.7
70.0 9.11 × 10-6 21.8
80.0 1.04 × 10-5 24.9
90.0 1.17 × 10-5 28.1
100 1.30 × 10-5 31.2
200 2.60 × 10-5 62.4
300 3.90 × 10-5 93.5
400 5.20 × 10-5 125
500 6.50 × 10-5 156
600 7.80 × 10-5 187
700 9.11 × 10-5 218
800 1.04 × 10-4 249
900 1.17 × 10-4 281
1000 1.30 × 10-4 312
2000 2.60 × 10-4 624
3000 3.90 × 10-4 935
4000 5.20 × 10-4 1250
5000 6.50 × 10-4 1560
6000 7.80 × 10-4 1870
7000 9.11 × 10-4 2180
8000 0.00104 2490
9000 0.00117 2810
1.00 × 104 0.00130 3120
2.00 × 104 0.00260 6240
3.00 × 104 0.00390 9350
4.00 × 104 0.00520 1.25 × 104
5.00 × 104 0.00650 1.56 × 104
6.00 × 104 0.00780 1.87 × 104
7.00 × 104 0.00911 2.18 × 104
8.00 × 104 0.0104 2.49 × 104
9.00 × 104 0.0117 2.81 × 104
1.00 × 105 0.0130 3.12 × 104
2.00 × 105 0.0260 6.24 × 104
3.00 × 105 0.0390 9.35 × 104
4.00 × 105 0.0520 1.25 × 105
5.00 × 105 0.0650 1.56 × 105
6.00 × 105 0.0780 1.87 × 105
7.00 × 105 0.0911 2.18 × 105
8.00 × 105 0.104 2.49 × 105
9.00 × 105 0.117 2.81 × 105
9.53 × 105 0.124 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 4.82 × 10-5 41.6
50.0 5.02 × 10-5 43.3
60.0 6.02 × 10-5 52.0
70.0 7.03 × 10-5 60.6
80.0 8.03 × 10-5 69.3
90.0 9.03 × 10-5 78.0
100 1.00 × 10-4 86.6
200 2.01 × 10-4 173
300 3.01 × 10-4 260
400 4.01 × 10-4 346
500 5.02 × 10-4 433
600 6.02 × 10-4 520
700 7.03 × 10-4 606
800 8.03 × 10-4 693
900 9.03 × 10-4 780
1000 0.00100 866
2000 0.00201 1730
3000 0.00301 2600
4000 0.00401 3460
5000 0.00502 4330
6000 0.00602 5200
7000 0.00703 6060
8000 0.00803 6930
9000 0.00903 7800
1.00 × 104 0.0100 8660
2.00 × 104 0.0201 1.73 × 104
3.00 × 104 0.0301 2.60 × 104
4.00 × 104 0.0401 3.46 × 104
5.00 × 104 0.0502 4.33 × 104
6.00 × 104 0.0602 5.20 × 104
7.00 × 104 0.0703 6.06 × 104
8.00 × 104 0.0803 6.93 × 104
9.00 × 104 0.0903 7.80 × 104
1.00 × 105 0.100 8.66 × 104
2.00 × 105 0.201 1.73 × 105
3.00 × 105 0.301 2.60 × 105
3.43 × 105 0.344 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 7.71 × 10-4 166
50.0 8.03 × 10-4 173
60.0 9.64 × 10-4 208
70.0 0.00112 243
80.0 0.00128 277
90.0 0.00145 312
100 0.00161 346
200 0.00321 693
300 0.00482 1040
400 0.00642 1390
500 0.00803 1730
600 0.00964 2080
700 0.0112 2430
800 0.0128 2770
900 0.0145 3120
1000 0.0161 3460
2000 0.0321 6930
3000 0.0482 1.04 × 104
4000 0.0642 1.39 × 104
5000 0.0803 1.73 × 104
6000 0.0964 2.08 × 104
7000 0.112 2.43 × 104
8000 0.128 2.77 × 104
9000 0.145 3.12 × 104
1.00 × 104 0.161 3.46 × 104
2.00 × 104 0.321 6.93 × 104
3.00 × 104 0.482 1.04 × 105
4.00 × 104 0.642 1.39 × 105
5.00 × 104 0.803 1.73 × 105
6.00 × 104 0.964 2.08 × 105
7.00 × 104 1.12 2.43 × 105
8.00 × 104 1.28 2.77 × 105
8.57 × 104 1.38 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.00390 374
50.0 0.00406 390
60.0 0.00488 468
70.0 0.00569 546
80.0 0.00650 624
90.0 0.00732 702
100 0.00813 780
200 0.0163 1560
300 0.0244 2340
400 0.0325 3120
500 0.0406 3900
600 0.0488 4680
700 0.0569 5460
800 0.0650 6240
900 0.0732 7020
1000 0.0813 7800
2000 0.163 1.56 × 104
3000 0.244 2.34 × 104
4000 0.325 3.12 × 104
5000 0.406 3.90 × 104
6000 0.488 4.68 × 104
7000 0.569 5.46 × 104
8000 0.650 6.24 × 104
9000 0.732 7.02 × 104
1.00 × 104 0.813 7.80 × 104
2.00 × 104 1.63 1.56 × 105
3.00 × 104 2.44 2.34 × 105
3.81 × 104 3.10 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.0123 665
