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Wide Flange Steel I Beam: W14 × 34
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W14 × 34
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 = 340 in4) for the W14 × 34 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 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 2.39 × 10-6 9.44
40.0 2.82 × 10-6 11.1
50.0 3.52 × 10-6 13.9
60.0 4.22 × 10-6 16.7
70.0 4.93 × 10-6 19.4
80.0 5.63 × 10-6 22.2
90.0 6.34 × 10-6 25.0
100 7.04 × 10-6 27.8
200 1.41 × 10-5 55.5
300 2.11 × 10-5 83.3
400 2.82 × 10-5 111
500 3.52 × 10-5 139
600 4.22 × 10-5 167
700 4.93 × 10-5 194
800 5.63 × 10-5 222
900 6.34 × 10-5 250
1000 7.04 × 10-5 278
2000 1.41 × 10-4 555
3000 2.11 × 10-4 833
4000 2.82 × 10-4 1110
5000 3.52 × 10-4 1390
6000 4.22 × 10-4 1670
7000 4.93 × 10-4 1940
8000 5.63 × 10-4 2220
9000 6.34 × 10-4 2500
1.00 × 104 7.04 × 10-4 2780
2.00 × 104 0.00141 5550
3.00 × 104 0.00211 8330
4.00 × 104 0.00282 1.11 × 104
5.00 × 104 0.00352 1.39 × 104
6.00 × 104 0.00422 1.67 × 104
7.00 × 104 0.00493 1.94 × 104
8.00 × 104 0.00563 2.22 × 104
9.00 × 104 0.00634 2.50 × 104
1.00 × 105 0.00704 2.78 × 104
2.00 × 105 0.0141 5.55 × 104
3.00 × 105 0.0211 8.33 × 104
4.00 × 105 0.0282 1.11 × 105
5.00 × 105 0.0352 1.39 × 105
6.00 × 105 0.0422 1.67 × 105
7.00 × 105 0.0493 1.94 × 105
8.00 × 105 0.0563 2.22 × 105
9.00 × 105 0.0634 2.50 × 105
1.00 × 106 0.0704 2.78 × 105
1.07 × 106 0.0753 2.97 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 1.85 × 10-5 26.2
40.0 2.17 × 10-5 30.8
50.0 2.72 × 10-5 38.5
60.0 3.26 × 10-5 46.3
70.0 3.80 × 10-5 54.0
80.0 4.35 × 10-5 61.7
90.0 4.89 × 10-5 69.4
100 5.43 × 10-5 77.1
200 1.09 × 10-4 154
300 1.63 × 10-4 231
400 2.17 × 10-4 308
500 2.72 × 10-4 385
600 3.26 × 10-4 463
700 3.80 × 10-4 540
800 4.35 × 10-4 617
900 4.89 × 10-4 694
1000 5.43 × 10-4 771
2000 0.00109 1540
3000 0.00163 2310
4000 0.00217 3080
5000 0.00272 3850
6000 0.00326 4630
7000 0.00380 5400
8000 0.00435 6170
9000 0.00489 6940
1.00 × 104 0.00543 7710
2.00 × 104 0.0109 1.54 × 104
3.00 × 104 0.0163 2.31 × 104
4.00 × 104 0.0217 3.08 × 104
5.00 × 104 0.0272 3.85 × 104
6.00 × 104 0.0326 4.63 × 104
7.00 × 104 0.0380 5.40 × 104
8.00 × 104 0.0435 6.17 × 104
9.00 × 104 0.0489 6.94 × 104
1.00 × 105 0.0543 7.71 × 104
2.00 × 105 0.109 1.54 × 105
3.00 × 105 0.163 2.31 × 105
3.85 × 105 0.209 2.97 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 2.95 × 10-4 105
40.0 3.48 × 10-4 123
50.0 4.35 × 10-4 154
60.0 5.21 × 10-4 185
70.0 6.08 × 10-4 216
80.0 6.95 × 10-4 247
90.0 7.82 × 10-4 278
100 8.69 × 10-4 308
200 0.00174 617
300 0.00261 925
400 0.00348 1230
500 0.00435 1540
600 0.00521 1850
700 0.00608 2160
800 0.00695 2470
900 0.00782 2780
