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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four Equal Spans » Wide Flange Steel I Beam » W14 × 43
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 = 428 in4) for the W14 × 43 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 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 2.91 × 10-6 7.94
50.0 3.38 × 10-6 9.23
60.0 4.06 × 10-6 11.1
70.0 4.74 × 10-6 12.9
80.0 5.41 × 10-6 14.8
90.0 6.09 × 10-6 16.6
100 6.76 × 10-6 18.5
200 1.35 × 10-5 36.9
300 2.03 × 10-5 55.4
400 2.71 × 10-5 73.8
500 3.38 × 10-5 92.3
600 4.06 × 10-5 111
700 4.74 × 10-5 129
800 5.41 × 10-5 148
900 6.09 × 10-5 166
1000 6.76 × 10-5 185
2000 1.35 × 10-4 369
3000 2.03 × 10-4 554
4000 2.71 × 10-4 738
5000 3.38 × 10-4 923
6000 4.06 × 10-4 1110
7000 4.74 × 10-4 1290
8000 5.41 × 10-4 1480
9000 6.09 × 10-4 1660
1.00 × 104 6.76 × 10-4 1850
2.00 × 104 0.00135 3690
3.00 × 104 0.00203 5540
4.00 × 104 0.00271 7380
5.00 × 104 0.00338 9230
6.00 × 104 0.00406 1.11 × 104
7.00 × 104 0.00474 1.29 × 104
8.00 × 104 0.00541 1.48 × 104
9.00 × 104 0.00609 1.66 × 104
1.00 × 105 0.00676 1.85 × 104
2.00 × 105 0.0135 3.69 × 104
3.00 × 105 0.0203 5.54 × 104
4.00 × 105 0.0271 7.38 × 104
5.00 × 105 0.0338 9.23 × 104
6.00 × 105 0.0406 1.11 × 105
7.00 × 105 0.0474 1.29 × 105
8.00 × 105 0.0541 1.48 × 105
9.00 × 105 0.0609 1.66 × 105
1.00 × 106 0.0676 1.85 × 105
1.61 × 106 0.109 2.97 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 2.24 × 10-5 22.0
50.0 2.61 × 10-5 25.6
60.0 3.13 × 10-5 30.8
70.0 3.65 × 10-5 35.9
80.0 4.18 × 10-5 41.0
90.0 4.70 × 10-5 46.1
100 5.22 × 10-5 51.3
200 1.04 × 10-4 103
300 1.57 × 10-4 154
400 2.09 × 10-4 205
500 2.61 × 10-4 256
600 3.13 × 10-4 308
700 3.65 × 10-4 359
800 4.18 × 10-4 410
900 4.70 × 10-4 461
1000 5.22 × 10-4 513
2000 0.00104 1030
3000 0.00157 1540
4000 0.00209 2050
5000 0.00261 2560
6000 0.00313 3080
7000 0.00365 3590
8000 0.00418 4100
9000 0.00470 4610
1.00 × 104 0.00522 5130
2.00 × 104 0.0104 1.03 × 104
3.00 × 104 0.0157 1.54 × 104
4.00 × 104 0.0209 2.05 × 104
5.00 × 104 0.0261 2.56 × 104
6.00 × 104 0.0313 3.08 × 104
7.00 × 104 0.0365 3.59 × 104
8.00 × 104 0.0418 4.10 × 104
9.00 × 104 0.0470 4.61 × 104
1.00 × 105 0.0522 5.13 × 104
2.00 × 105 0.104 1.03 × 105
3.00 × 105 0.157 1.54 × 105
4.00 × 105 0.209 2.05 × 105
5.00 × 105 0.261 2.56 × 105
5.79 × 105 0.302 2.97 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 3.59 × 10-4 88.2
50.0 4.18 × 10-4 103
60.0 5.01 × 10-4 123
70.0 5.85 × 10-4 144
80.0 6.68 × 10-4 164
90.0 7.52 × 10-4 185
100 8.35 × 10-4 205
200 0.00167 410
300 0.00251 615
400 0.00334 820
500 0.00418 1030
600 0.00501 1230
