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Wide Flange Steel I Beam: W14 × 34
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four 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 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 = 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 2.90 × 10-6 8.09
40.0 3.41 × 10-6 9.51
50.0 4.26 × 10-6 11.9
60.0 5.11 × 10-6 14.3
70.0 5.96 × 10-6 16.6
80.0 6.81 × 10-6 19.0
90.0 7.66 × 10-6 21.4
100 8.52 × 10-6 23.8
200 1.70 × 10-5 47.6
300 2.55 × 10-5 71.3
400 3.41 × 10-5 95.1
500 4.26 × 10-5 119
600 5.11 × 10-5 143
700 5.96 × 10-5 166
800 6.81 × 10-5 190
900 7.66 × 10-5 214
1000 8.52 × 10-5 238
2000 1.70 × 10-4 476
3000 2.55 × 10-4 713
4000 3.41 × 10-4 951
5000 4.26 × 10-4 1190
6000 5.11 × 10-4 1430
7000 5.96 × 10-4 1660
8000 6.81 × 10-4 1900
9000 7.66 × 10-4 2140
1.00 × 104 8.52 × 10-4 2380
2.00 × 104 0.00170 4760
3.00 × 104 0.00255 7130
4.00 × 104 0.00341 9510
5.00 × 104 0.00426 1.19 × 104
6.00 × 104 0.00511 1.43 × 104
7.00 × 104 0.00596 1.66 × 104
8.00 × 104 0.00681 1.90 × 104
9.00 × 104 0.00766 2.14 × 104
1.00 × 105 0.00852 2.38 × 104
2.00 × 105 0.0170 4.76 × 104
3.00 × 105 0.0255 7.13 × 104
4.00 × 105 0.0341 9.51 × 104
5.00 × 105 0.0426 1.19 × 105
6.00 × 105 0.0511 1.43 × 105
7.00 × 105 0.0596 1.66 × 105
8.00 × 105 0.0681 1.90 × 105
9.00 × 105 0.0766 2.14 × 105
1.00 × 106 0.0852 2.38 × 105
1.25 × 106 0.106 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 2.23 × 10-5 22.5
40.0 2.63 × 10-5 26.4
50.0 3.29 × 10-5 33.0
60.0 3.94 × 10-5 39.6
70.0 4.60 × 10-5 46.2
80.0 5.26 × 10-5 52.8
90.0 5.91 × 10-5 59.4
100 6.57 × 10-5 66.1
200 1.31 × 10-4 132
300 1.97 × 10-4 198
400 2.63 × 10-4 264
500 3.29 × 10-4 330
600 3.94 × 10-4 396
700 4.60 × 10-4 462
800 5.26 × 10-4 528
900 5.91 × 10-4 594
1000 6.57 × 10-4 661
2000 0.00131 1320
3000 0.00197 1980
4000 0.00263 2640
5000 0.00329 3300
6000 0.00394 3960
7000 0.00460 4620
8000 0.00526 5280
9000 0.00591 5940
1.00 × 104 0.00657 6610
2.00 × 104 0.0131 1.32 × 104
3.00 × 104 0.0197 1.98 × 104
4.00 × 104 0.0263 2.64 × 104
5.00 × 104 0.0329 3.30 × 104
6.00 × 104 0.0394 3.96 × 104
7.00 × 104 0.0460 4.62 × 104
8.00 × 104 0.0526 5.28 × 104
9.00 × 104 0.0591 5.94 × 104
1.00 × 105 0.0657 6.61 × 104
2.00 × 105 0.131 1.32 × 105
3.00 × 105 0.197 1.98 × 105
4.00 × 105 0.263 2.64 × 105
4.50 × 105 0.295 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 3.57 × 10-4 89.8
40.0 4.20 × 10-4 106
50.0 5.26 × 10-4 132
60.0 6.31 × 10-4 159
70.0 7.36 × 10-4 185
80.0 8.41 × 10-4 211
90.0 9.46 × 10-4 238
100 0.00105 264
200 0.00210 528
300 0.00315 793
400 0.00420 1060
500 0.00526 1320
600 0.00631 1590
