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Wide Flange Steel I Beam: W14 × 68
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W14 × 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 = 723 in4) for the W14 × 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
L = 125 ft
  
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 2.94 × 10-6 7.13
70.0 3.03 × 10-6 7.34
80.0 3.46 × 10-6 8.39
90.0 3.89 × 10-6 9.44
100 4.32 × 10-6 10.5
200 8.64 × 10-6 21.0
300 1.30 × 10-5 31.5
400 1.73 × 10-5 41.9
500 2.16 × 10-5 52.4
600 2.59 × 10-5 62.9
700 3.03 × 10-5 73.4
800 3.46 × 10-5 83.9
900 3.89 × 10-5 94.4
1000 4.32 × 10-5 105
2000 8.64 × 10-5 210
3000 1.30 × 10-4 315
4000 1.73 × 10-4 419
5000 2.16 × 10-4 524
6000 2.59 × 10-4 629
7000 3.03 × 10-4 734
8000 3.46 × 10-4 839
9000 3.89 × 10-4 944
1.00 × 104 4.32 × 10-4 1050
2.00 × 104 8.64 × 10-4 2100
3.00 × 104 0.00130 3150
4.00 × 104 0.00173 4190
5.00 × 104 0.00216 5240
6.00 × 104 0.00259 6290
7.00 × 104 0.00303 7340
8.00 × 104 0.00346 8390
9.00 × 104 0.00389 9440
1.00 × 105 0.00432 1.05 × 104
2.00 × 105 0.00864 2.10 × 104
3.00 × 105 0.0130 3.15 × 104
4.00 × 105 0.0173 4.19 × 104
5.00 × 105 0.0216 5.24 × 104
6.00 × 105 0.0259 6.29 × 104
7.00 × 105 0.0303 7.34 × 104
8.00 × 105 0.0346 8.39 × 104
9.00 × 105 0.0389 9.44 × 104
1.00 × 106 0.0432 1.05 × 105
2.00 × 106 0.0864 2.10 × 105
2.83 × 106 0.122 2.97 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 2.27 × 10-5 19.8
70.0 2.33 × 10-5 20.4
80.0 2.67 × 10-5 23.3
90.0 3.00 × 10-5 26.2
100 3.33 × 10-5 29.1
200 6.67 × 10-5 58.3
300 1.00 × 10-4 87.4
400 1.33 × 10-4 117
500 1.67 × 10-4 146
600 2.00 × 10-4 175
700 2.33 × 10-4 204
800 2.67 × 10-4 233
900 3.00 × 10-4 262
1000 3.33 × 10-4 291
2000 6.67 × 10-4 583
3000 0.00100 874
4000 0.00133 1170
5000 0.00167 1460
6000 0.00200 1750
7000 0.00233 2040
8000 0.00267 2330
9000 0.00300 2620
1.00 × 104 0.00333 2910
2.00 × 104 0.00667 5830
3.00 × 104 0.0100 8740
4.00 × 104 0.0133 1.17 × 104
5.00 × 104 0.0167 1.46 × 104
6.00 × 104 0.0200 1.75 × 104
7.00 × 104 0.0233 2.04 × 104
8.00 × 104 0.0267 2.33 × 104
9.00 × 104 0.0300 2.62 × 104
1.00 × 105 0.0333 2.91 × 104
2.00 × 105 0.0667 5.83 × 104
3.00 × 105 0.100 8.74 × 104
4.00 × 105 0.133 1.17 × 105
5.00 × 105 0.167 1.46 × 105
6.00 × 105 0.200 1.75 × 105
7.00 × 105 0.233 2.04 × 105
8.00 × 105 0.267 2.33 × 105
9.00 × 105 0.300 2.62 × 105
1.00 × 106 0.333 2.91 × 105
1.02 × 106 0.340 2.97 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 3.63 × 10-4 79.2
70.0 3.74 × 10-4 81.6
80.0 4.27 × 10-4 93.2
90.0 4.80 × 10-4 105
100 5.34 × 10-4 117
200 0.00107 233
300 0.00160 350
400 0.00213 466
500 0.00267 583
600 0.00320 699
700 0.00374 816
800 0.00427 932
900 0.00480 1050
