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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » S Section Steel I Beam » S18 × 54.7

For a simply supported beam in a single span, the maximum displacement and the maximum normal stress occur at the center of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 804 in4) for the S18 × 54.7 S Section Steel I Beam and the typical Young's modulus (E = 3.046 × 107 psi) of steels. Note that the typical yielding stress of steels can range from 1.015 × 104 to 2.970 × 105 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.

 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 54.7 4.07 × 10-6 8.27 60.0 4.47 × 10-6 9.07 70.0 5.21 × 10-6 10.6 80.0 5.95 × 10-6 12.1 90.0 6.70 × 10-6 13.6 100 7.44 × 10-6 15.1 200 1.49 × 10-5 30.2 300 2.23 × 10-5 45.3 400 2.98 × 10-5 60.4 500 3.72 × 10-5 75.6 600 4.47 × 10-5 90.7 700 5.21 × 10-5 106 800 5.95 × 10-5 121 900 6.70 × 10-5 136 1000 7.44 × 10-5 151 2000 1.49 × 10-4 302 3000 2.23 × 10-4 453 4000 2.98 × 10-4 604 5000 3.72 × 10-4 756 6000 4.47 × 10-4 907 7000 5.21 × 10-4 1060 8000 5.95 × 10-4 1210 9000 6.70 × 10-4 1360 1.00 × 104 7.44 × 10-4 1510 2.00 × 104 0.00149 3020 3.00 × 104 0.00223 4530 4.00 × 104 0.00298 6040 5.00 × 104 0.00372 7560 6.00 × 104 0.00447 9070 7.00 × 104 0.00521 1.06 × 104 8.00 × 104 0.00595 1.21 × 104 9.00 × 104 0.00670 1.36 × 104 1.00 × 105 0.00744 1.51 × 104 2.00 × 105 0.0149 3.02 × 104 3.00 × 105 0.0223 4.53 × 104 4.00 × 105 0.0298 6.04 × 104 5.00 × 105 0.0372 7.56 × 104 6.00 × 105 0.0447 9.07 × 104 7.00 × 105 0.0521 1.06 × 105 8.00 × 105 0.0595 1.21 × 105 9.00 × 105 0.0670 1.36 × 105 1.00 × 106 0.0744 1.51 × 105 1.97 × 106 0.146 2.97 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 54.7 3.14 × 10-5 23.0 60.0 3.45 × 10-5 25.2 70.0 4.02 × 10-5 29.4 80.0 4.59 × 10-5 33.6 90.0 5.17 × 10-5 37.8 100 5.74 × 10-5 42.0 200 1.15 × 10-4 84.0 300 1.72 × 10-4 126 400 2.30 × 10-4 168 500 2.87 × 10-4 210 600 3.45 × 10-4 252 700 4.02 × 10-4 294 800 4.59 × 10-4 336 900 5.17 × 10-4 378 1000 5.74 × 10-4 420 2000 0.00115 840 3000 0.00172 1260 4000 0.00230 1680 5000 0.00287 2100 6000 0.00345 2520 7000 0.00402 2940 8000 0.00459 3360 9000 0.00517 3780 1.00 × 104 0.00574 4200 2.00 × 104 0.0115 8400 3.00 × 104 0.0172 1.26 × 104 4.00 × 104 0.0230 1.68 × 104 5.00 × 104 0.0287 2.10 × 104 6.00 × 104 0.0345 2.52 × 104 7.00 × 104 0.0402 2.94 × 104 8.00 × 104 0.0459 3.36 × 104 9.00 × 104 0.0517 3.78 × 104 1.00 × 105 0.0574 4.20 × 104 2.00 × 105 0.115 8.40 × 104 3.00 × 105 0.172 1.26 × 105 4.00 × 105 0.230 1.68 × 105 5.00 × 105 0.287 2.10 × 105 6.00 × 105 0.345 2.52 × 105 7.00 × 105 0.402 2.94 × 105 7.08 × 105 0.406 2.97 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 54.7 5.03 × 