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Wide Flange Steel I Beam: W12 × 65
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » Wide Flange Steel I Beam » W12 × 65
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in a single span, the maximum displacement w_max and the maximum normal stress stress_max occur at the center of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 533 in4) for the W12 × 65 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
   
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 7.30 × 10-6 9.98
70.0 7.86 × 10-6 10.7
80.0 8.98 × 10-6 12.3
90.0 1.01 × 10-5 13.8
100 1.12 × 10-5 15.3
200 2.25 × 10-5 30.7
300 3.37 × 10-5 46.0
400 4.49 × 10-5 61.4
500 5.61 × 10-5 76.7
600 6.74 × 10-5 92.1
700 7.86 × 10-5 107
800 8.98 × 10-5 123
900 1.01 × 10-4 138
1000 1.12 × 10-4 153
2000 2.25 × 10-4 307
3000 3.37 × 10-4 460
4000 4.49 × 10-4 614
5000 5.61 × 10-4 767
6000 6.74 × 10-4 921
7000 7.86 × 10-4 1070
8000 8.98 × 10-4 1230
9000 0.00101 1380
1.00 × 104 0.00112 1530
2.00 × 104 0.00225 3070
3.00 × 104 0.00337 4600
4.00 × 104 0.00449 6140
5.00 × 104 0.00561 7670
6.00 × 104 0.00674 9210
7.00 × 104 0.00786 1.07 × 104
8.00 × 104 0.00898 1.23 × 104
9.00 × 104 0.0101 1.38 × 104
1.00 × 105 0.0112 1.53 × 104
2.00 × 105 0.0225 3.07 × 104
3.00 × 105 0.0337 4.60 × 104
4.00 × 105 0.0449 6.14 × 104
5.00 × 105 0.0561 7.67 × 104
6.00 × 105 0.0674 9.21 × 104
7.00 × 105 0.0786 1.07 × 105
8.00 × 105 0.0898 1.23 × 105
9.00 × 105 0.101 1.38 × 105
1.00 × 106 0.112 1.53 × 105
1.94 × 106 0.217 2.97 × 105
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 5.63 × 10-5 27.7
70.0 6.06 × 10-5 29.8
80.0 6.93 × 10-5 34.1
90.0 7.80 × 10-5 38.4
100 8.66 × 10-5 42.6
200 1.73 × 10-4 85.3
300 2.60 × 10-4 128
400 3.46 × 10-4 171
500 4.33 × 10-4 213
600 5.20 × 10-4 256
700 6.06 × 10-4 298
800 6.93 × 10-4 341
900 7.80 × 10-4 384
1000 8.66 × 10-4 426
2000 0.00173 853
3000 0.00260 1280
4000 0.00346 1710
5000 0.00433 2130
6000 0.00520 2560
7000 0.00606 2980
8000 0.00693 3410
9000 0.00780 3840
1.00 × 104 0.00866 4260
2.00 × 104 0.0173 8530
3.00 × 104 0.0260 1.28 × 104
4.00 × 104 0.0346 1.71 × 104
5.00 × 104 0.0433 2.13 × 104
6.00 × 104 0.0520 2.56 × 104
7.00 × 104 0.0606 2.98 × 104
8.00 × 104 0.0693 3.41 × 104
9.00 × 104 0.0780 3.84 × 104
1.00 × 105 0.0866 4.26 × 104
2.00 × 105 0.173 8.53 × 104
3.00 × 105 0.260 1.28 × 105
4.00 × 105 0.346 1.71 × 105
5.00 × 105 0.433 2.13 × 105
6.00 × 105 0.520 2.56 × 105
6.97 × 105 0.603 2.97 × 105
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 9.01 × 10-4 111
70.0 9.70 × 10-4 119
80.0 0.00111 136
90.0 0.00125 153
100 0.00139 171
200 0.00277 341
300 0.00416 512
400 0.00554 682
500 0.00693 853
600 0.00832 1020
700 0.00970 1190
800 0.0111 1360
900 0.0125 1530
1000 0.0139 1710
2000 0.0277 3410
3000 0.0416 5120
4000 0.0554 6820
5000 0.0693 8530
6000 0.0832 1.02 × 104
7000 0.0970 1.19 × 104
8000 0.111 1.36 × 104
9000 0.125 1.53 × 104
1.00 × 104 0.139 1.71 × 104
2.00 × 104 0.277 3.41 × 104
3.00 × 104 0.416 5.12 × 104
4.00 × 104 0.554 6.82 × 104
5.00 × 104 0.693 8.53 × 104
6.00 × 104 0.832 1.02 × 105
7.00 × 104 0.970 1.19 × 105
8.00 × 104 1.11 1.36 × 105
9.00 × 104 1.25 1.53 × 105
1.00 × 105 1.39 1.71 × 105
1.74 × 105 2.41 2.97 × 105
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 0.00456 249
70.0 0.00491 269
80.0 0.00561 307
90.0 0.00631 345
100 0.00702 384
200 0.0140 767
300 0.0210 1150
400 0.0281 1530
500 0.0351 1920
600 0.0421 2300
700 0.0491 2690
800 0.0561 3070
900 0.0631 3450
1000 0.0702 3840
2000 0.140 7670
3000 0.210 1.15 × 104
4000 0.281 1.53 × 104
5000 0.351 1.92 × 104