1000 0.00534 1170
2000 0.0107 2330
3000 0.0160 3500
4000 0.0213 4660
5000 0.0267 5830
6000 0.0320 6990
7000 0.0374 8160
8000 0.0427 9320
9000 0.0480 1.05 × 104
1.00 × 104 0.0534 1.17 × 104
2.00 × 104 0.107 2.33 × 104
3.00 × 104 0.160 3.50 × 104
4.00 × 104 0.213 4.66 × 104
5.00 × 104 0.267 5.83 × 104
6.00 × 104 0.320 6.99 × 104
7.00 × 104 0.374 8.16 × 104
8.00 × 104 0.427 9.32 × 104
9.00 × 104 0.480 1.05 × 105
1.00 × 105 0.534 1.17 × 105
2.00 × 105 1.07 2.33 × 105
2.55 × 105 1.36 2.97 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.00184 178
70.0 0.00189 184
80.0 0.00216 210
90.0 0.00243 236
100 0.00270 262
200 0.00540 524
300 0.00810 786
400 0.0108 1050
500 0.0135 1310
600 0.0162 1570
700 0.0189 1840
800 0.0216 2100
900 0.0243 2360
1000 0.0270 2620
2000 0.0540 5240
3000 0.0810 7860
4000 0.108 1.05 × 104
5000 0.135 1.31 × 104
6000 0.162 1.57 × 104
7000 0.189 1.84 × 104
8000 0.216 2.10 × 104
9000 0.243 2.36 × 104
1.00 × 104 0.270 2.62 × 104
2.00 × 104 0.540 5.24 × 104
3.00 × 104 0.810 7.86 × 104
4.00 × 104 1.08 1.05 × 105
5.00 × 104 1.35 1.31 × 105
6.00 × 104 1.62 1.57 × 105
7.00 × 104 1.89 1.84 × 105
8.00 × 104 2.16 2.10 × 105
9.00 × 104 2.43 2.36 × 105
1.00 × 105 2.70 2.62 × 105
1.13 × 105 3.06 2.97 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.00581 317
70.0 0.00598 326
80.0 0.00683 373
90.0 0.00768 419
100 0.00854 466
200 0.0171 932
300 0.0256 1400
400 0.0342 1860
500 0.0427 2330
600 0.0512 2800
700 0.0598 3260
800 0.0683 3730
900 0.0768 4190
1000 0.0854 4660
2000 0.171 9320
3000 0.256 1.40 × 104
4000 0.342 1.86 × 104
5000 0.427 2.33 × 104
6000 0.512 2.80 × 104
7000 0.598 3.26 × 104
8000 0.683 3.73 × 104
9000 0.768 4.19 × 104
1.00 × 104 0.854 4.66 × 104
2.00 × 104 1.71 9.32 × 104
3.00 × 104 2.56 1.40 × 105
4.00 × 104 3.42 1.86 × 105
5.00 × 104 4.27 2.33 × 105
6.00 × 104 5.12 2.80 × 105
6.37 × 104 5.44 2.97 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.0142 495
70.0 0.0146 510
80.0 0.0167 583
90.0 0.0188 655
100 0.0208 728
200 0.0417 1460
300 0.0625 2180
400 0.0834 2910
500 0.104 3640
600 0.125 4370
700 0.146 5100
800 0.167 5830
900 0.188 6550
1000 0.208 7280
2000 0.417 1.46 × 104
3000 0.625 2.18 × 104
4000 0.834 2.91 × 104
5000 1.04 3.64 × 104
6000 1.25 4.37 × 104
7000 1.46 5.10 × 104
8000 1.67 5.83 × 104
9000 1.88 6.55 × 104
1.00 × 104 2.08 7.28 × 104
2.00 × 104 4.17 1.46 × 105
3.00 × 104 6.25 2.18 × 105
4.00 × 104 8.34 2.91 × 105
4.08 × 104 8.50 2.97 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.0294 713
70.0 0.0303 734
80.0 0.0346 839
90.0 0.0389 944
100 0.0432 1050
200 0.0864 2100
300 0.130 3150
400 0.173 4190
500 0.216 5240
600 0.259 6290
700 0.303 7340
800 0.346 8390
900 0.389 9440
1000 0.432 1.05 × 104
2000 0.864 2.10 × 104
