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Wide Flange Steel I Beam: W12 × 35
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W12 × 35
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 = 285 in4) for the W12 × 35 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 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 2.94 × 10-6 10.4
40.0 3.36 × 10-6 11.8
50.0 4.20 × 10-6 14.8
60.0 5.04 × 10-6 17.8
70.0 5.88 × 10-6 20.7
80.0 6.72 × 10-6 23.7
90.0 7.56 × 10-6 26.6
100 8.40 × 10-6 29.6
200 1.68 × 10-5 59.2
300 2.52 × 10-5 88.8
400 3.36 × 10-5 118
500 4.20 × 10-5 148
600 5.04 × 10-5 178
700 5.88 × 10-5 207
800 6.72 × 10-5 237
900 7.56 × 10-5 266
1000 8.40 × 10-5 296
2000 1.68 × 10-4 592
3000 2.52 × 10-4 888
4000 3.36 × 10-4 1180
5000 4.20 × 10-4 1480
6000 5.04 × 10-4 1780
7000 5.88 × 10-4 2070
8000 6.72 × 10-4 2370
9000 7.56 × 10-4 2660
1.00 × 104 8.40 × 10-4 2960
2.00 × 104 0.00168 5920
3.00 × 104 0.00252 8880
4.00 × 104 0.00336 1.18 × 104
5.00 × 104 0.00420 1.48 × 104
6.00 × 104 0.00504 1.78 × 104
7.00 × 104 0.00588 2.07 × 104
8.00 × 104 0.00672 2.37 × 104
9.00 × 104 0.00756 2.66 × 104
1.00 × 105 0.00840 2.96 × 104
2.00 × 105 0.0168 5.92 × 104
3.00 × 105 0.0252 8.88 × 104
4.00 × 105 0.0336 1.18 × 105
5.00 × 105 0.0420 1.48 × 105
6.00 × 105 0.0504 1.78 × 105
7.00 × 105 0.0588 2.07 × 105
8.00 × 105 0.0672 2.37 × 105
9.00 × 105 0.0756 2.66 × 105
1.00 × 106 0.0840 2.96 × 105
1.00 × 106 0.0843 2.97 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 2.27 × 10-5 28.8
40.0 2.59 × 10-5 32.9
50.0 3.24 × 10-5 41.1
60.0 3.89 × 10-5 49.3
70.0 4.54 × 10-5 57.6
80.0 5.18 × 10-5 65.8
90.0 5.83 × 10-5 74.0
100 6.48 × 10-5 82.2
200 1.30 × 10-4 164
300 1.94 × 10-4 247
400 2.59 × 10-4 329
500 3.24 × 10-4 411
600 3.89 × 10-4 493
700 4.54 × 10-4 576
800 5.18 × 10-4 658
900 5.83 × 10-4 740
1000 6.48 × 10-4 822
2000 0.00130 1640
3000 0.00194 2470
4000 0.00259 3290
5000 0.00324 4110
6000 0.00389 4930
7000 0.00454 5760
8000 0.00518 6580
9000 0.00583 7400
1.00 × 104 0.00648 8220
2.00 × 104 0.0130 1.64 × 104
3.00 × 104 0.0194 2.47 × 104
4.00 × 104 0.0259 3.29 × 104
5.00 × 104 0.0324 4.11 × 104
6.00 × 104 0.0389 4.93 × 104
7.00 × 104 0.0454 5.76 × 104
8.00 × 104 0.0518 6.58 × 104
9.00 × 104 0.0583 7.40 × 104
1.00 × 105 0.0648 8.22 × 104
2.00 × 105 0.130 1.64 × 105
3.00 × 105 0.194 2.47 × 105
3.61 × 105 0.234 2.97 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 3.63 × 10-4 115
40.0 4.15 × 10-4 132
50.0 5.18 × 10-4 164
60.0 6.22 × 10-4 197
70.0 7.26 × 10-4 230
80.0 8.29 × 10-4 263
90.0 9.33 × 10-4 296
100 0.00104 329
200 0.00207 658
300 0.00311 987
400 0.00415 1320
500 0.00518 1640
600 0.00622 1970
