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Wide Flange Steel I Beam: W10 × 68
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four 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 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 = 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 5.00 × 10-6 10.4
70.0 5.14 × 10-6 10.7
80.0 5.88 × 10-6 12.2
90.0 6.61 × 10-6 13.7
100 7.35 × 10-6 15.3
200 1.47 × 10-5 30.5
300 2.20 × 10-5 45.8
400 2.94 × 10-5 61.1
500 3.67 × 10-5 76.3
600 4.41 × 10-5 91.6
700 5.14 × 10-5 107
800 5.88 × 10-5 122
900 6.61 × 10-5 137
1000 7.35 × 10-5 153
2000 1.47 × 10-4 305
3000 2.20 × 10-4 458
4000 2.94 × 10-4 611
5000 3.67 × 10-4 763
6000 4.41 × 10-4 916
7000 5.14 × 10-4 1070
8000 5.88 × 10-4 1220
9000 6.61 × 10-4 1370
1.00 × 104 7.35 × 10-4 1530
2.00 × 104 0.00147 3050
3.00 × 104 0.00220 4580
4.00 × 104 0.00294 6110
5.00 × 104 0.00367 7630
6.00 × 104 0.00441 9160
7.00 × 104 0.00514 1.07 × 104
8.00 × 104 0.00588 1.22 × 104
9.00 × 104 0.00661 1.37 × 104
1.00 × 105 0.00735 1.53 × 104
2.00 × 105 0.0147 3.05 × 104
3.00 × 105 0.0220 4.58 × 104
4.00 × 105 0.0294 6.11 × 104
5.00 × 105 0.0367 7.63 × 104
6.00 × 105 0.0441 9.16 × 104
7.00 × 105 0.0514 1.07 × 105
8.00 × 105 0.0588 1.22 × 105
9.00 × 105 0.0661 1.37 × 105
1.00 × 106 0.0735 1.53 × 105
1.95 × 106 0.143 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 3.86 × 10-5 28.8
70.0 3.97 × 10-5 29.7
80.0 4.54 × 10-5 33.9
90.0 5.10 × 10-5 38.2
100 5.67 × 10-5 42.4
200 1.13 × 10-4 84.8
300 1.70 × 10-4 127
400 2.27 × 10-4 170
500 2.83 × 10-4 212
600 3.40 × 10-4 254
700 3.97 × 10-4 297
800 4.54 × 10-4 339
900 5.10 × 10-4 382
1000 5.67 × 10-4 424
2000 0.00113 848
3000 0.00170 1270
4000 0.00227 1700
5000 0.00283 2120
6000 0.00340 2540
7000 0.00397 2970
8000 0.00454 3390
9000 0.00510 3820
1.00 × 104 0.00567 4240
2.00 × 104 0.0113 8480
3.00 × 104 0.0170 1.27 × 104
4.00 × 104 0.0227 1.70 × 104
5.00 × 104 0.0283 2.12 × 104
6.00 × 104 0.0340 2.54 × 104
7.00 × 104 0.0397 2.97 × 104
8.00 × 104 0.0454 3.39 × 104
9.00 × 104 0.0510 3.82 × 104
1.00 × 105 0.0567 4.24 × 104
2.00 × 105 0.113 8.48 × 104
3.00 × 105 0.170 1.27 × 105
4.00 × 105 0.227 1.70 × 105
5.00 × 105 0.283 2.12 × 105
6.00 × 105 0.340 2.54 × 105
7.00 × 105 0.397 2.97 × 105
7.00 × 105 0.397 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 6.17 × 10-4 115
70.0 6.35 × 10-4 119
80.0 7.26 × 10-4 136
90.0 8.16 × 10-4 153
100 9.07 × 10-4 170
200 0.00181 339
300 0.00272 509
400 0.00363 678
500 0.00454 848
600 0.00544 1020
700 0.00635 1190
800 0.00726 1360
900 0.00816 1530
1000 0.00907 1700
2000 0.0181 3390
3000 0.0272 5090
4000 0.0363 6780
5000 0.0454 8480
6000 0.0544 1.02 × 104
7000 0.0635 1.19 × 104
8000 0.0726 1.36 × 104
9000 0.0816 1.53 × 104
1.00 × 104 0.0907 1.70 × 104
2.00 × 104 0.181 3.39 × 104
3.00 × 104 0.272 5.09 × 104
4.00 × 104 0.363 6.78 × 104
5.00 × 104 0.454 8.48 × 104
6.00 × 104 0.544 1.02 × 105
7.00 × 104 0.635 1.19 × 105
8.00 × 104 0.726 1.36 × 105
9.00 × 104 0.816 1.53 × 105
1.00 × 105 0.907 1.70 × 105
1.75 × 105 1.59 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 0.00312 260
70.0 0.00321 267
80.0 0.00367 305
90.0 0.00413 343
100 0.00459 382
200 0.00919 763
300 0.0138 1140
400 0.0184 1530
500 0.0230 1910
600 0.0276 2290
700 0.0321 2670
800 0.0367 3050
900 0.0413 3430
1000 0.0459 3820
2000 0.0919 7630
3000 0.138 1.14 × 104
4000 0.184 1.53 × 104
5000 0.230 1.91 × 104
6000 0.276 2.29 × 104
7000 0.321 2.67 × 104
8000 0.367 3.05 × 104
9000 0.413 3.43 × 104
1.00 × 104 0.459 3.82 × 104