10-4 91.8 60.0 5.51 × 10-4 101 70.0 6.43 × 10-4 118 80.0 7.35 × 10-4 134 90.0 8.27 × 10-4 151 100 9.19 × 10-4 168 200 0.00184 336 300 0.00276 504 400 0.00368 672 500 0.00459 840 600 0.00551 1010 700 0.00643 1180 800 0.00735 1340 900 0.00827 1510 1000 0.00919 1680 2000 0.0184 3360 3000 0.0276 5040 4000 0.0368 6720 5000 0.0459 8400 6000 0.0551 1.01 × 104 7000 0.0643 1.18 × 104 8000 0.0735 1.34 × 104 9000 0.0827 1.51 × 104 1.00 × 104 0.0919 1.68 × 104 2.00 × 104 0.184 3.36 × 104 3.00 × 104 0.276 5.04 × 104 4.00 × 104 0.368 6.72 × 104 5.00 × 104 0.459 8.40 × 104 6.00 × 104 0.551 1.01 × 105 7.00 × 104 0.643 1.18 × 105 8.00 × 104 0.735 1.34 × 105 9.00 × 104 0.827 1.51 × 105 1.00 × 105 0.919 1.68 × 105 1.77 × 105 1.63 2.97 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 54.7 0.00254 207 60.0 0.00279 227 70.0 0.00326 264 80.0 0.00372 302 90.0 0.00419 340 100 0.00465 378 200 0.00930 756 300 0.0140 1130 400 0.0186 1510 500 0.0233 1890 600 0.0279 2270 700 0.0326 2640 800 0.0372 3020 900 0.0419 3400 1000 0.0465 3780 2000 0.0930 7560 3000 0.140 1.13 × 104 4000 0.186 1.51 × 104 5000 0.233 1.89 × 104 6000 0.279 2.27 × 104 7000 0.326 2.64 × 104 8000 0.372 3.02 × 104 9000 0.419 3.40 × 104 1.00 × 104 0.465 3.78 × 104 2.00 × 104 0.930 7.56 × 104 3.00 × 104 1.40 1.13 × 105 4.00 × 104 1.86 1.51 × 105 5.00 × 104 2.33 1.89 × 105 6.00 × 104 2.79 2.27 × 105 7.00 × 104 3.26 2.64 × 105 7.86 × 104 3.66 2.97 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 54.7 0.00804 367 60.0 0.00882 403 70.0 0.0103 470 80.0 0.0118 537 90.0 0.0132 604 100 0.0147 672 200 0.0294 1340 300 0.0441 2010 400 0.0588 2690 500 0.0735 3360 600 0.0882 4030 700 0.103 4700 800 0.118 5370 900 0.132 6040 1000 0.147 6720 2000 0.294 1.34 × 104 3000 0.441 2.01 × 104 4000 0.588 2.69 × 104 5000 0.735 3.36 × 104 6000 0.882 4.03 × 104 7000 1.03 4.70 × 104 8000 1.18 5.37 × 104 9000 1.32 6.04 × 104 1.00 × 104 1.47 6.72 × 104 2.00 × 104 2.94 1.34 × 105 3.00 × 104 4.41 2.01 × 105 4.00 × 104 5.88 2.69 × 105 4.42 × 104 6.50 2.97 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 54.7 0.0196 574 60.0 0.0215 630 70.0 0.0251 735 80.0 0.0287 840 90.0 0.0323 944 100 0.0359 1050 200 0.0718 2100 300 0.108 3150 400 0.144 4200 500 0.179 5250 600 0.215 6300 700 0.251 7350 800 0.287 8400 900 0.323 9440 1000 0.359 1.05 × 104 2000 0.718 2.10 × 104 3000 1.08 3.15 × 104 4000 1.44 4.20 × 104 5000 1.79 5.25 × 104 6000 2.15 6.30 × 104 7000 2.51 7.35 × 104 8000 2.87 8.40 × 104 9000 3.23 9.44 × 104 1.00 × 104 3.59 1.05 × 105 2.00 × 104 7.18 2.10 × 105 2.83 × 104 10.2 2.97 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 54.7 0.0407 827 60.0 0.0447 907 70.0 0.0521 1060 80.0 0.0595 1210 90.0 0.0670 1360 100 0.0744 1510 200 0.149 3020 300 0.223 4530 