700 0.00585 1440
800 0.00668 1640
900 0.00752 1850
1000 0.00835 2050
2000 0.0167 4100
3000 0.0251 6150
4000 0.0334 8200
5000 0.0418 1.03 × 104
6000 0.0501 1.23 × 104
7000 0.0585 1.44 × 104
8000 0.0668 1.64 × 104
9000 0.0752 1.85 × 104
1.00 × 104 0.0835 2.05 × 104
2.00 × 104 0.167 4.10 × 104
3.00 × 104 0.251 6.15 × 104
4.00 × 104 0.334 8.20 × 104
5.00 × 104 0.418 1.03 × 105
6.00 × 104 0.501 1.23 × 105
7.00 × 104 0.585 1.44 × 105
8.00 × 104 0.668 1.64 × 105
9.00 × 104 0.752 1.85 × 105
1.00 × 105 0.835 2.05 × 105
1.45 × 105 1.21 2.97 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 0.00182 198
50.0 0.00211 231
60.0 0.00254 277
70.0 0.00296 323
80.0 0.00338 369
90.0 0.00380 415
100 0.00423 461
200 0.00846 923
300 0.0127 1380
400 0.0169 1850
500 0.0211 2310
600 0.0254 2770
700 0.0296 3230
800 0.0338 3690
900 0.0380 4150
1000 0.0423 4610
2000 0.0846 9230
3000 0.127 1.38 × 104
4000 0.169 1.85 × 104
5000 0.211 2.31 × 104
6000 0.254 2.77 × 104
7000 0.296 3.23 × 104
8000 0.338 3.69 × 104
9000 0.380 4.15 × 104
1.00 × 104 0.423 4.61 × 104
2.00 × 104 0.846 9.23 × 104
3.00 × 104 1.27 1.38 × 105
4.00 × 104 1.69 1.85 × 105
5.00 × 104 2.11 2.31 × 105
6.00 × 104 2.54 2.77 × 105
6.44 × 104 2.72 2.97 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 0.00575 353
50.0 0.00668 410
60.0 0.00802 492
70.0 0.00935 574
80.0 0.0107 656
90.0 0.0120 738
100 0.0134 820
200 0.0267 1640
300 0.0401 2460
400 0.0534 3280
500 0.0668 4100
600 0.0802 4920
700 0.0935 5740
800 0.107 6560
900 0.120 7380
1000 0.134 8200
2000 0.267 1.64 × 104
3000 0.401 2.46 × 104
4000 0.534 3.28 × 104
5000 0.668 4.10 × 104
6000 0.802 4.92 × 104
7000 0.935 5.74 × 104
8000 1.07 6.56 × 104
9000 1.20 7.38 × 104
1.00 × 104 1.34 8.20 × 104
2.00 × 104 2.67 1.64 × 105
3.00 × 104 4.01 2.46 × 105
3.62 × 104 4.84 2.97 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 0.0140 551
50.0 0.0163 641
60.0 0.0196 769
70.0 0.0228 897
80.0 0.0261 1030
90.0 0.0294 1150
100 0.0326 1280
200 0.0652 2560
300 0.0979 3850
400 0.130 5130
500 0.163 6410
600 0.196 7690
700 0.228 8970
800 0.261 1.03 × 104
900 0.294 1.15 × 104
1000 0.326 1.28 × 104
2000 0.652 2.56 × 104
3000 0.979 3.85 × 104
4000 1.30 5.13 × 104
5000 1.63 6.41 × 104
6000 1.96 7.69 × 104
7000 2.28 8.97 × 104
8000 2.61 1.03 × 105
9000 2.94 1.15 × 105
1.00 × 104 3.26 1.28 × 105
2.00 × 104 6.52 2.56 × 105
2.32 × 104 7.56 2.97 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 0.0291 794
50.0 0.0338 923
60.0 0.0406 1110
70.0 0.0474 1290
80.0 0.0541 1480
90.0 0.0609 1660
100 0.0676 1850
200 0.135 3690
300 0.203 5540
400 0.271 7380
500 0.338 9230
600 0.406 1.11 × 104
700 0.474 1.29 × 104
800 0.541 1.48 × 104