2.00 × 104 0.919 7.63 × 104
3.00 × 104 1.38 1.14 × 105
4.00 × 104 1.84 1.53 × 105
5.00 × 104 2.30 1.91 × 105
6.00 × 104 2.76 2.29 × 105
7.00 × 104 3.21 2.67 × 105
7.78 × 104 3.57 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 0.00987 461
70.0 0.0102 475
80.0 0.0116 543
90.0 0.0131 611
100 0.0145 678
200 0.0290 1360
300 0.0435 2040
400 0.0581 2710
500 0.0726 3390
600 0.0871 4070
700 0.102 4750
800 0.116 5430
900 0.131 6110
1000 0.145 6780
2000 0.290 1.36 × 104
3000 0.435 2.04 × 104
4000 0.581 2.71 × 104
5000 0.726 3.39 × 104
6000 0.871 4.07 × 104
7000 1.02 4.75 × 104
8000 1.16 5.43 × 104
9000 1.31 6.11 × 104
1.00 × 104 1.45 6.78 × 104
2.00 × 104 2.90 1.36 × 105
3.00 × 104 4.35 2.04 × 105
4.00 × 104 5.81 2.71 × 105
4.38 × 104 6.35 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 0.0241 721
70.0 0.0248 742
80.0 0.0283 848
90.0 0.0319 954
100 0.0354 1060
200 0.0709 2120
300 0.106 3180
400 0.142 4240
500 0.177 5300
600 0.213 6360
700 0.248 7420
800 0.283 8480
900 0.319 9540
1000 0.354 1.06 × 104
2000 0.709 2.12 × 104
3000 1.06 3.18 × 104
4000 1.42 4.24 × 104
5000 1.77 5.30 × 104
6000 2.13 6.36 × 104
7000 2.48 7.42 × 104
8000 2.83 8.48 × 104
9000 3.19 9.54 × 104
1.00 × 104 3.54 1.06 × 105
2.00 × 104 7.09 2.12 × 105
2.80 × 104 9.93 2.97 × 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 0.0500 1040
70.0 0.0514 1070
80.0 0.0588 1220
90.0 0.0661 1370
100 0.0735 1530
200 0.147 3050
300 0.220 4580
400 0.294 6110
500 0.367 7630
600 0.441 9160
700 0.514 1.07 × 104
800 0.588 1.22 × 104
900 0.661 1.37 × 104
1000 0.735 1.53 × 104
2000 1.47 3.05 × 104
3000 2.20 4.58 × 104
4000 2.94 6.11 × 104
5000 3.67 7.63 × 104
6000 4.41 9.16 × 104
7000 5.14 1.07 × 105
8000 5.88 1.22 × 105
9000 6.61 1.37 × 105
1.00 × 104 7.35 1.53 × 105
1.95 × 104 14.3 2.97 × 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 0.158 1850
70.0 0.163 1900
80.0 0.186 2170
90.0 0.209 2440
100 0.232 2710
200 0.464 5430
300 0.697 8140
400 0.929 1.09 × 104
500 1.16 1.36 × 104
600 1.39 1.63 × 104
700 1.63 1.90 × 104
800 1.86 2.17 × 104
900 2.09 2.44 × 104
1000 2.32 2.71 × 104
2000 4.64 5.43 × 104
3000 6.97 8.14 × 104
4000 9.29 1.09 × 105
4480 10.4 1.22 × 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 0.386 2880
70.0 0.397 2970
80.0 0.454 3390
90.0 0.510 3820
100 0.567 4240
200 1.13 8480
300 1.70 1.27 × 104
400 2.27 1.70 × 104
500 2.83 2.12 × 104
600 3.40 2.54 × 104
700 3.97 2.97 × 104
800 4.54 3.39 × 104
900 5.10 3.82 × 104
1000 5.67 4.24 × 104
1830 10.4 7.78 × 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 0.799 4150
70.0 0.823 4270
80.0 0.941 4890
90.0 1.06 5500
100 1.18 6110
200 2.35 1.22 × 104
300 3.53 1.83 × 104
400 4.70 2.44 × 104
500 5.88 3.05 × 104
600 7.05 3.66 × 104
700 8.23 4.27 × 104
800 9.41 4.89 × 104
885 10.4 5.40 × 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 1.48 5650
70.0 1.52 5820
80.0 1.74 6650
90.0 1.96 7480
100 2.18 8310
200 4.36 1.66 × 104
300 6.53 2.49 × 104
400 8.71 3.32 × 104
477 10.4 3.97 × 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 2.53 7380
70.0 2.60 7600
80.0 2.97 8680
90.0 3.34 9770
100 3.72 1.09 × 104
200 7.43 2.17 × 104
280 10.4 3.04 × 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 4.05 9340
70.0 4.17 9620
80.0 4.76 1.10 × 104
90.0 5.36 1.24 × 104
100 5.95 1.37 × 104
175 10.4 2.40 × 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 6.17 1.15 × 104
70.0 6.35 1.19 × 104
80.0 7.26 1.36 × 104
90.0 8.16 1.53 × 104
100 9.07 1.70 × 104
115 10.4 1.94 × 104
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