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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W12 × 58
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 = 475 in4) for the W12 × 58 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: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 2.92 × 10-6 10.0
60.0 3.02 × 10-6 10.4
70.0 3.53 × 10-6 12.1
80.0 4.03 × 10-6 13.9
90.0 4.53 × 10-6 15.6
100 5.04 × 10-6 17.3
200 1.01 × 10-5 34.6
300 1.51 × 10-5 52.0
400 2.02 × 10-5 69.3
500 2.52 × 10-5 86.6
600 3.02 × 10-5 104
700 3.53 × 10-5 121
800 4.03 × 10-5 139
900 4.53 × 10-5 156
1000 5.04 × 10-5 173
2000 1.01 × 10-4 346
3000 1.51 × 10-4 520
4000 2.02 × 10-4 693
5000 2.52 × 10-4 866
6000 3.02 × 10-4 1040
7000 3.53 × 10-4 1210
8000 4.03 × 10-4 1390
9000 4.53 × 10-4 1560
1.00 × 104 5.04 × 10-4 1730
2.00 × 104 0.00101 3460
3.00 × 104 0.00151 5200
4.00 × 104 0.00202 6930
5.00 × 104 0.00252 8660
6.00 × 104 0.00302 1.04 × 104
7.00 × 104 0.00353 1.21 × 104
8.00 × 104 0.00403 1.39 × 104
9.00 × 104 0.00453 1.56 × 104
1.00 × 105 0.00504 1.73 × 104
2.00 × 105 0.0101 3.46 × 104
3.00 × 105 0.0151 5.20 × 104
4.00 × 105 0.0202 6.93 × 104
5.00 × 105 0.0252 8.66 × 104
6.00 × 105 0.0302 1.04 × 105
7.00 × 105 0.0353 1.21 × 105
8.00 × 105 0.0403 1.39 × 105
9.00 × 105 0.0453 1.56 × 105
1.00 × 106 0.0504 1.73 × 105
1.71 × 106 0.0864 2.97 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 2.26 × 10-5 27.9
60.0 2.33 × 10-5 28.9
70.0 2.72 × 10-5 33.7
80.0 3.11 × 10-5 38.5
90.0 3.50 × 10-5 43.3
100 3.89 × 10-5 48.1
200 7.78 × 10-5 96.2
300 1.17 × 10-4 144
400 1.56 × 10-4 192
500 1.94 × 10-4 241
600 2.33 × 10-4 289
700 2.72 × 10-4 337
800 3.11 × 10-4 385
900 3.50 × 10-4 433
1000 3.89 × 10-4 481
2000 7.78 × 10-4 962
3000 0.00117 1440
4000 0.00156 1920
5000 0.00194 2410
6000 0.00233 2890
7000 0.00272 3370
8000 0.00311 3850
9000 0.00350 4330
1.00 × 104 0.00389 4810
2.00 × 104 0.00778 9620
3.00 × 104 0.0117 1.44 × 104
4.00 × 104 0.0156 1.92 × 104
5.00 × 104 0.0194 2.41 × 104
6.00 × 104 0.0233 2.89 × 104
7.00 × 104 0.0272 3.37 × 104
8.00 × 104 0.0311 3.85 × 104
9.00 × 104 0.0350 4.33 × 104
1.00 × 105 0.0389 4.81 × 104
2.00 × 105 0.0778 9.62 × 104
3.00 × 105 0.117 1.44 × 105
4.00 × 105 0.156 1.92 × 105
5.00 × 105 0.194 2.41 × 105
6.00 × 105 0.233 2.89 × 105
6.17 × 105 0.240 2.97 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 3.61 × 10-4 112
60.0 3.73 × 10-4 115
70.0 4.35 × 10-4 135
80.0 4.98 × 10-4 154
90.0 5.60 × 10-4 173
100 6.22 × 10-4 192
200 0.00124 385
300 0.00187 577
400 0.00249 770
500 0.00311 962
600 0.00373 1150
700 0.00435 1350
800 0.00498 1540