6000 0.421 2.30 × 104
7000 0.491 2.69 × 104
8000 0.561 3.07 × 104
9000 0.631 3.45 × 104
1.00 × 104 0.702 3.84 × 104
2.00 × 104 1.40 7.67 × 104
3.00 × 104 2.10 1.15 × 105
4.00 × 104 2.81 1.53 × 105
5.00 × 104 3.51 1.92 × 105
6.00 × 104 4.21 2.30 × 105
7.00 × 104 4.91 2.69 × 105
7.74 × 104 5.43 2.97 × 105
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 0.0144 443
70.0 0.0155 478
80.0 0.0177 546
90.0 0.0200 614
100 0.0222 682
200 0.0444 1360
300 0.0665 2050
400 0.0887 2730
500 0.111 3410
600 0.133 4090
700 0.155 4780
800 0.177 5460
900 0.200 6140
1000 0.222 6820
2000 0.444 1.36 × 104
3000 0.665 2.05 × 104
4000 0.887 2.73 × 104
5000 1.11 3.41 × 104
6000 1.33 4.09 × 104
7000 1.55 4.78 × 104
8000 1.77 5.46 × 104
9000 2.00 6.14 × 104
1.00 × 104 2.22 6.82 × 104
2.00 × 104 4.44 1.36 × 105
3.00 × 104 6.65 2.05 × 105
4.00 × 104 8.87 2.73 × 105
4.35 × 104 9.66 2.97 × 105
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 0.0352 693
70.0 0.0379 746
80.0 0.0433 853
90.0 0.0487 959
100 0.0541 1070
200 0.108 2130
300 0.162 3200
400 0.217 4260
500 0.271 5330
600 0.325 6400
700 0.379 7460
800 0.433 8530
900 0.487 9590
1000 0.541 1.07 × 104
2000 1.08 2.13 × 104
3000 1.62 3.20 × 104
4000 2.17 4.26 × 104
5000 2.71 5.33 × 104
6000 3.25 6.40 × 104
7000 3.79 7.46 × 104
8000 4.33 8.53 × 104
9000 4.87 9.59 × 104
1.00 × 104 5.41 1.07 × 105
2.00 × 104 10.8 2.13 × 105
2.79 × 104 15.1 2.97 × 105
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 0.0730 998
70.0 0.0786 1070
80.0 0.0898 1230
90.0 0.101 1380
100 0.112 1530
200 0.225 3070
300 0.337 4600
400 0.449 6140
500 0.561 7670
600 0.674 9210
700 0.786 1.07 × 104
800 0.898 1.23 × 104
900 1.01 1.38 × 104
1000 1.12 1.53 × 104
2000 2.25 3.07 × 104
3000 3.37 4.60 × 104
4000 4.49 6.14 × 104
5000 5.61 7.67 × 104
6000 6.74 9.21 × 104
7000 7.86 1.07 × 105
8000 8.98 1.23 × 105
9000 10.1 1.38 × 105
1.00 × 104 11.2 1.53 × 105
1.94 × 104 21.7 2.97 × 105
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 0.231 1770
70.0 0.248 1910
80.0 0.284 2180
90.0 0.319 2460
100 0.355 2730
200 0.710 5460
300 1.06 8190
400 1.42 1.09 × 104
500 1.77 1.36 × 104
600 2.13 1.64 × 104
700 2.48 1.91 × 104
800 2.84 2.18 × 104
900 3.19 2.46 × 104
1000 3.55 2.73 × 104
2000 7.10 5.46 × 104
3000 10.6 8.19 × 104
3420 12.1 9.32 × 104
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 0.563 2770
70.0 0.606 2980
80.0 0.693 3410
90.0 0.780 3840
100 0.866 4260
200 1.73 8530
300 2.60 1.28 × 104
400 3.46 1.71 × 104
500 4.33 2.13 × 104
600 5.20 2.56 × 104
700 6.06 2.98 × 104
800 6.93 3.41 × 104
900 7.80 3.84 × 104
1000 8.66 4.26 × 104
1400 12.1 5.97 × 104
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 1.17 3990
70.0 1.26 4300
80.0 1.44 4910
90.0 1.62 5530
100 1.80 6140
200 3.59 1.23 × 104
300 5.39 1.84 × 104
400 7.18 2.46 × 104
500 8.98 3.07 × 104
600 10.8 3.68 × 104
675 12.1 4.14 × 104
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 2.16 5430
70.0 2.33 5850
80.0 2.66 6690
90.0 2.99 7520
100 3.33 8360
200 6.66 1.67 × 104
300 9.98 2.51 × 104
364 12.1 3.04 × 104
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 3.69 7090
70.0 3.97 7640
80.0 4.54 8730
90.0 5.11 9820
100 5.68 1.09 × 104
200 11.4 2.18 × 104
213 12.1 2.33 × 104
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 5.91 8980
70.0 6.37 9670
80.0 7.27 1.11 × 104
90.0 8.18 1.24 × 104
100 9.09 1.38 × 104
133 12.1 1.84 × 104
Steel I Beam: W12 × 65 (Wide Flange 12 inch tall × 65 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
65.0 9.01 1.11 × 104
70.0 9.70 1.19 × 104
80.0 11.1 1.36 × 104
87.4 12.1 1.49 × 104
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