700 0.00726 2300
800 0.00829 2630
900 0.00933 2960
1000 0.0104 3290
2000 0.0207 6580
3000 0.0311 9870
4000 0.0415 1.32 × 104
5000 0.0518 1.64 × 104
6000 0.0622 1.97 × 104
7000 0.0726 2.30 × 104
8000 0.0829 2.63 × 104
9000 0.0933 2.96 × 104
1.00 × 104 0.104 3.29 × 104
2.00 × 104 0.207 6.58 × 104
3.00 × 104 0.311 9.87 × 104
4.00 × 104 0.415 1.32 × 105
5.00 × 104 0.518 1.64 × 105
6.00 × 104 0.622 1.97 × 105
7.00 × 104 0.726 2.30 × 105
8.00 × 104 0.829 2.63 × 105
9.00 × 104 0.933 2.96 × 105
9.03 × 104 0.936 2.97 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.00184 259
40.0 0.00210 296
50.0 0.00262 370
60.0 0.00315 444
70.0 0.00367 518
80.0 0.00420 592
90.0 0.00472 666
100 0.00525 740
200 0.0105 1480
300 0.0157 2220
400 0.0210 2960
500 0.0262 3700
600 0.0315 4440
700 0.0367 5180
800 0.0420 5920
900 0.0472 6660
1000 0.0525 7400
2000 0.105 1.48 × 104
3000 0.157 2.22 × 104
4000 0.210 2.96 × 104
5000 0.262 3.70 × 104
6000 0.315 4.44 × 104
7000 0.367 5.18 × 104
8000 0.420 5.92 × 104
9000 0.472 6.66 × 104
1.00 × 104 0.525 7.40 × 104
2.00 × 104 1.05 1.48 × 105
3.00 × 104 1.57 2.22 × 105
4.00 × 104 2.10 2.96 × 105
4.01 × 104 2.11 2.97 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.00581 461
40.0 0.00664 526
50.0 0.00829 658
60.0 0.00995 789
70.0 0.0116 921
80.0 0.0133 1050
90.0 0.0149 1180
100 0.0166 1320
200 0.0332 2630
300 0.0498 3950
400 0.0664 5260
500 0.0829 6580
600 0.0995 7890
700 0.116 9210
800 0.133 1.05 × 104
900 0.149 1.18 × 104
1000 0.166 1.32 × 104
2000 0.332 2.63 × 104
3000 0.498 3.95 × 104
4000 0.664 5.26 × 104
5000 0.829 6.58 × 104
6000 0.995 7.89 × 104
7000 1.16 9.21 × 104
8000 1.33 1.05 × 105
9000 1.49 1.18 × 105
1.00 × 104 1.66 1.32 × 105
2.00 × 104 3.32 2.63 × 105
2.26 × 104 3.74 2.97 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0142 720
40.0 0.0162 822
50.0 0.0203 1030
60.0 0.0243 1230
70.0 0.0284 1440
80.0 0.0324 1640
90.0 0.0365 1850
100 0.0405 2060
200 0.0810 4110
300 0.122 6170
400 0.162 8220
500 0.203 1.03 × 104
600 0.243 1.23 × 104
700 0.284 1.44 × 104
800 0.324 1.64 × 104
900 0.365 1.85 × 104
1000 0.405 2.06 × 104
2000 0.810 4.11 × 104
3000 1.22 6.17 × 104
4000 1.62 8.22 × 104
5000 2.03 1.03 × 105
6000 2.43 1.23 × 105
7000 2.84 1.44 × 105
8000 3.24 1.64 × 105
9000 3.65 1.85 × 105
1.00 × 104 4.05 2.06 × 105
1.44 × 104 5.85 2.97 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0294 1040
40.0 0.0336 1180
50.0 0.0420 1480
60.0 0.0504 1780
70.0 0.0588 2070
80.0 0.0672 2370
90.0 0.0756 2660
100 0.0840 2960
200 0.168 5920
300 0.252 8880
400 0.336 1.18 × 104
500 0.420 1.48 × 104
600 0.504 1.78 × 104
700 0.588 2.07 × 104
800 0.672 2.37 × 104
900 0.756 2.66 × 104
