S Section Steel I Beam: S8 × 18.4

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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » S Section Steel I Beam » S8 × 18.4

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 = 57.6 in4) for the S8 × 18.4 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: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 18.4 1.91 × 10-5 17.2 20.0 2.08 × 10-5 18.8 30.0 3.12 × 10-5 28.1 40.0 4.16 × 10-5 37.5 50.0 5.19 × 10-5 46.9 60.0 6.23 × 10-5 56.3 70.0 7.27 × 10-5 65.6 80.0 8.31 × 10-5 75.0 90.0 9.35 × 10-5 84.4 100 1.04 × 10-4 93.8 200 2.08 × 10-4 188 300 3.12 × 10-4 281 400 4.16 × 10-4 375 500 5.19 × 10-4 469 600 6.23 × 10-4 563 700 7.27 × 10-4 656 800 8.31 × 10-4 750 900 9.35 × 10-4 844 1000 0.00104 938 2000 0.00208 1880 3000 0.00312 2810 4000 0.00416 3750 5000 0.00519 4690 6000 0.00623 5630 7000 0.00727 6560 8000 0.00831 7500 9000 0.00935 8440 1.00 × 104 0.0104 9380 2.00 × 104 0.0208 1.88 × 104 3.00 × 104 0.0312 2.81 × 104 4.00 × 104 0.0416 3.75 × 104 5.00 × 104 0.0519 4.69 × 104 6.00 × 104 0.0623 5.63 × 104 7.00 × 104 0.0727 6.56 × 104 8.00 × 104 0.0831 7.50 × 104 9.00 × 104 0.0935 8.44 × 104 1.00 × 105 0.104 9.38 × 104 2.00 × 105 0.208 1.88 × 105 3.00 × 105 0.312 2.81 × 105 3.17 × 105 0.329 2.97 × 105
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 18.4 1.47 × 10-4 47.9 20.0 1.60 × 10-4 52.1 30.0 2.40 × 10-4 78.1 40.0 3.21 × 10-4 104 50.0 4.01 × 10-4 130 60.0 4.81 × 10-4 156 70.0 5.61 × 10-4 182 80.0 6.41 × 10-4 208 90.0 7.21 × 10-4 234 100 8.02 × 10-4 260 200 0.00160 521 300 0.00240 781 400 0.00321 1040 500 0.00401 1300 600 0.00481 1560 700 0.00561 1820 800 0.00641 2080 900 0.00721 2340 1000 0.00802 2600 2000 0.0160 5210 3000 0.0240 7810 4000 0.0321 1.04 × 104 5000 0.0401 1.30 × 104 6000 0.0481 1.56 × 104 7000 0.0561 1.82 × 104 8000 0.0641 2.08 × 104 9000 0.0721 2.34 × 104 1.00 × 104 0.0802 2.60 × 104 2.00 × 104 0.160 5.21 × 104 3.00 × 104 0.240 7.81 × 104 4.00 × 104 0.321 1.04 × 105 5.00 × 104 0.401 1.30 × 105 6.00 × 104 0.481 1.56 × 105 7.00 × 104 0.561 1.82 × 105 8.00 × 104 0.641 2.08 × 105 9.00 × 104 0.721 2.34 × 105 1.00 × 105 0.802 2.60 × 105 1.14 × 105 0.914 2.97 × 105
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 18.4 0.00236 192 20.0 0.00257 208 30.0 0.00385 313 40.0 0.00513 417 50.0 0.00641 521 60.0 0.00770 625 70.0 0.00898 729 80.0 0.0103 833 90.0 0.0115 938 100 0.0128 1040 200 0.0257 2080 300 0.0385 3130 400 0.0513 4170 500 0.0641 5210 600 0.0770 6250 700 0.0898 7290 800 0.103 8330 900 0.115 9380 1000 0.128 1.04 × 104 2000 0.257 2.08 × 104 3000 0.385 3.13 × 104 4000 0.513 4.17 × 104 5000 0.641 5.21 × 104 6000 0.770 6.25 × 104 7000 0.898 7.29 × 104 8000 1.03 8.33 × 104 9000 1.15 9.38 × 104 1.00 × 104 1.28 1.04 × 105 2.00 × 104 2.57 2.08 × 105 2.85 × 104 3.66 2.97 × 105