400 0.298 6040 500 0.372 7560 600 0.447 9070 700 0.521 1.06 × 104 800 0.595 1.21 × 104 900 0.670 1.36 × 104 1000 0.744 1.51 × 104 2000 1.49 3.02 × 104 3000 2.23 4.53 × 104 4000 2.98 6.04 × 104 5000 3.72 7.56 × 104 6000 4.47 9.07 × 104 7000 5.21 1.06 × 105 8000 5.95 1.21 × 105 9000 6.70 1.36 × 105 1.00 × 104 7.44 1.51 × 105 1.97 × 104 14.6 2.97 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 54.7 0.129 1470 60.0 0.141 1610 70.0 0.165 1880 80.0 0.188 2150 90.0 0.212 2420 100 0.235 2690 200 0.470 5370 300 0.706 8060 400 0.941 1.07 × 104 500 1.18 1.34 × 104 600 1.41 1.61 × 104 700 1.65 1.88 × 104 800 1.88 2.15 × 104 900 2.12 2.42 × 104 1000 2.35 2.69 × 104 2000 4.70 5.37 × 104 3000 7.06 8.06 × 104 4000 9.41 1.07 × 105 5000 11.8 1.34 × 105 6000 14.1 1.61 × 105 7000 16.5 1.88 × 105 7650 18.0 2.06 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 54.7 0.314 2300 60.0 0.345 2520 70.0 0.402 2940 80.0 0.459 3360 90.0 0.517 3780 100 0.574 4200 200 1.15 8400 300 1.72 1.26 × 104 400 2.30 1.68 × 104 500 2.87 2.10 × 104 600 3.45 2.52 × 104 700 4.02 2.94 × 104 800 4.59 3.36 × 104 900 5.17 3.78 × 104 1000 5.74 4.20 × 104 2000 11.5 8.40 × 104 3000 17.2 1.26 × 105 3130 18.0 1.32 × 105
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 54.7 0.651 3310 60.0 0.714 3630 70.0 0.834 4230 80.0 0.953 4840 90.0 1.07 5440 100 1.19 6040 200 2.38 1.21 × 104 300 3.57 1.81 × 104 400 4.76 2.42 × 104 500 5.95 3.02 × 104 600 7.14 3.63 × 104 700 8.34 4.23 × 104 800 9.53 4.84 × 104 900 10.7 5.44 × 104 1000 11.9 6.04 × 104 1510 18.0 9.14 × 104
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 54.7 1.21 4500 60.0 1.32 4940 70.0 1.54 5760 80.0 1.76 6580 90.0 1.99 7400 100 2.21 8230 200 4.41 1.65 × 104 300 6.62 2.47 × 104 400 8.82 3.29 × 104 500 11.0 4.11 × 104 600 13.2 4.94 × 104 700 15.4 5.76 × 104 800 17.6 6.58 × 104 816 18.0 6.71 × 104
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 54.7 2.06 5880 60.0 2.26 6450 70.0 2.63 7520 80.0 3.01 8600 90.0 3.39 9670 100 3.76 1.07 × 104 200 7.53 2.15 × 104 300 11.3 3.22 × 104 400 15.1 4.30 × 104 478 18.0 5.14 × 104
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 54.7 3.30 7440 60.0 3.62 8160 70.0 4.22 9520 80.0 4.82 1.09 × 104 90.0 5.43 1.22 × 104 100 6.03 1.36 × 104 200 12.1 2.72 × 104 299 18.0 4.06 × 104
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 54.7 5.03 9180 60.0 5.51 1.01 × 104 70.0 6.43 1.18 × 104 80.0 7.35 1.34 × 104 90.0 8.27 1.51 × 104 100 9.19 1.68 × 104 196 18.0 3.29 × 104
 Steel I Beam: S18 × 54.7 (S Section 18 inch tall × 54.7 lbf/ft) L = 125 ft (lbf/ft) (in) (psi) 54.7 12.3 1.44 × 104 60.0 13.5 1.57 × 104 70.0 15.7 1.84 × 104 80.0 17.9 2.10 × 104 80.2 18.0 2.11 × 104
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