1000 0.840 2.96 × 104
2000 1.68 5.92 × 104
3000 2.52 8.88 × 104
4000 3.36 1.18 × 105
5000 4.20 1.48 × 105
6000 5.04 1.78 × 105
7000 5.88 2.07 × 105
8000 6.72 2.37 × 105
9000 7.56 2.66 × 105
1.00 × 104 8.40 2.96 × 105
1.00 × 104 8.43 2.97 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0929 1840
40.0 0.106 2110
50.0 0.133 2630
60.0 0.159 3160
70.0 0.186 3680
80.0 0.212 4210
90.0 0.239 4740
100 0.265 5260
200 0.531 1.05 × 104
300 0.796 1.58 × 104
400 1.06 2.11 × 104
500 1.33 2.63 × 104
600 1.59 3.16 × 104
700 1.86 3.68 × 104
800 2.12 4.21 × 104
900 2.39 4.74 × 104
1000 2.65 5.26 × 104
2000 5.31 1.05 × 105
3000 7.96 1.58 × 105
4000 10.6 2.11 × 105
4710 12.5 2.48 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.227 2880
40.0 0.259 3290
50.0 0.324 4110
60.0 0.389 4930
70.0 0.454 5760
80.0 0.518 6580
90.0 0.583 7400
100 0.648 8220
200 1.30 1.64 × 104
300 1.94 2.47 × 104
400 2.59 3.29 × 104
500 3.24 4.11 × 104
600 3.89 4.93 × 104
700 4.54 5.76 × 104
800 5.18 6.58 × 104
900 5.83 7.40 × 104
1000 6.48 8.22 × 104
1930 12.5 1.59 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.470 4140
40.0 0.537 4740
50.0 0.672 5920
60.0 0.806 7110
70.0 0.941 8290
80.0 1.07 9470
90.0 1.21 1.07 × 104
100 1.34 1.18 × 104
200 2.69 2.37 × 104
300 4.03 3.55 × 104
400 5.37 4.74 × 104
500 6.72 5.92 × 104
600 8.06 7.11 × 104
700 9.41 8.29 × 104
800 10.7 9.47 × 104
900 12.1 1.07 × 105
930 12.5 1.10 × 105
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.871 5640
40.0 0.996 6450
50.0 1.24 8060
60.0 1.49 9670
70.0 1.74 1.13 × 104
80.0 1.99 1.29 × 104
90.0 2.24 1.45 × 104
100 2.49 1.61 × 104
200 4.98 3.22 × 104
300 7.47 4.84 × 104
400 9.96 6.45 × 104
500 12.4 8.06 × 104
502 12.5 8.09 × 104
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 1.49 7370
40.0 1.70 8420
50.0 2.12 1.05 × 104
60.0 2.55 1.26 × 104
70.0 2.97 1.47 × 104
80.0 3.40 1.68 × 104
90.0 3.82 1.89 × 104
100 4.25 2.11 × 104
200 8.49 4.21 × 104
294 12.5 6.20 × 104
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 2.38 9330
40.0 2.72 1.07 × 104
50.0 3.40 1.33 × 104
60.0 4.08 1.60 × 104
70.0 4.76 1.87 × 104
80.0 5.44 2.13 × 104
90.0 6.12 2.40 × 104
100 6.80 2.66 × 104
184 12.5 4.90 × 104
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 3.63 1.15 × 104
40.0 4.15 1.32 × 104
50.0 5.18 1.64 × 104
60.0 6.22 1.97 × 104
70.0 7.26 2.30 × 104
80.0 8.29 2.63 × 104
90.0 9.33 2.96 × 104
100 10.4 3.29 × 104
121 12.5 3.97 × 104
Steel I Beam: W12 × 35 (Wide Flange 12 inch tall × 35 lbf/ft)
L = 125 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 8.86 1.80 × 104
40.0 10.1 2.06 × 104
49.4 12.5 2.54 × 104
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