3000 1.30 3.15 × 104
4000 1.73 4.19 × 104
5000 2.16 5.24 × 104
6000 2.59 6.29 × 104
7000 3.03 7.34 × 104
8000 3.46 8.39 × 104
9000 3.89 9.44 × 104
1.00 × 104 4.32 1.05 × 105
2.00 × 104 8.64 2.10 × 105
2.83 × 104 12.2 2.97 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.0929 1270
70.0 0.0956 1300
80.0 0.109 1490
90.0 0.123 1680
100 0.137 1860
200 0.273 3730
300 0.410 5590
400 0.546 7460
500 0.683 9320
600 0.820 1.12 × 104
700 0.956 1.30 × 104
800 1.09 1.49 × 104
900 1.23 1.68 × 104
1000 1.37 1.86 × 104
2000 2.73 3.73 × 104
3000 4.10 5.59 × 104
4000 5.46 7.46 × 104
5000 6.83 9.32 × 104
6000 8.20 1.12 × 105
7000 9.56 1.30 × 105
8000 10.9 1.49 × 105
9000 12.3 1.68 × 105
1.00 × 104 13.7 1.86 × 105
1.59 × 104 21.8 2.97 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.227 1980
70.0 0.233 2040
80.0 0.267 2330
90.0 0.300 2620
100 0.333 2910
200 0.667 5830
300 1.00 8740
400 1.33 1.17 × 104
500 1.67 1.46 × 104
600 2.00 1.75 × 104
700 2.33 2.04 × 104
800 2.67 2.33 × 104
900 3.00 2.62 × 104
1000 3.33 2.91 × 104
2000 6.67 5.83 × 104
3000 10.0 8.74 × 104
4000 13.3 1.17 × 105
4210 14.0 1.23 × 105
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.470 2850
70.0 0.484 2940
80.0 0.553 3360
90.0 0.622 3780
100 0.692 4190
200 1.38 8390
300 2.07 1.26 × 104
400 2.77 1.68 × 104
500 3.46 2.10 × 104
600 4.15 2.52 × 104
700 4.84 2.94 × 104
800 5.53 3.36 × 104
900 6.22 3.78 × 104
1000 6.92 4.19 × 104
2000 13.8 8.39 × 104
2030 14.0 8.52 × 104
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 0.871 3880
70.0 0.897 4000
80.0 1.02 4570
90.0 1.15 5140
100 1.28 5710
200 2.56 1.14 × 104
300 3.84 1.71 × 104
400 5.12 2.28 × 104
500 6.41 2.85 × 104
600 7.69 3.43 × 104
700 8.97 4.00 × 104
800 10.2 4.57 × 104
900 11.5 5.14 × 104
1000 12.8 5.71 × 104
1100 14.0 6.26 × 104
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 1.49 5070
70.0 1.53 5220
80.0 1.75 5970
90.0 1.97 6710
100 2.19 7460
200 4.37 1.49 × 104
300 6.56 2.24 × 104
400 8.74 2.98 × 104
500 10.9 3.73 × 104
600 13.1 4.47 × 104
642 14.0 4.79 × 104
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 2.38 6420
70.0 2.45 6610
80.0 2.80 7550
90.0 3.15 8490
100 3.50 9440
200 7.00 1.89 × 104
300 10.5 2.83 × 104
400 14.0 3.78 × 104
401 14.0 3.78 × 104
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 3.63 7920
70.0 3.74 8160
80.0 4.27 9320
90.0 4.80 1.05 × 104
100 5.34 1.17 × 104
200 10.7 2.33 × 104
263 14.0 3.07 × 104
Steel I Beam: W14 × 68 (Wide Flange 14 inch tall × 68 lbf/ft)
L = 125 ft
P (lbf/ft) w_max (in) stress_max (psi)
68.0 8.86 1.24 × 104
70.0 9.12 1.27 × 104
80.0 10.4 1.46 × 104
90.0 11.7 1.64 × 104
100 13.0 1.82 × 104
108 14.0 1.96 × 104
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