1000 0.00869 3080
2000 0.0174 6170
3000 0.0261 9250
4000 0.0348 1.23 × 104
5000 0.0435 1.54 × 104
6000 0.0521 1.85 × 104
7000 0.0608 2.16 × 104
8000 0.0695 2.47 × 104
9000 0.0782 2.78 × 104
1.00 × 104 0.0869 3.08 × 104
2.00 × 104 0.174 6.17 × 104
3.00 × 104 0.261 9.25 × 104
4.00 × 104 0.348 1.23 × 105
5.00 × 104 0.435 1.54 × 105
6.00 × 104 0.521 1.85 × 105
7.00 × 104 0.608 2.16 × 105
8.00 × 104 0.695 2.47 × 105
9.00 × 104 0.782 2.78 × 105
9.63 × 104 0.837 2.97 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 0.00150 236
40.0 0.00176 278
50.0 0.00220 347
60.0 0.00264 416
70.0 0.00308 486
80.0 0.00352 555
90.0 0.00396 624
100 0.00440 694
200 0.00880 1390
300 0.0132 2080
400 0.0176 2780
500 0.0220 3470
600 0.0264 4160
700 0.0308 4860
800 0.0352 5550
900 0.0396 6240
1000 0.0440 6940
2000 0.0880 1.39 × 104
3000 0.132 2.08 × 104
4000 0.176 2.78 × 104
5000 0.220 3.47 × 104
6000 0.264 4.16 × 104
7000 0.308 4.86 × 104
8000 0.352 5.55 × 104
9000 0.396 6.24 × 104
1.00 × 104 0.440 6.94 × 104
2.00 × 104 0.880 1.39 × 105
3.00 × 104 1.32 2.08 × 105
4.00 × 104 1.76 2.78 × 105
4.28 × 104 1.88 2.97 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 0.00473 419
40.0 0.00556 493
50.0 0.00695 617
60.0 0.00834 740
70.0 0.00973 863
80.0 0.0111 987
90.0 0.0125 1110
100 0.0139 1230
200 0.0278 2470
300 0.0417 3700
400 0.0556 4930
500 0.0695 6170
600 0.0834 7400
700 0.0973 8630
800 0.111 9870
900 0.125 1.11 × 104
1000 0.139 1.23 × 104
2000 0.278 2.47 × 104
3000 0.417 3.70 × 104
4000 0.556 4.93 × 104
5000 0.695 6.17 × 104
6000 0.834 7.40 × 104
7000 0.973 8.63 × 104
8000 1.11 9.87 × 104
9000 1.25 1.11 × 105
1.00 × 104 1.39 1.23 × 105
2.00 × 104 2.78 2.47 × 105
2.41 × 104 3.35 2.97 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 0.0115 655
40.0 0.0136 771
50.0 0.0170 964
60.0 0.0204 1160
70.0 0.0238 1350
80.0 0.0272 1540
90.0 0.0306 1730
100 0.0339 1930
200 0.0679 3850
300 0.102 5780
400 0.136 7710
500 0.170 9640
600 0.204 1.16 × 104
700 0.238 1.35 × 104
800 0.272 1.54 × 104
900 0.306 1.73 × 104
1000 0.339 1.93 × 104
2000 0.679 3.85 × 104
3000 1.02 5.78 × 104
4000 1.36 7.71 × 104
5000 1.70 9.64 × 104
6000 2.04 1.16 × 105
7000 2.38 1.35 × 105
8000 2.72 1.54 × 105
9000 3.06 1.73 × 105
1.00 × 104 3.39 1.93 × 105
1.54 × 104 5.23 2.97 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 0.0239 944
40.0 0.0282 1110
50.0 0.0352 1390
60.0 0.0422 1670
70.0 0.0493 1940
80.0 0.0563 2220
90.0 0.0634 2500
100 0.0704 2780
200 0.141 5550
300 0.211 8330
400 0.282 1.11 × 104
500 0.352 1.39 × 104
600 0.422 1.67 × 104
700 0.493 1.94 × 104
800 0.563 2.22 × 104
900 0.634 2.50 × 104
1000 0.704 2.78 × 104
2000 1.41 5.55 × 104
3000 2.11 8.33 × 104
4000 2.82 1.11 × 105
5000 3.52 1.39 × 105
