engineering fundamentals
Aluminum I Beam: 12.00 × 14.292
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Aluminum I Beam » 12.00 × 14.292
Aluminum 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 = 317.33 in4) for the 12.00 × 14.292 Aluminum I Beam and the typical Young's modulus (E = 1.015 × 107 psi) of aluminum alloys. Note that the typical yielding stress Yield of aluminum alloys can range from 4061 to 7.614 × 104 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
   
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 3.23 × 10-6 3.65
20.0 4.53 × 10-6 5.11
30.0 6.79 × 10-6 7.66
40.0 9.05 × 10-6 10.2
50.0 1.13 × 10-5 12.8
60.0 1.36 × 10-5 15.3
70.0 1.58 × 10-5 17.9
80.0 1.81 × 10-5 20.4
90.0 2.04 × 10-5 23.0
100 2.26 × 10-5 25.5
200 4.53 × 10-5 51.1
300 6.79 × 10-5 76.6
400 9.05 × 10-5 102
500 1.13 × 10-4 128
600 1.36 × 10-4 153
700 1.58 × 10-4 179
800 1.81 × 10-4 204
900 2.04 × 10-4 230
1000 2.26 × 10-4 255
2000 4.53 × 10-4 511
3000 6.79 × 10-4 766
4000 9.05 × 10-4 1020
5000 0.00113 1280
6000 0.00136 1530
7000 0.00158 1790
8000 0.00181 2040
9000 0.00204 2300
1.00 × 104 0.00226 2550
2.00 × 104 0.00453 5110
3.00 × 104 0.00679 7660
4.00 × 104 0.00905 1.02 × 104
5.00 × 104 0.0113 1.28 × 104
6.00 × 104 0.0136 1.53 × 104
7.00 × 104 0.0158 1.79 × 104
8.00 × 104 0.0181 2.04 × 104
9.00 × 104 0.0204 2.30 × 104
1.00 × 105 0.0226 2.55 × 104
2.00 × 105 0.0453 5.11 × 104
2.98 × 105 0.0675 7.61 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 2.50 × 10-5 10.1
20.0 3.49 × 10-5 14.2
30.0 5.24 × 10-5 21.3
40.0 6.98 × 10-5 28.4
50.0 8.73 × 10-5 35.5
60.0 1.05 × 10-4 42.5
70.0 1.22 × 10-4 49.6
80.0 1.40 × 10-4 56.7
90.0 1.57 × 10-4 63.8
100 1.75 × 10-4 70.9
200 3.49 × 10-4 142
300 5.24 × 10-4 213
400 6.98 × 10-4 284
500 8.73 × 10-4 355
600 0.00105 425
700 0.00122 496
800 0.00140 567
900 0.00157 638
1000 0.00175 709
2000 0.00349 1420
3000 0.00524 2130
4000 0.00698 2840
5000 0.00873 3550
6000 0.0105 4250
7000 0.0122 4960
8000 0.0140 5670
9000 0.0157 6380
1.00 × 104 0.0175 7090
2.00 × 104 0.0349 1.42 × 104
3.00 × 104 0.0524 2.13 × 104
4.00 × 104 0.0698 2.84 × 104
5.00 × 104 0.0873 3.55 × 104
6.00 × 104 0.105 4.25 × 104
7.00 × 104 0.122 4.96 × 104
8.00 × 104 0.140 5.67 × 104
9.00 × 104 0.157 6.38 × 104
1.00 × 105 0.175 7.09 × 104
1.07 × 105 0.188 7.61 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 3.99 × 10-4 40.5
20.0 5.59 × 10-4 56.7
30.0 8.38 × 10-4 85.1
40.0 0.00112 113
50.0 0.00140 142
60.0 0.00168 170
70.0 0.00196 199
80.0 0.00223 227
90.0 0.00251 255
100 0.00279 284
200 0.00559 567
300 0.00838 851
400 0.0112 1130
500 0.0140 1420
600 0.0168 1700
700 0.0196 1990
800 0.0223 2270
900 0.0251 2550
1000 0.0279 2840
2000 0.0559 5670
3000 0.0838 8510
4000 0.112 1.13 × 104
5000 0.140 1.42 × 104
6000 0.168 1.70 × 104
7000 0.196 1.99 × 104
8000 0.223 2.27 × 104
9000 0.251 2.55 × 104
1.00 × 104 0.279 2.84 × 104
2.00 × 104 0.559 5.67 × 104
2.68 × 104 0.750 7.61 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 0.00202 91.2
20.0 0.00283 128
30.0 0.00424 191
40.0 0.00566 255
50.0 0.00707 319
60.0 0.00849 383
70.0 0.00990 447
80.0 0.0113 511
90.0 0.0127 574
100 0.0141 638
200 0.0283 1280
300 0.0424 1910
400 0.0566 2550
500 0.0707 3190
600 0.0849 3830
700 0.0990 4470
800 0.113 5110
900 0.127 5740
1000 0.141 6380
2000 0.283 1.28 × 104
3000 0.424 1.91 × 104
4000 0.566 2.55 × 104
5000 0.707 3.19 × 104
6000 0.849 3.83 × 104
7000 0.990 4.47 × 104
8000 1.13 5.11 × 104