900 0.609 1.66 × 104
1000 0.676 1.85 × 104
2000 1.35 3.69 × 104
3000 2.03 5.54 × 104
4000 2.71 7.38 × 104
5000 3.38 9.23 × 104
6000 4.06 1.11 × 105
7000 4.74 1.29 × 105
8000 5.41 1.48 × 105
9000 6.09 1.66 × 105
1.00 × 104 6.76 1.85 × 105
1.61 × 104 10.9 2.97 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 0.0919 1410
50.0 0.107 1640
60.0 0.128 1970
70.0 0.150 2300
80.0 0.171 2630
90.0 0.192 2950
100 0.214 3280
200 0.428 6560
300 0.641 9840
400 0.855 1.31 × 104
500 1.07 1.64 × 104
600 1.28 1.97 × 104
700 1.50 2.30 × 104
800 1.71 2.63 × 104
900 1.92 2.95 × 104
1000 2.14 3.28 × 104
2000 4.28 6.56 × 104
3000 6.41 9.84 × 104
4000 8.55 1.31 × 105
5000 10.7 1.64 × 105
6000 12.8 1.97 × 105
6390 13.7 2.10 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 0.224 2200
50.0 0.261 2560
60.0 0.313 3080
70.0 0.365 3590
80.0 0.418 4100
90.0 0.470 4610
100 0.522 5130
200 1.04 1.03 × 104
300 1.57 1.54 × 104
400 2.09 2.05 × 104
500 2.61 2.56 × 104
600 3.13 3.08 × 104
700 3.65 3.59 × 104
800 4.18 4.10 × 104
900 4.70 4.61 × 104
1000 5.22 5.13 × 104
2000 10.4 1.03 × 105
2620 13.7 1.34 × 105
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 0.465 3170
50.0 0.541 3690
60.0 0.649 4430
70.0 0.758 5170
80.0 0.866 5910
90.0 0.974 6640
100 1.08 7380
200 2.16 1.48 × 104
300 3.25 2.21 × 104
400 4.33 2.95 × 104
500 5.41 3.69 × 104
600 6.49 4.43 × 104
700 7.58 5.17 × 104
800 8.66 5.91 × 104
900 9.74 6.64 × 104
1000 10.8 7.38 × 104
1260 13.7 9.32 × 104
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 0.862 4320
50.0 1.00 5020
60.0 1.20 6030
70.0 1.40 7030
80.0 1.60 8040
90.0 1.80 9040
100 2.01 1.00 × 104
200 4.01 2.01 × 104
300 6.02 3.01 × 104
400 8.02 4.02 × 104
500 10.0 5.02 × 104
600 12.0 6.03 × 104
681 13.7 6.85 × 104
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 1.47 5640
50.0 1.71 6560
60.0 2.05 7880
70.0 2.39 9190
80.0 2.74 1.05 × 104
90.0 3.08 1.18 × 104
100 3.42 1.31 × 104
200 6.84 2.63 × 104
300 10.3 3.94 × 104
399 13.7 5.24 × 104
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 2.36 7140
50.0 2.74 8310
60.0 3.29 9970
70.0 3.84 1.16 × 104
80.0 4.38 1.33 × 104
90.0 4.93 1.50 × 104
100 5.48 1.66 × 104
200 11.0 3.32 × 104
249 13.7 4.14 × 104
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 3.59 8820
50.0 4.18 1.03 × 104
60.0 5.01 1.23 × 104
70.0 5.85 1.44 × 104
80.0 6.68 1.64 × 104
90.0 7.52 1.85 × 104
100 8.35 2.05 × 104
164 13.7 3.35 × 104
Steel I Beam: W14 × 43 (Wide Flange 14 inch tall × 43 lbf/ft)
L = 125 ft
P (lbf/ft) w_max (in) stress_max (psi)
43.0 8.77 1.38 × 104
50.0 10.2 1.60 × 104
60.0 12.2 1.92 × 104
67.0 13.7 2.15 × 104
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