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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four Equal Spans » Aluminum I Beam » 8.00 × 6.181
Aluminum I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in four equal spans, we compute the displacement at the middle of the first and fourth spans, and the maximum normal stress occuring at the second and fourth supports of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 59.69 in4) for the 8.00 × 6.181 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: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 6.18 8.99 × 10-6 4.79 7.00 1.02 × 10-5 5.43 8.00 1.16 × 10-5 6.20 9.00 1.31 × 10-5 6.98 10.0 1.46 × 10-5 7.75 20.0 2.91 × 10-5 15.5 30.0 4.37 × 10-5 23.3 40.0 5.82 × 10-5 31.0 50.0 7.28 × 10-5 38.8 60.0 8.73 × 10-5 46.5 70.0 1.02 × 10-4 54.3 80.0 1.16 × 10-4 62.0 90.0 1.31 × 10-4 69.8 100 1.46 × 10-4 77.5 200 2.91 × 10-4 155 300 4.37 × 10-4 233 400 5.82 × 10-4 310 500 7.28 × 10-4 388 600 8.73 × 10-4 465 700 0.00102 543 800 0.00116 620 900 0.00131 698 1000 0.00146 775 2000 0.00291 1550 3000 0.00437 2330 4000 0.00582 3100 5000 0.00728 3880 6000 0.00873 4650 7000 0.0102 5430 8000 0.0116 6200 9000 0.0131 6980 1.00 × 104 0.0146 7750 2.00 × 104 0.0291 1.55 × 104 3.00 × 104 0.0437 2.33 × 104 4.00 × 104 0.0582 3.10 × 104 5.00 × 104 0.0728 3.88 × 104 6.00 × 104 0.0873 4.65 × 104 7.00 × 104 0.102 5.43 × 104 8.00 × 104 0.116 6.20 × 104 9.00 × 104 0.131 6.98 × 104 9.82 × 104 0.143 7.61 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 6.18 6.94 × 10-5 13.3 7.00 7.86 × 10-5 15.1 8.00 8.98 × 10-5 17.2 9.00 1.01 × 10-4 19.4 10.0 1.12 × 10-4 21.5 20.0 2.25 × 10-4 43.1 30.0 3.37 × 10-4 64.6 40.0 4.49 × 10-4 86.1 50.0 5.61 × 10-4 108 60.0 6.74 × 10-4 129 70.0 7.86 × 10-4 151 80.0 8.98 × 10-4 172 90.0 0.00101 194 100 0.00112 215 200 0.00225 431 300 0.00337 646 400 0.00449 861 500 0.00561 1080 600 0.00674 1290 700 0.00786 1510 800 0.00898 1720 900 0.0101 1940 1000 0.0112 2150 2000 0.0225 4310 3000 0.0337 6460 4000 0.0449 8610 5000 0.0561 1.08 × 104 6000 0.0674 1.29 × 104 7000 0.0786 1.51 × 104 8000 0.0898 1.72 × 104 9000 0.101 1.94 × 104 1.00 × 104 0.112 2.15 × 104 2.00 × 104 0.225 4.31 × 104 3.00 × 104 0.337 6.46 × 104 3.54 × 104 0.397 7.61 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 6.18 0.00111 53.2 7.00 0.00126 60.3 8.00 0.00144 68.9 9.00 0.00162 77.5 10.0 0.00180 86.1 20.0 0.00359 172 30.0 0.00539 258 40.0 0.00719 344 50.0 0.00898 431 60.0 0.0108 517 70.0 0.0126 603 80.0 0.0144 689 90.0 0.0162 775 100 0.0180 861 200 0.0359 1720 300 0.0539 2580 400 0.0719 3440 500 0.0898 4310 600 0.108 5170 700 0.126 6030 800 0.144 6890 900 0.162 7750 1000 0.180 8610 2000 0.359 1.72 × 104 3000 0.539 2.58 × 104 4000 0.719 3.44 × 104 5000 0.898 4.31 × 104 6000 1.08 5.17 × 104 7000 1.26 6.03 × 104 8000 1.44 6.89 × 104 8840 1.59 7.61 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 6.18 0.00562 120 7.00 0.00637 136 8.00 0.00728 155 9.00 