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Wide Flange Steel I Beam: W14 × 34
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three 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 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 = 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 3.12 × 10-6 7.55
40.0 3.68 × 10-6 8.88
50.0 4.60 × 10-6 11.1
60.0 5.51 × 10-6 13.3
70.0 6.43 × 10-6 15.5
80.0 7.35 × 10-6 17.8
90.0 8.27 × 10-6 20.0
100 9.19 × 10-6 22.2
200 1.84 × 10-5 44.4
300 2.76 × 10-5 66.6
400 3.68 × 10-5 88.8
500 4.60 × 10-5 111
600 5.51 × 10-5 133
700 6.43 × 10-5 155
800 7.35 × 10-5 178
900 8.27 × 10-5 200
1000 9.19 × 10-5 222
2000 1.84 × 10-4 444
3000 2.76 × 10-4 666
4000 3.68 × 10-4 888
5000 4.60 × 10-4 1110
6000 5.51 × 10-4 1330
7000 6.43 × 10-4 1550
8000 7.35 × 10-4 1780
9000 8.27 × 10-4 2000
1.00 × 104 9.19 × 10-4 2220
2.00 × 104 0.00184 4440
3.00 × 104 0.00276 6660
4.00 × 104 0.00368 8880
5.00 × 104 0.00460 1.11 × 104
6.00 × 104 0.00551 1.33 × 104
7.00 × 104 0.00643 1.55 × 104
8.00 × 104 0.00735 1.78 × 104
9.00 × 104 0.00827 2.00 × 104
1.00 × 105 0.00919 2.22 × 104
2.00 × 105 0.0184 4.44 × 104
3.00 × 105 0.0276 6.66 × 104
4.00 × 105 0.0368 8.88 × 104
5.00 × 105 0.0460 1.11 × 105
6.00 × 105 0.0551 1.33 × 105
7.00 × 105 0.0643 1.55 × 105
8.00 × 105 0.0735 1.78 × 105
9.00 × 105 0.0827 2.00 × 105
1.00 × 106 0.0919 2.22 × 105
1.34 × 106 0.123 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 2.41 × 10-5 21.0
40.0 2.84 × 10-5 24.7
50.0 3.55 × 10-5 30.8
60.0 4.26 × 10-5 37.0
70.0 4.96 × 10-5 43.2
80.0 5.67 × 10-5 49.3
90.0 6.38 × 10-5 55.5
100 7.09 × 10-5 61.7
200 1.42 × 10-4 123
300 2.13 × 10-4 185
400 2.84 × 10-4 247
500 3.55 × 10-4 308
600 4.26 × 10-4 370
700 4.96 × 10-4 432
800 5.67 × 10-4 493
900 6.38 × 10-4 555
1000 7.09 × 10-4 617
2000 0.00142 1230
3000 0.00213 1850
4000 0.00284 2470
5000 0.00355 3080
6000 0.00426 3700
7000 0.00496 4320
8000 0.00567 4930
9000 0.00638 5550
1.00 × 104 0.00709 6170
2.00 × 104 0.0142 1.23 × 104
3.00 × 104 0.0213 1.85 × 104
4.00 × 104 0.0284 2.47 × 104
5.00 × 104 0.0355 3.08 × 104
6.00 × 104 0.0426 3.70 × 104
7.00 × 104 0.0496 4.32 × 104
8.00 × 104 0.0567 4.93 × 104
9.00 × 104 0.0638 5.55 × 104
1.00 × 105 0.0709 6.17 × 104
2.00 × 105 0.142 1.23 × 105
3.00 × 105 0.213 1.85 × 105
4.00 × 105 0.284 2.47 × 105
4.82 × 105 0.342 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 3.86 × 10-4 83.9
40.0 4.54 × 10-4 98.7
50.0 5.67 × 10-4 123
60.0 6.81 × 10-4 148
70.0 7.94 × 10-4 173
80.0 9.08 × 10-4 197
90.0 0.00102 222
100 0.00113 247
200 0.00227 493
300 0.00340 740
400 0.00454 987
500 0.00567 1230
