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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Aluminum I Beam » 6.00 × 4.692
Aluminum I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in three equal spans, we compute the displacement at the middle of the first and the third spans, and the maximum normal stress stress_max occuring at the second and third supports of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 25.5 in4) for the 6.00 × 4.692 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
  
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 1.72 × 10-5 5.96
5.00 1.84 × 10-5 6.35
6.00 2.21 × 10-5 7.62
7.00 2.57 × 10-5 8.89
8.00 2.94 × 10-5 10.2
9.00 3.31 × 10-5 11.4
10.0 3.68 × 10-5 12.7
20.0 7.35 × 10-5 25.4
30.0 1.10 × 10-4 38.1
40.0 1.47 × 10-4 50.8
50.0 1.84 × 10-4 63.5
60.0 2.21 × 10-4 76.2
70.0 2.57 × 10-4 88.9
80.0 2.94 × 10-4 102
90.0 3.31 × 10-4 114
100 3.68 × 10-4 127
200 7.35 × 10-4 254
300 0.00110 381
400 0.00147 508
500 0.00184 635
600 0.00221 762
700 0.00257 889
800 0.00294 1020
900 0.00331 1140
1000 0.00368 1270
2000 0.00735 2540
3000 0.0110 3810
4000 0.0147 5080
5000 0.0184 6350
6000 0.0221 7620
7000 0.0257 8890
8000 0.0294 1.02 × 104
9000 0.0331 1.14 × 104
1.00 × 104 0.0368 1.27 × 104
2.00 × 104 0.0735 2.54 × 104
3.00 × 104 0.110 3.81 × 104
4.00 × 104 0.147 5.08 × 104
5.00 × 104 0.184 6.35 × 104
5.99 × 104 0.220 7.61 × 104
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 1.33 × 10-4 16.6
5.00 1.42 × 10-4 17.6
6.00 1.70 × 10-4 21.2
7.00 1.99 × 10-4 24.7
8.00 2.27 × 10-4 28.2
9.00 2.55 × 10-4 31.8
10.0 2.84 × 10-4 35.3
20.0 5.67 × 10-4 70.6
30.0 8.51 × 10-4 106
40.0 0.00113 141
50.0 0.00142 176
60.0 0.00170 212
70.0 0.00199 247
80.0 0.00227 282
90.0 0.00255 318
100 0.00284 353
200 0.00567 706
300 0.00851 1060
400 0.0113 1410
500 0.0142 1760
600 0.0170 2120
700 0.0199 2470
800 0.0227 2820
900 0.0255 3180
1000 0.0284 3530
2000 0.0567 7060
3000 0.0851 1.06 × 104
4000 0.113 1.41 × 104
5000 0.142 1.76 × 104
6000 0.170 2.12 × 104
7000 0.199 2.47 × 104
8000 0.227 2.82 × 104
9000 0.255 3.18 × 104
1.00 × 104 0.284 3.53 × 104
2.00 × 104 0.567 7.06 × 104
2.16 × 104 0.612 7.61 × 104
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 0.00213 66.2
5.00 0.00227 70.6
6.00 0.00272 84.7
7.00 0.00318 98.8
8.00 0.00363 113
9.00 0.00408 127
10.0 0.00454 141
20.0 0.00908 282
30.0 0.0136 424
40.0 0.0182 565
50.0 0.0227 706
60.0 0.0272 847
70.0 0.0318 988
80.0 0.0363 1130
90.0 0.0408 1270
100 0.0454 1410
200 0.0908 2820
300 0.136 4240
400 0.182 5650
500 0.227 7060
600 0.272 8470
700 0.318 9880
800 0.363 1.13 × 104
900 0.408 1.27 × 104
1000 0.454 1.41 × 104
2000 0.908 2.82 × 104
3000 1.36 4.24 × 104
4000 1.82 5.65 × 104
5000 2.27 7.06 × 104
5390 2.45 7.61 × 104
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 0.0108 149
5.00 0.0115 159
6.00 0.0138 191
7.00 0.0161 222
8.00 0.0184 254
9.00 0.0207 286
10.0 0.0230 318
20.0 0.0460 635
30.0 0.0689 953
40.0 0.0919 1270
50.0 0.115 1590
60.0 0.138 1910
70.0 0.161 2220
80.0 0.184 2540
90.0 0.207 2860
100 0.230 3180
200 0.460 6350
300 0.689 9530
400 0.919 1.27 × 104
500 1.15 1.59 × 104
600 1.38 1.91 × 104
700 1.61 2.22 × 104
800 1.84 2.54 × 104
900 2.07 2.86 × 104
1000 2.30 3.18 × 104
2000 4.60 6.35 × 104
2400 5.51 7.61 × 104
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 0.0341 265
5.00 0.0363 282
6.00 0.0436 339
7.00 0.0508 395
8.00 0.0581 452
9.00 0.0654 508
10.0 0.0726 565
20.0 0.145 1130
30.0 0.218 1690
40.0 0.290 2260
50.0 0.363 2820
60.0 0.436 3390
70.0 0.508 3950
80.0 0.581 4520
90.0 0.654 5080
100 0.726 5650
200 1.45 1.13 × 104
300 2.18 1.69 × 104
400 2.90 2.26 × 104
500 3.63 2.82 × 104
600 4.36 3.39 × 104
700 5.08 3.95 × 104
800 5.81 4.52 × 104
826 6.00 4.67 × 104
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 0.0832 414
5.00 0.0886 441
6.00 0.106 529
7.00 0.124 618
8.00 0.142 706
9.00 0.160 794
10.0 0.177 882
20.0 0.355 1760
30.0 0.532 2650
40.0 0.709 3530
50.0 0.886 4410
60.0 1.06 5290
70.0 1.24 6180
80.0 1.42 7060
90.0 1.60 7940
100 1.77 8820
200 3.55 1.76 × 104
300 5.32 2.65 × 104
338 6.00 2.99 × 104
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 0.172 596
5.00 0.184 635
6.00 0.221 762
7.00 0.257 889
8.00 0.294 1020
9.00 0.331 1140
10.0 0.368 1270
20.0 0.735 2540
30.0 1.10 3810
40.0 1.47 5080
50.0 1.84 6350
60.0 2.21 7620
70.0 2.57 8890
80.0 2.94 1.02 × 104
90.0 3.31 1.14 × 104
100 3.68 1.27 × 104
163 6.00 2.07 × 104
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 0.545 1060
5.00 0.581 1130
6.00 0.697 1360
7.00 0.813 1580
8.00 0.930 1810
9.00 1.05 2030
10.0 1.16 2260
20.0 2.32 4520
30.0 3.49 6780
40.0 4.65 9040
50.0 5.81 1.13 × 104
51.6 6.00 1.17 × 104
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 1.33 1660
5.00 1.42 1760
6.00 1.70 2120
7.00 1.99 2470
8.00 2.27 2820
9.00 2.55 3180
10.0 2.84 3530
20.0 5.67 7060
21.2 6.00 7470
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 2.76 2380
5.00 2.94 2540
6.00 3.53 3050
7.00 4.12 3560
8.00 4.71 4070
9.00 5.29 4570
10.0 5.88 5080
10.2 6.00 5180
Aluminum I Beam: 6.00 × 4.692 (6.00 inch tall × 4.692 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
4.69 5.11 3250
5.00 5.45 3460
5.51 6.00 3810
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