0.00818 174 10.0 0.00909 194 20.0 0.0182 388 30.0 0.0273 581 40.0 0.0364 775 50.0 0.0455 969 60.0 0.0546 1160 70.0 0.0637 1360 80.0 0.0728 1550 90.0 0.0818 1740 100 0.0909 1940 200 0.182 3880 300 0.273 5810 400 0.364 7750 500 0.455 9690 600 0.546 1.16 × 104 700 0.637 1.36 × 104 800 0.728 1.55 × 104 900 0.818 1.74 × 104 1000 0.909 1.94 × 104 2000 1.82 3.88 × 104 3000 2.73 5.81 × 104 3930 3.57 7.61 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 6.18 0.0178 213 7.00 0.0201 241 8.00 0.0230 276 9.00 0.0259 310 10.0 0.0287 344 20.0 0.0575 689 30.0 0.0862 1030 40.0 0.115 1380 50.0 0.144 1720 60.0 0.172 2070 70.0 0.201 2410 80.0 0.230 2760 90.0 0.259 3100 100 0.287 3440 200 0.575 6890 300 0.862 1.03 × 104 400 1.15 1.38 × 104 500 1.44 1.72 × 104 600 1.72 2.07 × 104 700 2.01 2.41 × 104 800 2.30 2.76 × 104 900 2.59 3.10 × 104 1000 2.87 3.44 × 104 2000 5.75 6.89 × 104 2210 6.35 7.61 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 6.18 0.0434 333 7.00 0.0491 377 8.00 0.0561 431 9.00 0.0632 484 10.0 0.0702 538 20.0 0.140 1080 30.0 0.211 1610 40.0 0.281 2150 50.0 0.351 2690 60.0 0.421 3230 70.0 0.491 3770 80.0 0.561 4310 90.0 0.632 4840 100 0.702 5380 200 1.40 1.08 × 104 300 2.11 1.61 × 104 400 2.81 2.15 × 104 500 3.51 2.69 × 104 600 4.21 3.23 × 104 700 4.91 3.77 × 104 800 5.61 4.31 × 104 900 6.32 4.84 × 104 1000 7.02 5.38 × 104 1410 9.93 7.61 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 6.18 0.0899 479 7.00 0.102 543 8.00 0.116 620 9.00 0.131 698 10.0 0.146 775 20.0 0.291 1550 30.0 0.437 2330 40.0 0.582 3100 50.0 0.728 3880 60.0 0.873 4650 70.0 1.02 5430 80.0 1.16 6200 90.0 1.31 6980 100 1.46 7750 200 2.91 1.55 × 104 300 4.37 2.33 × 104 400 5.82 3.10 × 104 500 7.28 3.88 × 104 550 8.00 4.26 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 6.18 0.284 852 7.00 0.322 965 8.00 0.368 1100 9.00 0.414 1240 10.0 0.460 1380 20.0 0.920 2760 30.0 1.38 4130 40.0 1.84 5510 50.0 2.30 6890 60.0 2.76 8270 70.0 3.22 9650 80.0 3.68 1.10 × 104 90.0 4.14 1.24 × 104 100 4.60 1.38 × 104 174 8.00 2.40 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 6.18 0.694 1330 7.00 0.786 1510 8.00 0.898 1720 9.00 1.01 1940 10.0 1.12 2150 20.0 2.25 4310 30.0 3.37 6460 40.0 4.49 8610 50.0 5.61 1.08 × 104 60.0 6.74 1.29 × 104 70.0 7.86 1.51 × 104 71.3 8.00 1.53 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 6.18 1.44 1920 7.00 1.63 2170 8.00 1.86 2480 9.00 2.10 2790 10.0 2.33 3100 20.0 4.66 6200 30.0 6.98 9300 34.4 8.00 1.07 × 104
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 6.18 2.67 2610 7.00 3.02 2950 8.00 3.45 3380 9.00 3.88 3800 10.0 4.31 4220 18.5 8.00 7830
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 6.18 4.55 3410 7.00 5.15 3860 8.00 5.89 4410 9.00 6.62 4960 10.0 7.36 5510 10.9 8.00 5990
 Aluminum I Beam: 8.00 × 6.181 (8.00 inch tall × 6.181 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 6.18 7.29 4310 6.79 8.00 4740
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