Materials Design Center Processes Unit Conversion Formulas Mathematics
 Calculators Discussion Forum Trade Publications Directory Service
Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Power Transmission

Gear drives, bearings, motors, clutches, couplings, machine controls, sensors and components.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

NASA Tech Briefs

Innovations developed by NASA and its industry partners in a wide array of fields.

more free magazines
Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » Wide Flange Steel I Beam » W8 × 13

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 = 39.6 in4) for the W8 × 13 Wide Flange 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: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 13.0 1.96 × 10-5 17.7 20.0 3.02 × 10-5 27.2 30.0 4.53 × 10-5 40.9 40.0 6.04 × 10-5 54.5 50.0 7.56 × 10-5 68.1 60.0 9.07 × 10-5 81.7 70.0 1.06 × 10-4 95.3 80.0 1.21 × 10-4 109 90.0 1.36 × 10-4 123 100 1.51 × 10-4 136 200 3.02 × 10-4 272 300 4.53 × 10-4 409 400 6.04 × 10-4 545 500 7.56 × 10-4 681 600 9.07 × 10-4 817 700 0.00106 953 800 0.00121 1090 900 0.00136 1230 1000 0.00151 1360 2000 0.00302 2720 3000 0.00453 4090 4000 0.00604 5450 5000 0.00756 6810 6000 0.00907 8170 7000 0.0106 9530 8000 0.0121 1.09 × 104 9000 0.0136 1.23 × 104 1.00 × 104 0.0151 1.36 × 104 2.00 × 104 0.0302 2.72 × 104 3.00 × 104 0.0453 4.09 × 104 4.00 × 104 0.0604 5.45 × 104 5.00 × 104 0.0756 6.81 × 104 6.00 × 104 0.0907 8.17 × 104 7.00 × 104 0.106 9.53 × 104 8.00 × 104 0.121 1.09 × 105 9.00 × 104 0.136 1.23 × 105 1.00 × 105 0.151 1.36 × 105 2.00 × 105 0.302 2.72 × 105 2.18 × 105 0.330 2.97 × 105
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 13.0 1.52 × 10-4 49.2 20.0 2.33 × 10-4 75.7 30.0 3.50 × 10-4 113 40.0 4.66 × 10-4 151 50.0 5.83 × 10-4 189 60.0 7.00 × 10-4 227 70.0 8.16 × 10-4 265 80.0 9.33 × 10-4 303 90.0 0.00105 340 100 0.00117 378 200 0.00233 757 300 0.00350 1130 400 0.00466 1510 500 0.00583 1890 600 0.00700 2270 700 0.00816 2650 800 0.00933 3030 900 0.0105 3400 1000 0.0117 3780 2000 0.0233 7570 3000 0.0350 1.13 × 104 4000 0.0466 1.51 × 104 5000 0.0583 1.89 × 104 6000 0.0700 2.27 × 104 7000 0.0816 2.65 × 104 8000 0.0933 3.03 × 104 9000 0.105 3.40 × 104 1.00 × 104 0.117 3.78 × 104 2.00 × 104 0.233 7.57 × 104 3.00 × 104 0.350 1.13 × 105 4.00 × 104 0.466 1.51 × 105 5.00 × 104 0.583 1.89 × 105 6.00 × 104 0.700 2.27 × 105 7.00 × 104 0.816 2.65 × 105 7.85 × 104 0.915 2.97 × 105
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 13.0 0.00243 197 20.0 0.00373 303 30.0 0.00560 454 40.0 0.00746 605 50.0 0.00933 757 60.0 0.0112 908 70.0 0.0131 1060 80.0 0.0149 1210 90.0 0.0168 1360 100 0.0187 1510 200 0.0373 3030 300 0.0560 4540 400 0.0746 6050 500 0.0933 7570 600 0.112 9080 700 0.131 1.06 × 104 800 0.149 1.21 × 104 900 0.168 1.36 × 104 1000 0.187 1.51 × 104 2000 0.373 3.03 × 104 3000 0.560 4.54 × 104 4000 0.746 6.05 × 104 5000 0.933 7.57 × 104 6000 1.12 9.08 × 104 7000 1.31 1.06 × 105 8000 1.49 1.21 × 105 9000 1.68 1.36 × 105 1.00 × 104 1.87 1.51 × 105 1.96 × 104 3.66 2.97 × 105