700 0.00736 1850
800 0.00841 2110
900 0.00946 2380
1000 0.0105 2640
2000 0.0210 5280
3000 0.0315 7930
4000 0.0420 1.06 × 104
5000 0.0526 1.32 × 104
6000 0.0631 1.59 × 104
7000 0.0736 1.85 × 104
8000 0.0841 2.11 × 104
9000 0.0946 2.38 × 104
1.00 × 104 0.105 2.64 × 104
2.00 × 104 0.210 5.28 × 104
3.00 × 104 0.315 7.93 × 104
4.00 × 104 0.420 1.06 × 105
5.00 × 104 0.526 1.32 × 105
6.00 × 104 0.631 1.59 × 105
7.00 × 104 0.736 1.85 × 105
8.00 × 104 0.841 2.11 × 105
9.00 × 104 0.946 2.38 × 105
1.00 × 105 1.05 2.64 × 105
1.12 × 105 1.18 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 0.00181 202
40.0 0.00213 238
50.0 0.00266 297
60.0 0.00319 357
70.0 0.00373 416
80.0 0.00426 476
90.0 0.00479 535
100 0.00532 594
200 0.0106 1190
300 0.0160 1780
400 0.0213 2380
500 0.0266 2970
600 0.0319 3570
700 0.0373 4160
800 0.0426 4760
900 0.0479 5350
1000 0.0532 5940
2000 0.106 1.19 × 104
3000 0.160 1.78 × 104
4000 0.213 2.38 × 104
5000 0.266 2.97 × 104
6000 0.319 3.57 × 104
7000 0.373 4.16 × 104
8000 0.426 4.76 × 104
9000 0.479 5.35 × 104
1.00 × 104 0.532 5.94 × 104
2.00 × 104 1.06 1.19 × 105
3.00 × 104 1.60 1.78 × 105
4.00 × 104 2.13 2.38 × 105
5.00 × 104 2.66 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 0.00572 359
40.0 0.00673 423
50.0 0.00841 528
60.0 0.0101 634
70.0 0.0118 740
80.0 0.0135 846
90.0 0.0151 951
100 0.0168 1060
200 0.0336 2110
300 0.0505 3170
400 0.0673 4230
500 0.0841 5280
600 0.101 6340
700 0.118 7400
800 0.135 8460
900 0.151 9510
1000 0.168 1.06 × 104
2000 0.336 2.11 × 104
3000 0.505 3.17 × 104
4000 0.673 4.23 × 104
5000 0.841 5.28 × 104
6000 1.01 6.34 × 104
7000 1.18 7.40 × 104
8000 1.35 8.46 × 104
9000 1.51 9.51 × 104
1.00 × 104 1.68 1.06 × 105
2.00 × 104 3.36 2.11 × 105
2.81 × 104 4.73 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 0.0140 561
40.0 0.0164 661
50.0 0.0205 826
60.0 0.0246 991
70.0 0.0287 1160
80.0 0.0329 1320
90.0 0.0370 1490
100 0.0411 1650
200 0.0821 3300
300 0.123 4950
400 0.164 6610
500 0.205 8260
600 0.246 9910
700 0.287 1.16 × 104
800 0.329 1.32 × 104
900 0.370 1.49 × 104
1000 0.411 1.65 × 104
2000 0.821 3.30 × 104
3000 1.23 4.95 × 104
4000 1.64 6.61 × 104
5000 2.05 8.26 × 104
6000 2.46 9.91 × 104
7000 2.87 1.16 × 105
8000 3.29 1.32 × 105
9000 3.70 1.49 × 105
1.00 × 104 4.11 1.65 × 105
1.80 × 104 7.39 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 0.0290 809
40.0 0.0341 951
50.0 0.0426 1190
60.0 0.0511 1430
70.0 0.0596 1660
80.0 0.0681 1900
90.0 0.0766 2140
100 0.0852 2380
200 0.170 4760
300 0.255 7130
400 0.341 9510
500 0.426 1.19 × 104
600 0.511 1.43 × 104
700 0.596 1.66 × 104
800 0.681 1.90 × 104
900 0.766 2.14 × 104
1000 0.852 2.38 × 104
