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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Aluminum I Beam » 4.00 × 2.311
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 and the maximum normal stress 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 = 5.62 in4) for the 4.00 × 2.311 Aluminum I Beam and the typical Young's modulus (E = 1.015 × 107 psi) of aluminum alloys. Note that the typical yielding stress 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: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 2.31 2.95 × 10-5 11.1 3.00 3.83 × 10-5 14.4 4.00 5.11 × 10-5 19.2 5.00 6.39 × 10-5 24.0 6.00 7.67 × 10-5 28.8 7.00 8.94 × 10-5 33.6 8.00 1.02 × 10-4 38.4 9.00 1.15 × 10-4 43.2 10.0 1.28 × 10-4 48.0 20.0 2.56 × 10-4 96.1 30.0 3.83 × 10-4 144 40.0 5.11 × 10-4 192 50.0 6.39 × 10-4 240 60.0 7.67 × 10-4 288 70.0 8.94 × 10-4 336 80.0 0.00102 384 90.0 0.00115 432 100 0.00128 480 200 0.00256 961 300 0.00383 1440 400 0.00511 1920 500 0.00639 2400 600 0.00767 2880 700 0.00894 3360 800 0.0102 3840 900 0.0115 4320 1000 0.0128 4800 2000 0.0256 9610 3000 0.0383 1.44 × 104 4000 0.0511 1.92 × 104 5000 0.0639 2.40 × 104 6000 0.0767 2.88 × 104 7000 0.0894 3.36 × 104 8000 0.102 3.84 × 104 9000 0.115 4.32 × 104 1.00 × 104 0.128 4.80 × 104 1.58 × 104 0.202 7.61 × 104
 Aluminum I Beam: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 2.31 2.28 × 10-4 30.8 3.00 2.96 × 10-4 40.0 4.00 3.94 × 10-4 53.4 5.00 4.93 × 10-4 66.7 6.00 5.92 × 10-4 80.1 7.00 6.90 × 10-4 93.4 8.00 7.89 × 10-4 107 9.00 8.87 × 10-4 120 10.0 9.86 × 10-4 133 20.0 0.00197 267 30.0 0.00296 400 40.0 0.00394 534 50.0 0.00493 667 60.0 0.00592 801 70.0 0.00690 934 80.0 0.00789 1070 90.0 0.00887 1200 100 0.00986 1330 200 0.0197 2670 300 0.0296 4000 400 0.0394 5340 500 0.0493 6670 600 0.0592 8010 700 0.0690 9340 800 0.0789 1.07 × 104 900 0.0887 1.20 × 104 1000 0.0986 1.33 × 104 2000 0.197 2.67 × 104 3000 0.296 4.00 × 104 4000 0.394 5.34 × 104 5000 0.493 6.67 × 104 5710 0.563 7.61 × 104
 Aluminum I Beam: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 2.31 0.00365 123 3.00 0.00473 160 4.00 0.00631 214 5.00 0.00789 267 6.00 0.00946 320 7.00 0.0110 374 8.00 0.0126 427 9.00 0.0142 480 10.0 0.0158 534 20.0 0.0315 1070 30.0 0.0473 1600 40.0 0.0631 2140 50.0 0.0789 2670 60.0 0.0946 3200 70.0 0.110 3740 80.0 0.126 4270 90.0 0.142 4800 100 0.158 5340 200 0.315 1.07 × 104 300 0.473 1.60 × 104 400 0.631 2.14 × 104 500 0.789 2.67 × 104 600 0.946 3.20 × 104 700 1.10 3.74 × 104 800 1.26 4.27 × 104 900 1.42 4.80 × 104 1000 1.58 5.34 × 104 1430 2.25 7.61 × 104
 Aluminum I Beam: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 2.31 0.0185 278 3.00 0.0240 360 4.00 0.0319 480 5.00 0.0399 601 6.00 0.0479 721 7.00 0.0559 841 8.00 0.0639 961 9.00 0.0719 1080 10.0 0.0799 1200 20.0 0.160 2400 30.0 0.240 3600 40.0 0.319 4800 50.0 0.399 6010 60.0 0.479 7210 70.0 0.559 8410 80.0 0.639 9610 90.0 0.719 1.08 × 104 100 0.799 1.20 × 104 200 1.60 2.40 × 104 300 2.40 3.60 × 104 400 3.19 4.80 × 104 500 3.99 6.01 × 104 501 4.00 6.02 × 104
 Aluminum I Beam: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 2.31 0.0583 493 3.00 0.0757 641 4.00 0.101 854 5.00 0.126 1070 6.00 0.151 1280 7.00 0.177 1490 8.00 0.202 1710 9.00 0.227 1920 10.0 0.252 2140 20.0 0.505 4270 30.0 0.757 6410 40.0 1.01 8540 50.0 1.26 1.07 × 104 60.0 1.51 1.28 × 104 70.0 1.77 1.49 × 104 80.0 2.02 1.71 × 104 90.0 2.27 1.92 × 104 100 2.52 2.14 × 104 158 4.00 3.38 × 104
 Aluminum I Beam: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 2.31 0.142 771 3.00 0.185 1000 4.00 0.246 1330 5.00 0.308 1670 6.00 0.370 2000 7.00 0.431 2340 8.00 0.493 2670 9.00 0.555 3000 10.0 0.616 3340 20.0 1.23 6670 30.0 1.85 1.00 × 104 40.0 2.46 1.33 × 104 50.0 3.08 1.67 × 104 60.0 3.70 2.00 × 104 64.9 4.00 2.17 × 104
 Aluminum I Beam: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 2.31 0.295 1110 3.00 0.383 1440 4.00 0.511 1920 5.00 0.639 2400 6.00 0.767 2880 7.00 0.894 3360 8.00 1.02 3840 9.00 1.15 4320 10.0 1.28 4800 20.0 2.56 9610 30.0 3.83 1.44 × 104 31.3 4.00 1.50 × 104
 Aluminum I Beam: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 2.31 0.933 1970 3.00 1.21 2560 4.00 1.62 3420 5.00 2.02 4270 6.00 2.42 5120 7.00 2.83 5980 8.00 3.23 6830 9.00 3.63 7690 9.91 4.00 8460
 Aluminum I Beam: 4.00 × 2.311 (4.00 inch tall × 2.311 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 2.31 2.28 3080 3.00 2.96 4000 4.00 3.94 5340 4.06 4.00 5410
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