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Wide Flange Steel I Beam: W6 × 12
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W6 × 12
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 = 22.1 in4) for the W6 × 12 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
  
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 1.30 × 10-5 22.1
20.0 2.17 × 10-5 36.8
30.0 3.25 × 10-5 55.3
40.0 4.33 × 10-5 73.7
50.0 5.42 × 10-5 92.1
60.0 6.50 × 10-5 111
70.0 7.58 × 10-5 129
80.0 8.66 × 10-5 147
90.0 9.75 × 10-5 166
100 1.08 × 10-4 184
200 2.17 × 10-4 368
300 3.25 × 10-4 553
400 4.33 × 10-4 737
500 5.42 × 10-4 921
600 6.50 × 10-4 1110
700 7.58 × 10-4 1290
800 8.66 × 10-4 1470
900 9.75 × 10-4 1660
1000 0.00108 1840
2000 0.00217 3680
3000 0.00325 5530
4000 0.00433 7370
5000 0.00542 9210
6000 0.00650 1.11 × 104
7000 0.00758 1.29 × 104
8000 0.00866 1.47 × 104
9000 0.00975 1.66 × 104
1.00 × 104 0.0108 1.84 × 104
2.00 × 104 0.0217 3.68 × 104
3.00 × 104 0.0325 5.53 × 104
4.00 × 104 0.0433 7.37 × 104
5.00 × 104 0.0542 9.21 × 104
6.00 × 104 0.0650 1.11 × 105
7.00 × 104 0.0758 1.29 × 105
8.00 × 104 0.0866 1.47 × 105
9.00 × 104 0.0975 1.66 × 105
1.00 × 105 0.108 1.84 × 105
1.61 × 105 0.175 2.97 × 105
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 1.00 × 10-4 61.4
20.0 1.67 × 10-4 102
30.0 2.51 × 10-4 153
40.0 3.34 × 10-4 205
50.0 4.18 × 10-4 256
60.0 5.01 × 10-4 307
70.0 5.85 × 10-4 358
80.0 6.69 × 10-4 409
90.0 7.52 × 10-4 460
100 8.36 × 10-4 512
200 0.00167 1020
300 0.00251 1530
400 0.00334 2050
500 0.00418 2560
600 0.00501 3070
700 0.00585 3580
800 0.00669 4090
900 0.00752 4600
1000 0.00836 5120
2000 0.0167 1.02 × 104
3000 0.0251 1.53 × 104
4000 0.0334 2.05 × 104
5000 0.0418 2.56 × 104
6000 0.0501 3.07 × 104
7000 0.0585 3.58 × 104
8000 0.0669 4.09 × 104
9000 0.0752 4.60 × 104
1.00 × 104 0.0836 5.12 × 104
2.00 × 104 0.167 1.02 × 105
3.00 × 104 0.251 1.53 × 105
4.00 × 104 0.334 2.05 × 105
5.00 × 104 0.418 2.56 × 105
5.81 × 104 0.485 2.97 × 105
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 0.00160 246
20.0 0.00267 409
30.0 0.00401 614
40.0 0.00535 819
50.0 0.00669 1020
60.0 0.00802 1230
70.0 0.00936 1430
80.0 0.0107 1640
90.0 0.0120 1840
100 0.0134 2050
200 0.0267 4090
300 0.0401 6140
400 0.0535 8190
500 0.0669 1.02 × 104
600 0.0802 1.23 × 104
700 0.0936 1.43 × 104
800 0.107 1.64 × 104
900 0.120 1.84 × 104
1000 0.134 2.05 × 104
2000 0.267 4.09 × 104
3000 0.401 6.14 × 104
4000 0.535 8.19 × 104
5000 0.669 1.02 × 105
6000 0.802 1.23 × 105
7000 0.936 1.43 × 105
8000 1.07 1.64 × 105
9000 1.20 1.84 × 105
1.00 × 104 1.34 2.05 × 105
1.45 × 104 1.94 2.97 × 105
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 0.00812 553
20.0 0.0135 921
30.0 0.0203 1380
40.0 0.0271 1840
50.0 0.0338 2300
60.0 0.0406 2760
70.0 0.0474 3220
80.0 0.0542 3680
90.0 0.0609 4140
100 0.0677 4600
200 0.135 9210
300 0.203 1.38 × 104
400 0.271 1.84 × 104
500 0.338 2.30 × 104
600 0.406 2.76 × 104
700 0.474 3.22 × 104
800 0.542 3.68 × 104
900 0.609 4.14 × 104
1000 0.677 4.60 × 104
2000 1.35 9.21 × 104
3000 2.03 1.38 × 105
4000 2.71 1.84 × 105
5000 3.38 2.30 × 105
6000 4.06 2.76 × 105
6450 4.37 2.97 × 105
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 0.0257 982
20.0 0.0428 1640
30.0 0.0642 2460
40.0 0.0856 3270
50.0 0.107 4090
60.0 0.128 4910
70.0 0.150 5730
80.0 0.171 6550
90.0 0.193 7370
100 0.214 8190
200 0.428 1.64 × 104
300 0.642 2.46 × 104
400 0.856 3.27 × 104
500 1.07 4.09 × 104
600 1.28 4.91 × 104
700 1.50 5.73 × 104
800 1.71 6.55 × 104
900 1.93 7.37 × 104
1000 2.14 8.19 × 104
2000 4.28 1.64 × 105
2820 6.03 2.31 × 105
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 0.0627 1530
20.0 0.104 2560
30.0 0.157 3840
40.0 0.209 5120
50.0 0.261 6390
60.0 0.313 7670
70.0 0.366 8950
80.0 0.418 1.02 × 104
90.0 0.470 1.15 × 104
100 0.522 1.28 × 104
200 1.04 2.56 × 104
300 1.57 3.84 × 104
400 2.09 5.12 × 104
500 2.61 6.39 × 104
600 3.13 7.67 × 104
700 3.66 8.95 × 104
800 4.18 1.02 × 105
900 4.70 1.15 × 105
1000 5.22 1.28 × 105
1150 6.03 1.48 × 105
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 0.130 2210
20.0 0.217 3680
30.0 0.325 5530
40.0 0.433 7370
50.0 0.542 9210
60.0 0.650 1.11 × 104
70.0 0.758 1.29 × 104
80.0 0.866 1.47 × 104
90.0 0.975 1.66 × 104
100 1.08 1.84 × 104
200 2.17 3.68 × 104
300 3.25 5.53 × 104
400 4.33 7.37 × 104
500 5.42 9.21 × 104
557 6.03 1.03 × 105
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 0.411 3930
20.0 0.685 6550
30.0 1.03 9820
40.0 1.37 1.31 × 104
50.0 1.71 1.64 × 104
60.0 2.05 1.96 × 104
70.0 2.40 2.29 × 104
80.0 2.74 2.62 × 104
90.0 3.08 2.95 × 104
100 3.42 3.27 × 104
176 6.03 5.77 × 104
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 1.00 6140
20.0 1.67 1.02 × 104
30.0 2.51 1.53 × 104
40.0 3.34 2.05 × 104
50.0 4.18 2.56 × 104
60.0 5.01 3.07 × 104
70.0 5.85 3.58 × 104
72.2 6.03 3.69 × 104
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 2.08 8840
20.0 3.47 1.47 × 104
30.0 5.20 2.21 × 104
34.8 6.03 2.56 × 104
Steel I Beam: W6 × 12 (Wide Flange 6 inch tall × 12 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
12.0 3.85 1.20 × 104
18.8 6.03 1.88 × 104
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