2000 1.70 4.76 × 104
3000 2.55 7.13 × 104
4000 3.41 9.51 × 104
5000 4.26 1.19 × 105
6000 5.11 1.43 × 105
7000 5.96 1.66 × 105
8000 6.81 1.90 × 105
9000 7.66 2.14 × 105
1.00 × 104 8.52 2.38 × 105
1.25 × 104 10.6 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 0.0915 1440
40.0 0.108 1690
50.0 0.135 2110
60.0 0.161 2540
70.0 0.188 2960
80.0 0.215 3380
90.0 0.242 3800
100 0.269 4230
200 0.538 8460
300 0.807 1.27 × 104
400 1.08 1.69 × 104
500 1.35 2.11 × 104
600 1.61 2.54 × 104
700 1.88 2.96 × 104
800 2.15 3.38 × 104
900 2.42 3.80 × 104
1000 2.69 4.23 × 104
2000 5.38 8.46 × 104
3000 8.07 1.27 × 105
4000 10.8 1.69 × 105
5000 13.5 2.11 × 105
5190 14.0 2.20 × 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 0.223 2250
40.0 0.263 2640
50.0 0.329 3300
60.0 0.394 3960
70.0 0.460 4620
80.0 0.526 5280
90.0 0.591 5940
100 0.657 6610
200 1.31 1.32 × 104
300 1.97 1.98 × 104
400 2.63 2.64 × 104
500 3.29 3.30 × 104
600 3.94 3.96 × 104
700 4.60 4.62 × 104
800 5.26 5.28 × 104
900 5.91 5.94 × 104
1000 6.57 6.61 × 104
2000 13.1 1.32 × 105
2130 14.0 1.41 × 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 0.463 3230
40.0 0.545 3800
50.0 0.681 4760
60.0 0.817 5710
70.0 0.954 6660
80.0 1.09 7610
90.0 1.23 8560
100 1.36 9510
200 2.72 1.90 × 104
300 4.09 2.85 × 104
400 5.45 3.80 × 104
500 6.81 4.76 × 104
600 8.17 5.71 × 104
700 9.54 6.66 × 104
800 10.9 7.61 × 104
900 12.3 8.56 × 104
1000 13.6 9.51 × 104
1030 14.0 9.76 × 104
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 0.858 4400
40.0 1.01 5180
50.0 1.26 6470
60.0 1.51 7770
70.0 1.77 9060
80.0 2.02 1.04 × 104
90.0 2.27 1.17 × 104
100 2.52 1.29 × 104
200 5.05 2.59 × 104
300 7.57 3.88 × 104
400 10.1 5.18 × 104
500 12.6 6.47 × 104
554 14.0 7.17 × 104
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 1.46 5750
40.0 1.72 6760
50.0 2.15 8460
60.0 2.58 1.01 × 104
70.0 3.01 1.18 × 104
80.0 3.44 1.35 × 104
90.0 3.88 1.52 × 104
100 4.31 1.69 × 104
200 8.61 3.38 × 104
300 12.9 5.07 × 104
325 14.0 5.49 × 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 2.35 7280
40.0 2.76 8560
50.0 3.45 1.07 × 104
60.0 4.14 1.28 × 104
70.0 4.83 1.50 × 104
80.0 5.52 1.71 × 104
90.0 6.21 1.93 × 104
100 6.90 2.14 × 104
200 13.8 4.28 × 104
203 14.0 4.34 × 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 3.57 8980
40.0 4.20 1.06 × 104
50.0 5.26 1.32 × 104
60.0 6.31 1.59 × 104
70.0 7.36 1.85 × 104
80.0 8.41 2.11 × 104
90.0 9.46 2.38 × 104
100 10.5 2.64 × 104
133 14.0 3.51 × 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 8.73 1.40 × 104
40.0 10.3 1.65 × 104
50.0 12.8 2.06 × 104
54.5 14.0 2.25 × 104
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