900 0.00560 1730
1000 0.00622 1920
2000 0.0124 3850
3000 0.0187 5770
4000 0.0249 7700
5000 0.0311 9620
6000 0.0373 1.15 × 104
7000 0.0435 1.35 × 104
8000 0.0498 1.54 × 104
9000 0.0560 1.73 × 104
1.00 × 104 0.0622 1.92 × 104
2.00 × 104 0.124 3.85 × 104
3.00 × 104 0.187 5.77 × 104
4.00 × 104 0.249 7.70 × 104
5.00 × 104 0.311 9.62 × 104
6.00 × 104 0.373 1.15 × 105
7.00 × 104 0.435 1.35 × 105
8.00 × 104 0.498 1.54 × 105
9.00 × 104 0.560 1.73 × 105
1.00 × 105 0.622 1.92 × 105
1.54 × 105 0.960 2.97 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 0.00183 251
60.0 0.00189 260
70.0 0.00220 303
80.0 0.00252 346
90.0 0.00283 390
100 0.00315 433
200 0.00630 866
300 0.00945 1300
400 0.0126 1730
500 0.0157 2170
600 0.0189 2600
700 0.0220 3030
800 0.0252 3460
900 0.0283 3900
1000 0.0315 4330
2000 0.0630 8660
3000 0.0945 1.30 × 104
4000 0.126 1.73 × 104
5000 0.157 2.17 × 104
6000 0.189 2.60 × 104
7000 0.220 3.03 × 104
8000 0.252 3.46 × 104
9000 0.283 3.90 × 104
1.00 × 104 0.315 4.33 × 104
2.00 × 104 0.630 8.66 × 104
3.00 × 104 0.945 1.30 × 105
4.00 × 104 1.26 1.73 × 105
5.00 × 104 1.57 2.17 × 105
6.00 × 104 1.89 2.60 × 105
6.86 × 104 2.16 2.97 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 0.00577 447
60.0 0.00597 462
70.0 0.00697 539
80.0 0.00796 616
90.0 0.00896 693
100 0.00995 770
200 0.0199 1540
300 0.0299 2310
400 0.0398 3080
500 0.0498 3850
600 0.0597 4620
700 0.0697 5390
800 0.0796 6160
900 0.0896 6930
1000 0.0995 7700
2000 0.199 1.54 × 104
3000 0.299 2.31 × 104
4000 0.398 3.08 × 104
5000 0.498 3.85 × 104
6000 0.597 4.62 × 104
7000 0.697 5.39 × 104
8000 0.796 6.16 × 104
9000 0.896 6.93 × 104
1.00 × 104 0.995 7.70 × 104
2.00 × 104 1.99 1.54 × 105
3.00 × 104 2.99 2.31 × 105
3.86 × 104 3.84 2.97 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 0.0141 698
60.0 0.0146 722
70.0 0.0170 842
80.0 0.0194 962
90.0 0.0219 1080
100 0.0243 1200
200 0.0486 2410
300 0.0729 3610
400 0.0972 4810
500 0.122 6010
600 0.146 7220
700 0.170 8420
800 0.194 9620
900 0.219 1.08 × 104
1000 0.243 1.20 × 104
2000 0.486 2.41 × 104
3000 0.729 3.61 × 104
4000 0.972 4.81 × 104
5000 1.22 6.01 × 104
6000 1.46 7.22 × 104
7000 1.70 8.42 × 104
8000 1.94 9.62 × 104
9000 2.19 1.08 × 105
1.00 × 104 2.43 1.20 × 105
2.00 × 104 4.86 2.41 × 105
2.47 × 104 6.00 2.97 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 0.0292 1000
60.0 0.0302 1040
70.0 0.0353 1210
80.0 0.0403 1390
90.0 0.0453 1560
100 0.0504 1730
200 0.101 3460
300 0.151 5200
400 0.202 6930
500 0.252 8660
600 0.302 1.04 × 104
700 0.353 1.21 × 104
800 0.403 1.39 × 104
900 0.453 1.56 × 104
1000 0.504 1.73 × 104
