eFunda: Glossary: Beams: Simply Supported: Uniformly Distributed Load: Two Equal Spans: Aluminum I Beam: 12.00 × 11.672

Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Aluminum I Beam » 12.00 × 11.672

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 = 255.57 in⁴) for the 12.00 × 11.672 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 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 3.00 ft
(lbf/ft)	(in)	(psi)
11.7	3.28 × 10^-6	3.70
20.0	5.62 × 10^-6	6.34
30.0	8.43 × 10^-6	9.51
40.0	1.12 × 10^-5	12.7
50.0	1.40 × 10^-5	15.8
60.0	1.69 × 10^-5	19.0
70.0	1.97 × 10^-5	22.2
80.0	2.25 × 10^-5	25.4
90.0	2.53 × 10^-5	28.5
100	2.81 × 10^-5	31.7
200	5.62 × 10^-5	63.4
300	8.43 × 10^-5	95.1
400	1.12 × 10^-4	127
500	1.40 × 10^-4	158
600	1.69 × 10^-4	190
700	1.97 × 10^-4	222
800	2.25 × 10^-4	254
900	2.53 × 10^-4	285
1000	2.81 × 10^-4	317
2000	5.62 × 10^-4	634
3000	8.43 × 10^-4	951
4000	0.00112	1270
5000	0.00140	1580
6000	0.00169	1900
7000	0.00197	2220
8000	0.00225	2540
9000	0.00253	2850
1.00 × 10⁴	0.00281	3170
2.00 × 10⁴	0.00562	6340
3.00 × 10⁴	0.00843	9510
4.00 × 10⁴	0.0112	1.27 × 10⁴
5.00 × 10⁴	0.0140	1.58 × 10⁴
6.00 × 10⁴	0.0169	1.90 × 10⁴
7.00 × 10⁴	0.0197	2.22 × 10⁴
8.00 × 10⁴	0.0225	2.54 × 10⁴
9.00 × 10⁴	0.0253	2.85 × 10⁴
1.00 × 10⁵	0.0281	3.17 × 10⁴
2.00 × 10⁵	0.0562	6.34 × 10⁴
2.40 × 10⁵	0.0675	7.61 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 5.00 ft
(lbf/ft)	(in)	(psi)
11.7	2.53 × 10^-5	10.3
20.0	4.34 × 10^-5	17.6
30.0	6.50 × 10^-5	26.4
40.0	8.67 × 10^-5	35.2
50.0	1.08 × 10^-4	44.0
60.0	1.30 × 10^-4	52.8
70.0	1.52 × 10^-4	61.6
80.0	1.73 × 10^-4	70.4
90.0	1.95 × 10^-4	79.2
100	2.17 × 10^-4	88.0
200	4.34 × 10^-4	176
300	6.50 × 10^-4	264
400	8.67 × 10^-4	352
500	0.00108	440
600	0.00130	528
700	0.00152	616
800	0.00173	704
900	0.00195	792
1000	0.00217	880
2000	0.00434	1760
3000	0.00650	2640
4000	0.00867	3520
5000	0.0108	4400
6000	0.0130	5280
7000	0.0152	6160
8000	0.0173	7040
9000	0.0195	7920
1.00 × 10⁴	0.0217	8800
2.00 × 10⁴	0.0434	1.76 × 10⁴
3.00 × 10⁴	0.0650	2.64 × 10⁴
4.00 × 10⁴	0.0867	3.52 × 10⁴
5.00 × 10⁴	0.108	4.40 × 10⁴
6.00 × 10⁴	0.130	5.28 × 10⁴
7.00 × 10⁴	0.152	6.16 × 10⁴
8.00 × 10⁴	0.173	7.04 × 10⁴
8.65 × 10⁴	0.188	7.61 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 10.0 ft
(lbf/ft)	(in)	(psi)
11.7	4.05 × 10^-4	41.1
20.0	6.94 × 10^-4	70.4
30.0	0.00104	106
40.0	0.00139	141
50.0	0.00173	176
60.0	0.00208	211
70.0	0.00243	247
80.0	0.00277	282
90.0	0.00312	317
100	0.00347	352
200	0.00694	704
300	0.0104	1060
400	0.0139	1410
500	0.0173	1760
600	0.0208	2110
700	0.0243	2470
800	0.0277	2820
900	0.0312	3170
1000	0.0347	3520
2000	0.0694	7040
3000	0.104	1.06 × 10⁴
4000	0.139	1.41 × 10⁴
5000	0.173	1.76 × 10⁴
6000	0.208	2.11 × 10⁴
7000	0.243	2.47 × 10⁴
8000	0.277	2.82 × 10⁴
9000	0.312	3.17 × 10⁴
1.00 × 10⁴	0.347	3.52 × 10⁴
2.00 × 10⁴	0.694	7.04 × 10⁴
2.16 × 10⁴	0.750	7.61 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 15.0 ft
(lbf/ft)	(in)	(psi)
11.7	0.00205	92.5
20.0	0.00351	158
30.0	0.00527	238
40.0	0.00702	317
50.0	0.00878	396
60.0	0.0105	475
70.0	0.0123	555
80.0	0.0140	634
90.0	0.0158	713
100	0.0176	792
200	0.0351	1580
300	0.0527	2380
400	0.0702	3170
500	0.0878	3960
600	0.105	4750
700	0.123	5550
800	0.140	6340
900	0.158	7130
1000	0.176	7920
2000	0.351	1.58 × 10⁴
3000	0.527	2.38 × 10⁴
4000	0.702	3.17 × 10⁴
5000	0.878	3.96 × 10⁴
6000	1.05	4.75 × 10⁴
7000	1.23	5.55 × 10⁴
8000	1.40	6.34 × 10⁴
9000	1.58	7.13 × 10⁴
9610	1.69	7.61 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 20.0 ft