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 18.4 0.0119 431 20.0 0.0130 469 30.0 0.0195 703 40.0 0.0260 938 50.0 0.0325 1170 60.0 0.0390 1410 70.0 0.0454 1640 80.0 0.0519 1880 90.0 0.0584 2110 100 0.0649 2340 200 0.130 4690 300 0.195 7030 400 0.260 9380 500 0.325 1.17 × 104 600 0.390 1.41 × 104 700 0.454 1.64 × 104 800 0.519 1.88 × 104 900 0.584 2.11 × 104 1000 0.649 2.34 × 104 2000 1.30 4.69 × 104 3000 1.95 7.03 × 104 4000 2.60 9.38 × 104 5000 3.25 1.17 × 105 6000 3.90 1.41 × 105 7000 4.54 1.64 × 105 8000 5.19 1.88 × 105 9000 5.84 2.11 × 105 1.00 × 104 6.49 2.34 × 105 1.27 × 104 8.23 2.97 × 105
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 18.4 0.0378 767 20.0 0.0410 833 30.0 0.0616 1250 40.0 0.0821 1670 50.0 0.103 2080 60.0 0.123 2500 70.0 0.144 2920 80.0 0.164 3330 90.0 0.185 3750 100 0.205 4170 200 0.410 8330 300 0.616 1.25 × 104 400 0.821 1.67 × 104 500 1.03 2.08 × 104 600 1.23 2.50 × 104 700 1.44 2.92 × 104 800 1.64 3.33 × 104 900 1.85 3.75 × 104 1000 2.05 4.17 × 104 2000 4.10 8.33 × 104 3000 6.16 1.25 × 105 3900 8.00 1.62 × 105
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 18.4 0.0922 1200 20.0 0.100 1300 30.0 0.150 1950 40.0 0.200 2600 50.0 0.250 3260 60.0 0.301 3910 70.0 0.351 4560 80.0 0.401 5210 90.0 0.451 5860 100 0.501 6510 200 1.00 1.30 × 104 300 1.50 1.95 × 104 400 2.00 2.60 × 104 500 2.50 3.26 × 104 600 3.01 3.91 × 104 700 3.51 4.56 × 104 800 4.01 5.21 × 104 900 4.51 5.86 × 104 1000 5.01 6.51 × 104 1600 8.00 1.04 × 105
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 18.4 0.191 1720 20.0 0.208 1880 30.0 0.312 2810 40.0 0.416 3750 50.0 0.519 4690 60.0 0.623 5630 70.0 0.727 6560 80.0 0.831 7500 90.0 0.935 8440 100 1.04 9380 200 2.08 1.88 × 104 300 3.12 2.81 × 104 400 4.16 3.75 × 104 500 5.19 4.69 × 104 600 6.23 5.63 × 104 700 7.27 6.56 × 104 770 8.00 7.22 × 104
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 18.4 0.604 3070 20.0 0.657 3330 30.0 0.985 5000 40.0 1.31 6670 50.0 1.64 8330 60.0 1.97 1.00 × 104 70.0 2.30 1.17 × 104 80.0 2.63 1.33 × 104 90.0 2.95 1.50 × 104 100 3.28 1.67 × 104 200 6.57 3.33 × 104 244 8.00 4.06 × 104
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 18.4 1.47 4790 20.0 1.60 5210 30.0 2.40 7810 40.0 3.21 1.04 × 104 50.0 4.01 1.30 × 104 60.0 4.81 1.56 × 104 70.0 5.61 1.82 × 104 80.0 6.41 2.08 × 104 90.0 7.21 2.34 × 104 99.8 8.00 2.60 × 104
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 18.4 3.06 6900 20.0 3.32 7500 30.0 4.99 1.13 × 104 40.0 6.65 1.50 × 104 48.1 8.00 1.80 × 104
 Steel I Beam: S8 × 18.4 (S Section 8 inch tall × 18.4 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 18.4 5.67 9390 20.0 6.16 1.02 × 104 26.0 8.00 1.33 × 104