600 0.00681 1480
700 0.00794 1730
800 0.00908 1970
900 0.0102 2220
1000 0.0113 2470
2000 0.0227 4930
3000 0.0340 7400
4000 0.0454 9870
5000 0.0567 1.23 × 104
6000 0.0681 1.48 × 104
7000 0.0794 1.73 × 104
8000 0.0908 1.97 × 104
9000 0.102 2.22 × 104
1.00 × 104 0.113 2.47 × 104
2.00 × 104 0.227 4.93 × 104
3.00 × 104 0.340 7.40 × 104
4.00 × 104 0.454 9.87 × 104
5.00 × 104 0.567 1.23 × 105
6.00 × 104 0.681 1.48 × 105
7.00 × 104 0.794 1.73 × 105
8.00 × 104 0.908 1.97 × 105
9.00 × 104 1.02 2.22 × 105
1.00 × 105 1.13 2.47 × 105
1.20 × 105 1.37 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 0.00195 189
40.0 0.00230 222
50.0 0.00287 278
60.0 0.00345 333
70.0 0.00402 389
80.0 0.00460 444
90.0 0.00517 500
100 0.00574 555
200 0.0115 1110
300 0.0172 1670
400 0.0230 2220
500 0.0287 2780
600 0.0345 3330
700 0.0402 3890
800 0.0460 4440
900 0.0517 5000
1000 0.0574 5550
2000 0.115 1.11 × 104
3000 0.172 1.67 × 104
4000 0.230 2.22 × 104
5000 0.287 2.78 × 104
6000 0.345 3.33 × 104
7000 0.402 3.89 × 104
8000 0.460 4.44 × 104
9000 0.517 5.00 × 104
1.00 × 104 0.574 5.55 × 104
2.00 × 104 1.15 1.11 × 105
3.00 × 104 1.72 1.67 × 105
4.00 × 104 2.30 2.22 × 105
5.00 × 104 2.87 2.78 × 105
5.35 × 104 3.07 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 0.00617 336
40.0 0.00726 395
50.0 0.00908 493
60.0 0.0109 592
70.0 0.0127 691
80.0 0.0145 789
90.0 0.0163 888
100 0.0182 987
200 0.0363 1970
300 0.0545 2960
400 0.0726 3950
500 0.0908 4930
600 0.109 5920
700 0.127 6910
800 0.145 7890
900 0.163 8880
1000 0.182 9870
2000 0.363 1.97 × 104
3000 0.545 2.96 × 104
4000 0.726 3.95 × 104
5000 0.908 4.93 × 104
6000 1.09 5.92 × 104
7000 1.27 6.91 × 104
8000 1.45 7.89 × 104
9000 1.63 8.88 × 104
1.00 × 104 1.82 9.87 × 104
2.00 × 104 3.63 1.97 × 105
3.00 × 104 5.45 2.96 × 105
3.01 × 104 5.46 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 0.0151 524
40.0 0.0177 617
50.0 0.0222 771
60.0 0.0266 925
70.0 0.0310 1080
80.0 0.0355 1230
90.0 0.0399 1390
100 0.0443 1540
200 0.0886 3080
300 0.133 4630
400 0.177 6170
500 0.222 7710
600 0.266 9250
700 0.310 1.08 × 104
800 0.355 1.23 × 104
900 0.399 1.39 × 104
1000 0.443 1.54 × 104
2000 0.886 3.08 × 104
3000 1.33 4.63 × 104
4000 1.77 6.17 × 104
5000 2.22 7.71 × 104
6000 2.66 9.25 × 104
7000 3.10 1.08 × 105
8000 3.55 1.23 × 105
9000 3.99 1.39 × 105
1.00 × 104 4.43 1.54 × 105
1.93 × 104 8.54 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 0.0312 755
40.0 0.0368 888
50.0 0.0460 1110
60.0 0.0551 1330
70.0 0.0643 1550
80.0 0.0735 1780
90.0 0.0827 2000
100 0.0919 2220
200 0.184 4440
300 0.276 6660
400 0.368 8880
500 0.460 1.11 × 104
600 0.551 1.33 × 104