(lbf/ft)	(in)	(psi)
11.7	0.00648	164
20.0	0.0111	282
30.0	0.0166	423
40.0	0.0222	563
50.0	0.0277	704
60.0	0.0333	845
70.0	0.0388	986
80.0	0.0444	1130
90.0	0.0499	1270
100	0.0555	1410
200	0.111	2820
300	0.166	4230
400	0.222	5630
500	0.277	7040
600	0.333	8450
700	0.388	9860
800	0.444	1.13 × 10⁴
900	0.499	1.27 × 10⁴
1000	0.555	1.41 × 10⁴
2000	1.11	2.82 × 10⁴
3000	1.66	4.23 × 10⁴
4000	2.22	5.63 × 10⁴
5000	2.77	7.04 × 10⁴
5410	3.00	7.61 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 25.0 ft
(lbf/ft)	(in)	(psi)
11.7	0.0158	257
20.0	0.0271	440
30.0	0.0406	660
40.0	0.0542	880
50.0	0.0677	1100
60.0	0.0813	1320
70.0	0.0948	1540
80.0	0.108	1760
90.0	0.122	1980
100	0.135	2200
200	0.271	4400
300	0.406	6600
400	0.542	8800
500	0.677	1.10 × 10⁴
600	0.813	1.32 × 10⁴
700	0.948	1.54 × 10⁴
800	1.08	1.76 × 10⁴
900	1.22	1.98 × 10⁴
1000	1.35	2.20 × 10⁴
2000	2.71	4.40 × 10⁴
3000	4.06	6.60 × 10⁴
3460	4.69	7.61 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 30.0 ft
(lbf/ft)	(in)	(psi)
11.7	0.0328	370
20.0	0.0562	634
30.0	0.0843	951
40.0	0.112	1270
50.0	0.140	1580
60.0	0.169	1900
70.0	0.197	2220
80.0	0.225	2540
90.0	0.253	2850
100	0.281	3170
200	0.562	6340
300	0.843	9510
400	1.12	1.27 × 10⁴
500	1.40	1.58 × 10⁴
600	1.69	1.90 × 10⁴
700	1.97	2.22 × 10⁴
800	2.25	2.54 × 10⁴
900	2.53	2.85 × 10⁴
1000	2.81	3.17 × 10⁴
2000	5.62	6.34 × 10⁴
2400	6.75	7.61 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 40.0 ft
(lbf/ft)	(in)	(psi)
11.7	0.104	658
20.0	0.178	1130
30.0	0.266	1690
40.0	0.355	2250
50.0	0.444	2820
60.0	0.533	3380
70.0	0.622	3940
80.0	0.710	4510
90.0	0.799	5070
100	0.888	5630
200	1.78	1.13 × 10⁴
300	2.66	1.69 × 10⁴
400	3.55	2.25 × 10⁴
500	4.44	2.82 × 10⁴
600	5.33	3.38 × 10⁴
700	6.22	3.94 × 10⁴
800	7.10	4.51 × 10⁴
900	7.99	5.07 × 10⁴
1000	8.88	5.63 × 10⁴
1350	12.0	7.61 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 50.0 ft
(lbf/ft)	(in)	(psi)
11.7	0.253	1030
20.0	0.434	1760
30.0	0.650	2640
40.0	0.867	3520
50.0	1.08	4400
60.0	1.30	5280
70.0	1.52	6160
80.0	1.73	7040
90.0	1.95	7920
100	2.17	8800
200	4.34	1.76 × 10⁴
300	6.50	2.64 × 10⁴
400	8.67	3.52 × 10⁴
500	10.8	4.40 × 10⁴
554	12.0	4.87 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 60.0 ft
(lbf/ft)	(in)	(psi)
11.7	0.525	1480
20.0	0.899	2540
30.0	1.35	3800
40.0	1.80	5070
50.0	2.25	6340
60.0	2.70	7610
70.0	3.15	8870
80.0	3.60	1.01 × 10⁴
90.0	4.05	1.14 × 10⁴
100	4.50	1.27 × 10⁴
200	8.99	2.54 × 10⁴
267	12.0	3.38 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 70.0 ft
(lbf/ft)	(in)	(psi)
11.7	0.972	2010
20.0	1.67	3450
30.0	2.50	5180
40.0	3.33	6900
50.0	4.16	8630
60.0	5.00	1.04 × 10⁴
70.0	5.83	1.21 × 10⁴
80.0	6.66	1.38 × 10⁴
90.0	7.50	1.55 × 10⁴
100	8.33	1.73 × 10⁴
144	12.0	2.49 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 80.0 ft
(lbf/ft)	(in)	(psi)
11.7	1.66	2630
20.0	2.84	4510
30.0	4.26	6760
40.0	5.68	9020
50.0	7.10	1.13 × 10⁴
60.0	8.52	1.35 × 10⁴
70.0	9.95	1.58 × 10⁴
80.0	11.4	1.80 × 10⁴
84.5	12.0	1.90 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 90.0 ft
(lbf/ft)	(in)	(psi)
11.7	2.66	3330
20.0	4.55	5700
30.0	6.83	8560
40.0	9.10	1.14 × 10⁴
50.0	11.4	1.43 × 10⁴
52.7	12.0	1.50 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 100 ft
(lbf/ft)	(in)	(psi)
11.7	4.05	4110
20.0	6.94	7040
30.0	10.4	1.06 × 10⁴
34.6	12.0	1.22 × 10⁴

Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft)
L = 125 ft
(lbf/ft)	(in)	(psi)
11.7	9.88	6420
14.2	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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