50.0 0.0128 693
60.0 0.0154 832
70.0 0.0180 970
80.0 0.0206 1110
90.0 0.0231 1250
100 0.0257 1390
200 0.0514 2770
300 0.0771 4160
400 0.103 5540
500 0.128 6930
600 0.154 8320
700 0.180 9700
800 0.206 1.11 × 104
900 0.231 1.25 × 104
1000 0.257 1.39 × 104
2000 0.514 2.77 × 104
3000 0.771 4.16 × 104
4000 1.03 5.54 × 104
5000 1.28 6.93 × 104
6000 1.54 8.32 × 104
7000 1.80 9.70 × 104
8000 2.06 1.11 × 105
9000 2.31 1.25 × 105
1.00 × 104 2.57 1.39 × 105
2.00 × 104 5.14 2.77 × 105
2.14 × 104 5.51 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.0301 1040
50.0 0.0314 1080
60.0 0.0376 1300
70.0 0.0439 1520
80.0 0.0502 1730
90.0 0.0565 1950
100 0.0627 2170
200 0.125 4330
300 0.188 6500
400 0.251 8660
500 0.314 1.08 × 104
600 0.376 1.30 × 104
700 0.439 1.52 × 104
800 0.502 1.73 × 104
900 0.565 1.95 × 104
1000 0.627 2.17 × 104
2000 1.25 4.33 × 104
3000 1.88 6.50 × 104
4000 2.51 8.66 × 104
5000 3.14 1.08 × 105
6000 3.76 1.30 × 105
7000 4.39 1.52 × 105
8000 5.02 1.73 × 105
9000 5.65 1.95 × 105
1.00 × 104 6.27 2.17 × 105
1.37 × 104 8.61 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.0624 1500
50.0 0.0650 1560
60.0 0.0780 1870
70.0 0.0911 2180
80.0 0.104 2490
90.0 0.117 2810
100 0.130 3120
200 0.260 6240
300 0.390 9350
400 0.520 1.25 × 104
500 0.650 1.56 × 104
600 0.780 1.87 × 104
700 0.911 2.18 × 104
800 1.04 2.49 × 104
900 1.17 2.81 × 104
1000 1.30 3.12 × 104
2000 2.60 6.24 × 104
3000 3.90 9.35 × 104
4000 5.20 1.25 × 105
5000 6.50 1.56 × 105
6000 7.80 1.87 × 105
6530 8.50 2.04 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.197 2660
50.0 0.206 2770
60.0 0.247 3330
70.0 0.288 3880
80.0 0.329 4430
90.0 0.370 4990
100 0.411 5540
200 0.822 1.11 × 104
300 1.23 1.66 × 104
400 1.64 2.22 × 104
500 2.06 2.77 × 104
600 2.47 3.33 × 104
700 2.88 3.88 × 104
800 3.29 4.43 × 104
900 3.70 4.99 × 104
1000 4.11 5.54 × 104
2000 8.22 1.11 × 105
2070 8.50 1.15 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.482 4160
50.0 0.502 4330
60.0 0.602 5200
70.0 0.703 6060
80.0 0.803 6930
90.0 0.903 7800
100 1.00 8660
200 2.01 1.73 × 104
300 3.01 2.60 × 104
400 4.01 3.46 × 104
500 5.02 4.33 × 104
600 6.02 5.20 × 104
700 7.03 6.06 × 104
800 8.03 6.93 × 104
847 8.50 7.34 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.999 5990
50.0 1.04 6240
60.0 1.25 7480
70.0 1.46 8730
80.0 1.67 9980
90.0 1.87 1.12 × 104
100 2.08 1.25 × 104
200 4.16 2.49 × 104
300 6.24 3.74 × 104
400 8.33 4.99 × 104
408 8.50 5.09 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 1.85 8150
50.0 1.93 8490
60.0 2.31 1.02 × 104
70.0 2.70 1.19 × 104
80.0 3.08 1.36 × 104
90.0 3.47 1.53 × 104
100 3.86 1.70 × 104
200 7.71 3.40 × 104
220 8.50 3.74 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 3.16 1.06 × 104
50.0 3.29 1.11 × 104
60.0 3.95 1.33 × 104
70.0 4.60 1.55 × 104
80.0 5.26 1.77 × 104
90.0 5.92 2.00 × 104
100 6.58 2.22 × 104
129 8.50 2.87 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 5.06 1.35 × 104
50.0 5.27 1.40 × 104
60.0 6.32 1.68 × 104
70.0 7.38 1.96 × 104
80.0 8.43 2.25 × 104
80.7 8.50 2.26 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 7.71 1.66 × 104
50.0 8.03 1.73 × 104
52.9 8.50 1.83 × 104
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