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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Aluminum I Beam » 3.00 × 1.637
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 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 = 2.24 in4) for the 3.00 × 1.637 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: 3.00 × 1.637 (3.00 inch tall × 1.637 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 1.64 6.85 × 10-5 11.8 2.00 8.37 × 10-5 14.5 3.00 1.26 × 10-4 21.7 4.00 1.67 × 10-4 28.9 5.00 2.09 × 10-4 36.2 6.00 2.51 × 10-4 43.4 7.00 2.93 × 10-4 50.6 8.00 3.35 × 10-4 57.9 9.00 3.77 × 10-4 65.1 10.0 4.19 × 10-4 72.3 20.0 8.37 × 10-4 145 30.0 0.00126 217 40.0 0.00167 289 50.0 0.00209 362 60.0 0.00251 434 70.0 0.00293 506 80.0 0.00335 579 90.0 0.00377 651 100 0.00419 723 200 0.00837 1450 300 0.0126 2170 400 0.0167 2890 500 0.0209 3620 600 0.0251 4340 700 0.0293 5060 800 0.0335 5790 900 0.0377 6510 1000 0.0419 7230 2000 0.0837 1.45 × 104 3000 0.126 2.17 × 104 4000 0.167 2.89 × 104 5000 0.209 3.62 × 104 6000 0.251 4.34 × 104 7000 0.293 5.06 × 104 8000 0.335 5.79 × 104 9000 0.377 6.51 × 104 1.00 × 104 0.419 7.23 × 104 1.05 × 104 0.441 7.61 × 104
 Aluminum I Beam: 3.00 × 1.637 (3.00 inch tall × 1.637 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 1.64 5.29 × 10-4 32.9 2.00 6.46 × 10-4 40.2 3.00 9.69 × 10-4 60.3 4.00 0.00129 80.4 5.00 0.00161 100 6.00 0.00194 121 7.00 0.00226 141 8.00 0.00258 161 9.00 0.00291 181 10.0 0.00323 201 20.0 0.00646 402 30.0 0.00969 603 40.0 0.0129 804 50.0 0.0161 1000 60.0 0.0194 1210 70.0 0.0226 1410 80.0 0.0258 1610 90.0 0.0291 1810 100 0.0323 2010 200 0.0646 4020 300 0.0969 6030 400 0.129 8040 500 0.161 1.00 × 104 600 0.194 1.21 × 104 700 0.226 1.41 × 104 800 0.258 1.61 × 104 900 0.291 1.81 × 104 1000 0.323 2.01 × 104 2000 0.646 4.02 × 104 3000 0.969 6.03 × 104 3790 1.22 7.61 × 104
 Aluminum I Beam: 3.00 × 1.637 (3.00 inch tall × 1.637 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 1.64 0.00846 132 2.00 0.0103 161 3.00 0.0155 241 4.00 0.0207 321 5.00 0.0258 402 6.00 0.0310 482 7.00 0.0362 563 8.00 0.0413 643 9.00 0.0465 723 10.0 0.0517 804 20.0 0.103 1610 30.0 0.155 2410 40.0 0.207 3210 50.0 0.258 4020 60.0 0.310 4820 70.0 0.362 5620 80.0 0.413 6430 90.0 0.465 7230 100 0.517 8040 200 1.03 1.61 × 104 300 1.55 2.41 × 104 400 2.07 3.21 × 104 500 2.58 4.02 × 104 581 3.00 4.67 × 104
 Aluminum I Beam: 3.00 × 1.637 (3.00 inch tall × 1.637 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 1.64 0.0428 296 2.00 0.0523 362 3.00 0.0785 542 4.00 0.105 723 5.00 0.131 904 6.00 0.157 1080 7.00 0.183 1270 8.00 0.209 1450 9.00 0.235 1630 10.0 0.262 1810 20.0 0.523 3620 30.0 0.785 5420 40.0 1.05 7230 50.0 1.31 9040 60.0 1.57 1.08 × 104 70.0 1.83 1.27 × 104 80.0 2.09 1.45 × 104 90.0 2.35 1.63 × 104 100 2.62 1.81 × 104 115 3.00 2.07 × 104
 Aluminum I Beam: 3.00 × 1.637 (3.00 inch tall × 1.637 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 1.64 0.135 526 2.00 0.165 643 3.00 0.248 964 4.00 0.331 1290 5.00 0.413 1610 6.00 0.496 1930 7.00 0.579 2250 8.00 0.661 2570 9.00 0.744 2890 10.0 0.827 3210 20.0 1.65 6430 30.0 2.48 9640 36.3 3.00 1.17 × 104
 Aluminum I Beam: 3.00 × 1.637 (3.00 inch tall × 1.637 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 1.64 0.330 822 2.00 0.404 1000 3.00 0.605 1510 4.00 0.807 2010 5.00 1.01 2510 6.00 1.21 3010 7.00 1.41 3520 8.00 1.61 4020 9.00 1.82 4520 10.0 2.02 5020 14.9 3.00 7470
 Aluminum I Beam: 3.00 × 1.637 (3.00 inch tall × 1.637 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 1.64 0.685 1180 2.00 0.837 1450 3.00 1.26 2170 4.00 1.67 2890 5.00 2.09 3620 6.00 2.51 4340 7.00 2.93 5060 7.17 3.00 5180
 Aluminum I Beam: 3.00 × 1.637 (3.00 inch tall × 1.637 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 1.64 2.17 2100 2.00 2.65 2570 2.27 3.00 2920
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