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 13.0 0.0123 443 20.0 0.0189 681 30.0 0.0283 1020 40.0 0.0378 1360 50.0 0.0472 1700 60.0 0.0567 2040 70.0 0.0661 2380 80.0 0.0756 2720 90.0 0.0850 3060 100 0.0944 3400 200 0.189 6810 300 0.283 1.02 × 104 400 0.378 1.36 × 104 500 0.472 1.70 × 104 600 0.567 2.04 × 104 700 0.661 2.38 × 104 800 0.756 2.72 × 104 900 0.850 3.06 × 104 1000 0.944 3.40 × 104 2000 1.89 6.81 × 104 3000 2.83 1.02 × 105 4000 3.78 1.36 × 105 5000 4.72 1.70 × 105 6000 5.67 2.04 × 105 7000 6.61 2.38 × 105 8000 7.56 2.72 × 105 8720 8.24 2.97 × 105
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 13.0 0.0388 787 20.0 0.0597 1210 30.0 0.0895 1820 40.0 0.119 2420 50.0 0.149 3030 60.0 0.179 3630 70.0 0.209 4240 80.0 0.239 4840 90.0 0.269 5450 100 0.298 6050 200 0.597 1.21 × 104 300 0.895 1.82 × 104 400 1.19 2.42 × 104 500 1.49 3.03 × 104 600 1.79 3.63 × 104 700 2.09 4.24 × 104 800 2.39 4.84 × 104 900 2.69 5.45 × 104 1000 2.98 6.05 × 104 2000 5.97 1.21 × 105 2680 7.99 1.62 × 105
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 13.0 0.0947 1230 20.0 0.146 1890 30.0 0.219 2840 40.0 0.291 3780 50.0 0.364 4730 60.0 0.437 5670 70.0 0.510 6620 80.0 0.583 7570 90.0 0.656 8510 100 0.729 9460 200 1.46 1.89 × 104 300 2.19 2.84 × 104 400 2.91 3.78 × 104 500 3.64 4.73 × 104 600 4.37 5.67 × 104 700 5.10 6.62 × 104 800 5.83 7.57 × 104 900 6.56 8.51 × 104 1000 7.29 9.46 × 104 1100 7.99 1.04 × 105
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 13.0 0.196 1770 20.0 0.302 2720 30.0 0.453 4090 40.0 0.604 5450 50.0 0.756 6810 60.0 0.907 8170 70.0 1.06 9530 80.0 1.21 1.09 × 104 90.0 1.36 1.23 × 104 100 1.51 1.36 × 104 200 3.02 2.72 × 104 300 4.53 4.09 × 104 400 6.04 5.45 × 104 500 7.56 6.81 × 104 529 7.99 7.20 × 104
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 13.0 0.621 3150 20.0 0.955 4840 30.0 1.43 7260 40.0 1.91 9680 50.0 2.39 1.21 × 104 60.0 2.87 1.45 × 104 70.0 3.34 1.69 × 104 80.0 3.82 1.94 × 104 90.0 4.30 2.18 × 104 100 4.78 2.42 × 104 167 7.99 4.05 × 104
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 13.0 1.52 4920 20.0 2.33 7570 30.0 3.50 1.13 × 104 40.0 4.66 1.51 × 104 50.0 5.83 1.89 × 104 60.0 7.00 2.27 × 104 68.5 7.99 2.59 × 104
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 13.0 3.14 7080 20.0 4.84 1.09 × 104 30.0 7.25 1.63 × 104 33.0 7.99 1.80 × 104
 Steel I Beam: W8 × 13 (Wide Flange 8 inch tall × 13 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 13.0 5.82 9640 17.8 7.99 1.32 × 104
Additional Information
Related Pages