eFunda: Glossary: Beams: Simply Supported: Uniformly Distributed Load: Two Equal Spans: Aluminum I Beam: 12.00 × 14.292

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 (I_xx = 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.

Aluminum I Beam: 12.00 × 14.292 (12.00 inch tall × 14.292 lbf/ft)
L = 3.00 ft
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(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
(lbf/ft)	(in)	(psi)
14.3	9.75	6330
17.6	12.0	7800

Additional Information

Area properties of Aluminum I-Beams

Properties of Common Aluminum Alloys

Beam Equations and Euler-Bernoulli Beam Theory

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