6000 4.22 1.67 × 105
7000 4.93 1.94 × 105
8000 5.63 2.22 × 105
9000 6.34 2.50 × 105
1.00 × 104 7.04 2.78 × 105
1.07 × 104 7.53 2.97 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 0.0756 1680
40.0 0.0890 1970
50.0 0.111 2470
60.0 0.133 2960
70.0 0.156 3450
80.0 0.178 3950
90.0 0.200 4440
100 0.222 4930
200 0.445 9870
300 0.667 1.48 × 104
400 0.890 1.97 × 104
500 1.11 2.47 × 104
600 1.33 2.96 × 104
700 1.56 3.45 × 104
800 1.78 3.95 × 104
900 2.00 4.44 × 104
1000 2.22 4.93 × 104
2000 4.45 9.87 × 104
3000 6.67 1.48 × 105
4000 8.90 1.97 × 105
5000 11.1 2.47 × 105
6000 13.3 2.96 × 105
6020 13.4 2.97 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 0.185 2620
40.0 0.217 3080
50.0 0.272 3850
60.0 0.326 4630
70.0 0.380 5400
80.0 0.435 6170
90.0 0.489 6940
100 0.543 7710
200 1.09 1.54 × 104
300 1.63 2.31 × 104
400 2.17 3.08 × 104
500 2.72 3.85 × 104
600 3.26 4.63 × 104
700 3.80 5.40 × 104
800 4.35 6.17 × 104
900 4.89 6.94 × 104
1000 5.43 7.71 × 104
2000 10.9 1.54 × 105
2570 14.0 1.98 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 0.383 3770
40.0 0.451 4440
50.0 0.563 5550
60.0 0.676 6660
70.0 0.788 7770
80.0 0.901 8880
90.0 1.01 9990
100 1.13 1.11 × 104
200 2.25 2.22 × 104
300 3.38 3.33 × 104
400 4.51 4.44 × 104
500 5.63 5.55 × 104
600 6.76 6.66 × 104
700 7.88 7.77 × 104
800 9.01 8.88 × 104
900 10.1 9.99 × 104
1000 11.3 1.11 × 105
1240 14.0 1.38 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 0.709 5140
40.0 0.835 6040
50.0 1.04 7560
60.0 1.25 9070
70.0 1.46 1.06 × 104
80.0 1.67 1.21 × 104
90.0 1.88 1.36 × 104
100 2.09 1.51 × 104
200 4.17 3.02 × 104
300 6.26 4.53 × 104
400 8.35 6.04 × 104
500 10.4 7.56 × 104
600 12.5 9.07 × 104
670 14.0 1.01 × 105
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 1.21 6710
40.0 1.42 7890
50.0 1.78 9870
60.0 2.14 1.18 × 104
70.0 2.49 1.38 × 104
80.0 2.85 1.58 × 104
90.0 3.20 1.78 × 104
100 3.56 1.97 × 104
200 7.12 3.95 × 104
300 10.7 5.92 × 104
393 14.0 7.75 × 104
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 1.94 8490
40.0 2.28 9990
50.0 2.85 1.25 × 104
60.0 3.42 1.50 × 104
70.0 3.99 1.75 × 104
80.0 4.56 2.00 × 104
90.0 5.13 2.25 × 104
100 5.70 2.50 × 104
200 11.4 5.00 × 104
245 14.0 6.12 × 104
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 2.95 1.05 × 104
40.0 3.48 1.23 × 104
50.0 4.35 1.54 × 104
60.0 5.21 1.85 × 104
70.0 6.08 2.16 × 104
80.0 6.95 2.47 × 104
90.0 7.82 2.78 × 104
100 8.69 3.08 × 104
161 14.0 4.96 × 104
Steel I Beam: W14 × 34 (Wide Flange 14 inch tall × 34 lbf/ft)
L = 125 ft
P (lbf/ft) w_max (in) stress_max (psi)
34.0 7.21 1.64 × 104
40.0 8.49 1.93 × 104
50.0 10.6 2.41 × 104
60.0 12.7 2.89 × 104
65.9 14.0 3.17 × 104
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