700 0.643 1.55 × 104
800 0.735 1.78 × 104
900 0.827 2.00 × 104
1000 0.919 2.22 × 104
2000 1.84 4.44 × 104
3000 2.76 6.66 × 104
4000 3.68 8.88 × 104
5000 4.60 1.11 × 105
6000 5.51 1.33 × 105
7000 6.43 1.55 × 105
8000 7.35 1.78 × 105
9000 8.27 2.00 × 105
1.00 × 104 9.19 2.22 × 105
1.34 × 104 12.3 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 0.0988 1340
40.0 0.116 1580
50.0 0.145 1970
60.0 0.174 2370
70.0 0.203 2760
80.0 0.232 3160
90.0 0.261 3550
100 0.290 3950
200 0.581 7890
300 0.871 1.18 × 104
400 1.16 1.58 × 104
500 1.45 1.97 × 104
600 1.74 2.37 × 104
700 2.03 2.76 × 104
800 2.32 3.16 × 104
900 2.61 3.55 × 104
1000 2.90 3.95 × 104
2000 5.81 7.89 × 104
3000 8.71 1.18 × 105
4000 11.6 1.58 × 105
4810 14.0 1.90 × 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 0.241 2100
40.0 0.284 2470
50.0 0.355 3080
60.0 0.426 3700
70.0 0.496 4320
80.0 0.567 4930
90.0 0.638 5550
100 0.709 6170
200 1.42 1.23 × 104
300 2.13 1.85 × 104
400 2.84 2.47 × 104
500 3.55 3.08 × 104
600 4.26 3.70 × 104
700 4.96 4.32 × 104
800 5.67 4.93 × 104
900 6.38 5.55 × 104
1000 7.09 6.17 × 104
1970 14.0 1.22 × 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 0.500 3020
40.0 0.588 3550
50.0 0.735 4440
60.0 0.882 5330
70.0 1.03 6220
80.0 1.18 7110
90.0 1.32 7990
100 1.47 8880
200 2.94 1.78 × 104
300 4.41 2.66 × 104
400 5.88 3.55 × 104
500 7.35 4.44 × 104
600 8.82 5.33 × 104
700 10.3 6.22 × 104
800 11.8 7.11 × 104
900 13.2 7.99 × 104
951 14.0 8.44 × 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 0.926 4110
40.0 1.09 4840
50.0 1.36 6040
60.0 1.63 7250
70.0 1.91 8460
80.0 2.18 9670
90.0 2.45 1.09 × 104
100 2.72 1.21 × 104
200 5.45 2.42 × 104
300 8.17 3.63 × 104
400 10.9 4.84 × 104
500 13.6 6.04 × 104
513 14.0 6.20 × 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 1.58 5370
40.0 1.86 6320
50.0 2.32 7890
60.0 2.79 9470
70.0 3.25 1.11 × 104
80.0 3.72 1.26 × 104
90.0 4.18 1.42 × 104
100 4.65 1.58 × 104
200 9.30 3.16 × 104
300 13.9 4.74 × 104
301 14.0 4.75 × 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 2.53 6790
40.0 2.98 7990
50.0 3.72 9990
60.0 4.47 1.20 × 104
70.0 5.21 1.40 × 104
80.0 5.96 1.60 × 104
90.0 6.70 1.80 × 104
100 7.44 2.00 × 104
188 14.0 3.75 × 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 3.86 8390
40.0 4.54 9870
50.0 5.67 1.23 × 104
60.0 6.81 1.48 × 104
70.0 7.94 1.73 × 104
80.0 9.08 1.97 × 104
90.0 10.2 2.22 × 104
100 11.3 2.47 × 104
123 14.0 3.04 × 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 9.42 1.31 × 104
40.0 11.1 1.54 × 104
50.0 13.9 1.93 × 104
50.5 14.0 1.95 × 104
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