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Wide Flange Steel I Beam: W10 × 68
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W10 × 68
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 stress_max 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 = 394 in4) for the W10 × 68 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: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 5.39 × 10-6 9.69
70.0 5.55 × 10-6 9.98
80.0 6.34 × 10-6 11.4
90.0 7.14 × 10-6 12.8
100 7.93 × 10-6 14.3
200 1.59 × 10-5 28.5
300 2.38 × 10-5 42.8
400 3.17 × 10-5 57.0
500 3.97 × 10-5 71.3
600 4.76 × 10-5 85.5
700 5.55 × 10-5 99.8
800 6.34 × 10-5 114
900 7.14 × 10-5 128
1000 7.93 × 10-5 143
2000 1.59 × 10-4 285
3000 2.38 × 10-4 428
4000 3.17 × 10-4 570
5000 3.97 × 10-4 713
6000 4.76 × 10-4 855
7000 5.55 × 10-4 998
8000 6.34 × 10-4 1140
9000 7.14 × 10-4 1280
1.00 × 104 7.93 × 10-4 1430
2.00 × 104 0.00159 2850
3.00 × 104 0.00238 4280
4.00 × 104 0.00317 5700
5.00 × 104 0.00397 7130
6.00 × 104 0.00476 8550
7.00 × 104 0.00555 9980
8.00 × 104 0.00634 1.14 × 104
9.00 × 104 0.00714 1.28 × 104
1.00 × 105 0.00793 1.43 × 104
2.00 × 105 0.0159 2.85 × 104
3.00 × 105 0.0238 4.28 × 104
4.00 × 105 0.0317 5.70 × 104
5.00 × 105 0.0397 7.13 × 104
6.00 × 105 0.0476 8.55 × 104
7.00 × 105 0.0555 9.98 × 104
8.00 × 105 0.0634 1.14 × 105
9.00 × 105 0.0714 1.28 × 105
1.00 × 106 0.0793 1.43 × 105
2.00 × 106 0.159 2.85 × 105
2.08 × 106 0.165 2.97 × 105
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 4.16 × 10-5 26.9
70.0 4.28 × 10-5 27.7
80.0 4.90 × 10-5 31.7
90.0 5.51 × 10-5 35.6
100 6.12 × 10-5 39.6
200 1.22 × 10-4 79.2
300 1.84 × 10-4 119
400 2.45 × 10-4 158
500 3.06 × 10-4 198
600 3.67 × 10-4 238
700 4.28 × 10-4 277
800 4.90 × 10-4 317
900 5.51 × 10-4 356
1000 6.12 × 10-4 396
2000 0.00122 792
3000 0.00184 1190
4000 0.00245 1580
5000 0.00306 1980
6000 0.00367 2380
7000 0.00428 2770
8000 0.00490 3170
9000 0.00551 3560
1.00 × 104 0.00612 3960
2.00 × 104 0.0122 7920
3.00 × 104 0.0184 1.19 × 104
4.00 × 104 0.0245 1.58 × 104
5.00 × 104 0.0306 1.98 × 104
6.00 × 104 0.0367 2.38 × 104
7.00 × 104 0.0428 2.77 × 104
8.00 × 104 0.0490 3.17 × 104
9.00 × 104 0.0551 3.56 × 104
1.00 × 105 0.0612 3.96 × 104
2.00 × 105 0.122 7.92 × 104
3.00 × 105 0.184 1.19 × 105
4.00 × 105 0.245 1.58 × 105
5.00 × 105 0.306 1.98 × 105
6.00 × 105 0.367 2.38 × 105
7.00 × 105 0.428 2.77 × 105
7.50 × 105 0.459 2.97 × 105
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 6.66 × 10-4 108
70.0 6.85 × 10-4 111
80.0 7.83 × 10-4 127
90.0 8.81 × 10-4 143
100 9.79 × 10-4 158
200 0.00196 317
300 0.00294 475
400 0.00392 634
500 0.00490 792
600 0.00587 950
700 0.00685 1110
800 0.00783 1270
900 0.00881 1430
1000 0.00979 1580
2000 0.0196 3170
3000 0.0294 4750
4000 0.0392 6340
5000 0.0490 7920
6000 0.0587 9500
7000 0.0685 1.11 × 104
8000 0.0783 1.27 × 104
9000 0.0881 1.43 × 104
1.00 × 104 0.0979 1.58 × 104
2.00 × 104 0.196 3.17 × 104
3.00 × 104 0.294 4.75 × 104
4.00 × 104 0.392 6.34 × 104
5.00 × 104 0.490 7.92 × 104
6.00 × 104 0.587 9.50 × 104
7.00 × 104 0.685 1.11 × 105
8.00 × 104 0.783 1.27 × 105
9.00 × 104 0.881 1.43 × 105
1.00 × 105 0.979 1.58 × 105
1.88 × 105 1.84 2.97 × 105
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.00337 242
70.0 0.00347 249
80.0 0.00397 285
90.0 0.00446 321
100 0.00496 356
200 0.00991 713
300 0.0149 1070
400 0.0198 1430
500 0.0248 1780
600 0.0297 2140
700 0.0347 2490
800 0.0397 2850
900 0.0446 3210
1000 0.0496 3560
2000 0.0991 7130
3000 0.149 1.07 × 104
4000 0.198 1.43 × 104
5000 0.248 1.78 × 104
6000 0.297 2.14 × 104
7000 0.347 2.49 × 104
8000 0.397 2.85 × 104
9000 0.446 3.21 × 104