2000 1.01 3.46 × 104
3000 1.51 5.20 × 104
4000 2.02 6.93 × 104
5000 2.52 8.66 × 104
6000 3.02 1.04 × 105
7000 3.53 1.21 × 105
8000 4.03 1.39 × 105
9000 4.53 1.56 × 105
1.00 × 104 5.04 1.73 × 105
1.71 × 104 8.64 2.97 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 0.0924 1790
60.0 0.0956 1850
70.0 0.111 2160
80.0 0.127 2460
90.0 0.143 2770
100 0.159 3080
200 0.319 6160
300 0.478 9240
400 0.637 1.23 × 104
500 0.796 1.54 × 104
600 0.956 1.85 × 104
700 1.11 2.16 × 104
800 1.27 2.46 × 104
900 1.43 2.77 × 104
1000 1.59 3.08 × 104
2000 3.19 6.16 × 104
3000 4.78 9.24 × 104
4000 6.37 1.23 × 105
5000 7.96 1.54 × 105
6000 9.56 1.85 × 105
7000 11.1 2.16 × 105
7650 12.2 2.36 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 0.226 2790
60.0 0.233 2890
70.0 0.272 3370
80.0 0.311 3850
90.0 0.350 4330
100 0.389 4810
200 0.778 9620
300 1.17 1.44 × 104
400 1.56 1.92 × 104
500 1.94 2.41 × 104
600 2.33 2.89 × 104
700 2.72 3.37 × 104
800 3.11 3.85 × 104
900 3.50 4.33 × 104
1000 3.89 4.81 × 104
2000 7.78 9.62 × 104
3000 11.7 1.44 × 105
3140 12.2 1.51 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 0.468 4020
60.0 0.484 4160
70.0 0.564 4850
80.0 0.645 5540
90.0 0.726 6240
100 0.806 6930
200 1.61 1.39 × 104
300 2.42 2.08 × 104
400 3.22 2.77 × 104
500 4.03 3.46 × 104
600 4.84 4.16 × 104
700 5.64 4.85 × 104
800 6.45 5.54 × 104
900 7.26 6.24 × 104
1000 8.06 6.93 × 104
1510 12.2 1.05 × 105
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 0.866 5470
60.0 0.896 5660
70.0 1.05 6600
80.0 1.19 7540
90.0 1.34 8490
100 1.49 9430
200 2.99 1.89 × 104
300 4.48 2.83 × 104
400 5.97 3.77 × 104
500 7.47 4.72 × 104
600 8.96 5.66 × 104
700 10.5 6.60 × 104
800 11.9 7.54 × 104
816 12.2 7.70 × 104
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 1.48 7140
60.0 1.53 7390
70.0 1.78 8620
80.0 2.04 9850
90.0 2.29 1.11 × 104
100 2.55 1.23 × 104
200 5.10 2.46 × 104
300 7.64 3.70 × 104
400 10.2 4.93 × 104
478 12.2 5.89 × 104
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 2.37 9040
60.0 2.45 9350
70.0 2.86 1.09 × 104
80.0 3.27 1.25 × 104
90.0 3.67 1.40 × 104
100 4.08 1.56 × 104
200 8.16 3.12 × 104
299 12.2 4.66 × 104
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 3.61 1.12 × 104
60.0 3.73 1.15 × 104
70.0 4.35 1.35 × 104
80.0 4.98 1.54 × 104
90.0 5.60 1.73 × 104
100 6.22 1.92 × 104
196 12.2 3.77 × 104
Steel I Beam: W12 × 58 (Wide Flange 12 inch tall × 58 lbf/ft)
L = 125 ft
P (lbf/ft) w_max (in) stress_max (psi)
58.0 8.81 1.74 × 104
60.0 9.11 1.80 × 104
70.0 10.6 2.11 × 104
80.0 12.2 2.41 × 104
80.3 12.2 2.41 × 104
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