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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three 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 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 = 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 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 4.28 × 10-6 2.96 20.0 7.34 × 10-6 5.07 30.0 1.10 × 10-5 7.61 40.0 1.47 × 10-5 10.1 50.0 1.83 × 10-5 12.7 60.0 2.20 × 10-5 15.2 70.0 2.57 × 10-5 17.7 80.0 2.93 × 10-5 20.3 90.0 3.30 × 10-5 22.8 100 3.67 × 10-5 25.4 200 7.34 × 10-5 50.7 300 1.10 × 10-4 76.1 400 1.47 × 10-4 101 500 1.83 × 10-4 127 600 2.20 × 10-4 152 700 2.57 × 10-4 177 800 2.93 × 10-4 203 900 3.30 × 10-4 228 1000 3.67 × 10-4 254 2000 7.34 × 10-4 507 3000 0.00110 761 4000 0.00147 1010 5000 0.00183 1270 6000 0.00220 1520 7000 0.00257 1770 8000 0.00293 2030 9000 0.00330 2280 1.00 × 104 0.00367 2540 2.00 × 104 0.00734 5070 3.00 × 104 0.0110 7610 4.00 × 104 0.0147 1.01 × 104 5.00 × 104 0.0183 1.27 × 104 6.00 × 104 0.0220 1.52 × 104 7.00 × 104 0.0257 1.77 × 104 8.00 × 104 0.0293 2.03 × 104 9.00 × 104 0.0330 2.28 × 104 1.00 × 105 0.0367 2.54 × 104 2.00 × 105 0.0734 5.07 × 104 3.00 × 105 0.110 7.61 × 104 3.00 × 105 0.110 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 3.30 × 10-5 8.22 20.0 5.66 × 10-5 14.1 30.0 8.49 × 10-5 21.1 40.0 1.13 × 10-4 28.2 50.0 1.42 × 10-4 35.2 60.0 1.70 × 10-4 42.3 70.0 1.98 × 10-4 49.3 80.0 2.26 × 10-4 56.3 90.0 2.55 × 10-4 63.4 100 2.83 × 10-4 70.4 200 5.66 × 10-4 141 300 8.49 × 10-4 211 400 0.00113 282 500 0.00142 352 600 0.00170 423 700 0.00198 493 800 0.00226 563 900 0.00255 634 1000 0.00283 704 2000 0.00566 1410 3000 0.00849 2110 4000 0.0113 2820 5000 0.0142 3520 6000 0.0170 4230 7000 0.0198 4930 8000 0.0226 5630 9000 0.0255 6340 1.00 × 104 0.0283 7040 2.00 × 104 0.0566 1.41 × 104 3.00 × 104 0.0849 2.11 × 104 4.00 × 104 0.113 2.82 × 104 5.00 × 104 0.142 3.52 × 104 6.00 × 104 0.170 4.23 × 104 7.00 × 104 0.198 4.93 × 104 8.00 × 104 0.226 5.63 × 104 9.00 × 104 0.255 6.34 × 104 1.00 × 105 0.283 7.04 × 104 1.08 × 105 0.306 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 5.29 × 10-4 32.9 20.0 9.06 × 10-4 56.3 30.0 0.00136 84.5 40.0 0.00181 113 50.0 0.00226 141 60.0 0.00272 169 70.0 0.00317 197 80.0 0.00362 225 90.0 0.00408 254 100 0.00453 282 200 0.00906 563 300 0.0136 845 400 0.0181 1130 500 0.0226 1410 600 0.0272 1690 700 0.0317 1970 800 0.0362 2250 900 0.0408 2540 1000 0.0453 2820 2000 0.0906 5630 3000 0.136 8450 4000 0.181 1.13 × 104 5000 0.226 1.41 × 104 6000 0.272 1.69 × 104 7000 0.317 1.97 × 104 8000 0.362 2.25 × 104 9000 0.408 2.54 × 104 1.00 × 104 0.453 2.82 × 104 2.00 × 104 0.906 5.63 × 104 2.70 × 104 1.22 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 0.00268 74.0 20.0 0.00459 127 30.0 0.00688 190 40.0 0.00917 254 50.0 0.0115 317 60.0 0.0138 380 70.0 0.0160 444 80.0 0.0183 507 90.0 0.0206 570 100 0.0229 634 200 0.0459 1270 300 0.0688 1900 400 0.0917 2540 500 0.115 3170 600 0.138 3800 700 0.160 4440 800 0.183 5070 900 0.206 5700 1000 0.229 6340 2000 0.459 1.27 × 104 3000 0.688 1.90 × 104 4000 0.917 2.54 × 104 5000 1.15 3.17 × 104 6000 1.38 3.80 × 104 7000 1.60 4.44 × 104 8000 1.83 5.07 × 104 9000 2.06 5.70 × 104 1.00 × 104 2.29 6.34 × 104 1.20 × 104 2.75 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 0.00846 132 20.0 0.0145 225 30.0 0.0217 338 40.0 0.0290 451 50.0 0.0362 563 60.0 0.0435 676 70.0 0.0507 789 80.0 0.0580 902 90.0 0.0652 1010 100 0.0725 1130 200 0.145 2250 300 0.217 3380 400 0.290 4510 500 0.362 5630 600 0.435 6760 700 0.507 7890 800 0.580 9020 900 0.652 1.01 × 104 1000 0.725 1.13 × 104 2000 1.45 2.25 × 104 3000 2.17 3.38 × 104 4000 2.90 4.51 × 104 5000 3.62 5.63 × 104 6000 4.35 6.76 × 104 6760 4.90 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 0.0206 206 20.0 0.0354 352 30.0 0.0531 528 40.0 0.0708 704 50.0 0.0884 880 60.0 0.106 1060 70.0 0.124 1230 80.0 0.142 1410 90.0 0.159 1580 100 0.177 1760 200 0.354 3520 300 0.531 5280 400 0.708 7040 500 0.884 8800 600 1.06 1.06 × 104 700 1.24 1.23 × 104 800 1.42 1.41 × 104 900 1.59 1.58 × 104 1000 1.77 1.76 × 104 2000 3.54 3.52 × 104 3000 5.31 5.28 × 104 4000 7.08 7.04 × 104 4320 7.65 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 0.0428 296 20.0 0.0734 507 30.0 0.110 761 40.0 0.147 1010 50.0 0.183 1270 60.0 0.220 1520 70.0 0.257 1770 80.0 0.293 2030 90.0 0.330 2280 100 0.367 2540 200 0.734 5070 300 1.10 7610 400 1.47 1.01 × 104 500 1.83 1.27 × 104 600 2.20 1.52 × 104 700 2.57 1.77 × 104 800 2.93 2.03 × 104 900 3.30 2.28 × 104 1000 3.67 2.54 × 104 2000 7.34 5.07 × 104 3000 11.0 7.61 × 104 3000 11.0 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 0.135 526 20.0 0.232 902 30.0 0.348 1350 40.0 0.464 1800 50.0 0.580 2250 60.0 0.696 2700 70.0 0.812 3160 80.0 0.927 3610 90.0 1.04 4060 100 1.16 4510 200 2.32 9020 300 3.48 1.35 × 104 400 4.64 1.80 × 104 500 5.80 2.25 × 104 600 6.96 2.70 × 104 700 8.12 3.16 × 104 800 9.27 3.61 × 104 900 10.4 4.06 × 104 1000 11.6 4.51 × 104 1690 19.6 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 0.330 822 20.0 0.566 1410 30.0 0.849 2110 40.0 1.13 2820 50.0 1.42 3520 60.0 1.70 4230 70.0 1.98 4930 80.0 2.26 5630 90.0 2.55 6340 100 2.83 7040 200 5.66 1.41 × 104 300 8.49 2.11 × 104 400 11.3 2.82 × 104 424 12.0 2.99 × 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 0.685 1180 20.0 1.17 2030 30.0 1.76 3040 40.0 2.35 4060 50.0 2.93 5070 60.0 3.52 6090 70.0 4.11 7100 80.0 4.70 8110 90.0 5.28 9130 100 5.87 1.01 × 104 200 11.7 2.03 × 104 204 12.0 2.07 × 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 1.27 1610 20.0 2.17 2760 30.0 3.26 4140 40.0 4.35 5520 50.0 5.44 6900 60.0 6.52 8280 70.0 7.61 9660 80.0 8.70 1.10 × 104 90.0 9.79 1.24 × 104 100 10.9 1.38 × 104 110 12.0 1.52 × 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 2.17 2100 20.0 3.71 3610 30.0 5.56 5410 40.0 7.42 7210 50.0 9.27 9020 60.0 11.1 1.08 × 104 64.7 12.0 1.17 × 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 3.47 2660 20.0 5.94 4560 30.0 8.91 6850 40.0 11.9 9130 40.4 12.0 9220
 Aluminum I Beam: 12.00 × 11.672 (12.00 inch tall × 11.672 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 11.7 5.29 3290 20.0 9.06 5630 26.5 12.0 7470
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