1.00 × 104 0.496 3.56 × 104
2.00 × 104 0.991 7.13 × 104
3.00 × 104 1.49 1.07 × 105
4.00 × 104 1.98 1.43 × 105
5.00 × 104 2.48 1.78 × 105
6.00 × 104 2.97 2.14 × 105
7.00 × 104 3.47 2.49 × 105
8.00 × 104 3.97 2.85 × 105
8.34 × 104 4.13 2.97 × 105
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.0107 431
70.0 0.0110 443
80.0 0.0125 507
90.0 0.0141 570
100 0.0157 634
200 0.0313 1270
300 0.0470 1900
400 0.0627 2530
500 0.0783 3170
600 0.0940 3800
700 0.110 4430
800 0.125 5070
900 0.141 5700
1000 0.157 6340
2000 0.313 1.27 × 104
3000 0.470 1.90 × 104
4000 0.627 2.53 × 104
5000 0.783 3.17 × 104
6000 0.940 3.80 × 104
7000 1.10 4.43 × 104
8000 1.25 5.07 × 104
9000 1.41 5.70 × 104
1.00 × 104 1.57 6.34 × 104
2.00 × 104 3.13 1.27 × 105
3.00 × 104 4.70 1.90 × 105
4.00 × 104 6.27 2.53 × 105
4.69 × 104 7.35 2.97 × 105
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.0260 673
70.0 0.0268 693
80.0 0.0306 792
90.0 0.0344 891
100 0.0382 990
200 0.0765 1980
300 0.115 2970
400 0.153 3960
500 0.191 4950
600 0.229 5940
700 0.268 6930
800 0.306 7920
900 0.344 8910
1000 0.382 9900
2000 0.765 1.98 × 104
3000 1.15 2.97 × 104
4000 1.53 3.96 × 104
5000 1.91 4.95 × 104
6000 2.29 5.94 × 104
7000 2.68 6.93 × 104
8000 3.06 7.92 × 104
9000 3.44 8.91 × 104
1.00 × 104 3.82 9.90 × 104
2.00 × 104 7.65 1.98 × 105
2.72 × 104 10.4 2.69 × 105
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.0539 969
70.0 0.0555 998
80.0 0.0634 1140
90.0 0.0714 1280
100 0.0793 1430
200 0.159 2850
300 0.238 4280
400 0.317 5700
500 0.397 7130
600 0.476 8550
700 0.555 9980
800 0.634 1.14 × 104
900 0.714 1.28 × 104
1000 0.793 1.43 × 104
2000 1.59 2.85 × 104
3000 2.38 4.28 × 104
4000 3.17 5.70 × 104
5000 3.97 7.13 × 104
6000 4.76 8.55 × 104
7000 5.55 9.98 × 104
8000 6.34 1.14 × 105
9000 7.14 1.28 × 105
1.00 × 104 7.93 1.43 × 105
1.31 × 104 10.4 1.87 × 105
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.170 1720
70.0 0.175 1770
80.0 0.201 2030
90.0 0.226 2280
100 0.251 2530
200 0.501 5070
300 0.752 7600
400 1.00 1.01 × 104
500 1.25 1.27 × 104
600 1.50 1.52 × 104
700 1.75 1.77 × 104
800 2.01 2.03 × 104
900 2.26 2.28 × 104
1000 2.51 2.53 × 104
2000 5.01 5.07 × 104
3000 7.52 7.60 × 104
4000 10.0 1.01 × 105
4150 10.4 1.05 × 105
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.416 2690
70.0 0.428 2770
80.0 0.490 3170
90.0 0.551 3560
100 0.612 3960
200 1.22 7920
300 1.84 1.19 × 104
400 2.45 1.58 × 104
500 3.06 1.98 × 104
600 3.67 2.38 × 104
700 4.28 2.77 × 104
800 4.90 3.17 × 104
900 5.51 3.56 × 104
1000 6.12 3.96 × 104
1700 10.4 6.73 × 104
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.863 3880
70.0 0.888 3990
80.0 1.02 4560
90.0 1.14 5130
100 1.27 5700
200 2.54 1.14 × 104
300 3.81 1.71 × 104
400 5.08 2.28 × 104
500 6.34 2.85 × 104
600 7.61 3.42 × 104
700 8.88 3.99 × 104
800 10.2 4.56 × 104
820 10.4 4.67 × 104
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 1.60 5280
70.0 1.65 5430
80.0 1.88 6210
90.0 2.12 6980
100 2.35 7760
200 4.70 1.55 × 104
300 7.05 2.33 × 104
400 9.40 3.10 × 104
442 10.4 3.43 × 104
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 2.73 6890
70.0 2.81 7100
80.0 3.21 8110
90.0 3.61 9120
100 4.01 1.01 × 104
200 8.02 2.03 × 104
259 10.4 2.63 × 104
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 4.37 8720
70.0 4.50 8980
80.0 5.14 1.03 × 104
90.0 5.78 1.15 × 104
100 6.42 1.28 × 104
162 10.4 2.08 × 104
Steel I Beam: W10 × 68 (Wide Flange 10 inch tall × 68 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 6.66 1.08 × 104
70.0 6.85 1.11 × 104
80.0 7.83 1.27 × 104
90.0 8.81 1.43 × 104
100 9.79 1.58 × 104
106 10.4 1.68 × 104
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