9000 1.27 5.74 × 104
1.00 × 104 1.41 6.38 × 104
1.19 × 104 1.69 7.61 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 0.00639 162
20.0 0.00894 227
30.0 0.0134 340
40.0 0.0179 454
50.0 0.0223 567
60.0 0.0268 681
70.0 0.0313 794
80.0 0.0358 908
90.0 0.0402 1020
100 0.0447 1130
200 0.0894 2270
300 0.134 3400
400 0.179 4540
500 0.223 5670
600 0.268 6810
700 0.313 7940
800 0.358 9080
900 0.402 1.02 × 104
1000 0.447 1.13 × 104
2000 0.894 2.27 × 104
3000 1.34 3.40 × 104
4000 1.79 4.54 × 104
5000 2.23 5.67 × 104
6000 2.68 6.81 × 104
6710 3.00 7.61 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 0.0156 253
20.0 0.0218 355
30.0 0.0327 532
40.0 0.0436 709
50.0 0.0546 886
60.0 0.0655 1060
70.0 0.0764 1240
80.0 0.0873 1420
90.0 0.0982 1600
100 0.109 1770
200 0.218 3550
300 0.327 5320
400 0.436 7090
500 0.546 8860
600 0.655 1.06 × 104
700 0.764 1.24 × 104
800 0.873 1.42 × 104
900 0.982 1.60 × 104
1000 1.09 1.77 × 104
2000 2.18 3.55 × 104
3000 3.27 5.32 × 104
4000 4.36 7.09 × 104
4300 4.69 7.61 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 0.0323 365
20.0 0.0453 511
30.0 0.0679 766
40.0 0.0905 1020
50.0 0.113 1280
60.0 0.136 1530
70.0 0.158 1790
80.0 0.181 2040
90.0 0.204 2300
100 0.226 2550
200 0.453 5110
300 0.679 7660
400 0.905 1.02 × 104
500 1.13 1.28 × 104
600 1.36 1.53 × 104
700 1.58 1.79 × 104
800 1.81 2.04 × 104
900 2.04 2.30 × 104
1000 2.26 2.55 × 104
2000 4.53 5.11 × 104
2980 6.75 7.61 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 0.102 649
20.0 0.143 908
30.0 0.215 1360
40.0 0.286 1820
50.0 0.358 2270
60.0 0.429 2720
70.0 0.501 3180
80.0 0.572 3630
90.0 0.644 4080
100 0.715 4540
200 1.43 9080
300 2.15 1.36 × 104
400 2.86 1.82 × 104
500 3.58 2.27 × 104
600 4.29 2.72 × 104
700 5.01 3.18 × 104
800 5.72 3.63 × 104
900 6.44 4.08 × 104
1000 7.15 4.54 × 104
1680 12.0 7.61 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 0.250 1010
20.0 0.349 1420
30.0 0.524 2130
40.0 0.698 2840
50.0 0.873 3550
60.0 1.05 4250
70.0 1.22 4960
80.0 1.40 5670
90.0 1.57 6380
100 1.75 7090
200 3.49 1.42 × 104
300 5.24 2.13 × 104
400 6.98 2.84 × 104
500 8.73 3.55 × 104
600 10.5 4.25 × 104
687 12.0 4.87 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 0.517 1460
20.0 0.724 2040
30.0 1.09 3060
40.0 1.45 4080
50.0 1.81 5110
60.0 2.17 6130
70.0 2.53 7150
80.0 2.90 8170
90.0 3.26 9190
100 3.62 1.02 × 104
200 7.24 2.04 × 104
300 10.9 3.06 × 104
331 12.0 3.38 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 0.959 1990
20.0 1.34 2780
30.0 2.01 4170
40.0 2.68 5560
50.0 3.35 6950
60.0 4.02 8340
70.0 4.70 9730
80.0 5.37 1.11 × 104
90.0 6.04 1.25 × 104
100 6.71 1.39 × 104
179 12.0 2.49 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 1.64 2590
20.0 2.29 3630
30.0 3.43 5450
40.0 4.58 7260
50.0 5.72 9080
60.0 6.87 1.09 × 104
70.0 8.01 1.27 × 104
80.0 9.15 1.45 × 104
90.0 10.3 1.63 × 104
100 11.4 1.82 × 104
105 12.0 1.90 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 2.62 3280
20.0 3.67 4590
30.0 5.50 6890
40.0 7.33 9190
50.0 9.16 1.15 × 104
60.0 11.0 1.38 × 104
65.5 12.0 1.50 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 100 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 3.99 4050
20.0 5.59 5670
30.0 8.38 8510
40.0 11.2 1.13 × 104
43.0 12.0 1.22 × 104
Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 125 ft
P (lbf/ft) w_mid (in) stress_max (psi)
14.3 9.75 6330
17.6 12.0 7800
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