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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » Wide Flange Steel I Beam » W12 × 30
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in two equal spans, we compute the displacement at the middle of each span and the maximum normal stress occuring at the center support of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 238 in4) for the W12 × 30 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: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 30.0 3.02 × 10-6 10.5 40.0 4.02 × 10-6 14.0 50.0 5.03 × 10-6 17.5 60.0 6.03 × 10-6 21.0 70.0 7.04 × 10-6 24.5 80.0 8.05 × 10-6 28.0 90.0 9.05 × 10-6 31.5 100 1.01 × 10-5 35.0 200 2.01 × 10-5 70.0 300 3.02 × 10-5 105 400 4.02 × 10-5 140 500 5.03 × 10-5 175 600 6.03 × 10-5 210 700 7.04 × 10-5 245 800 8.05 × 10-5 280 900 9.05 × 10-5 315 1000 1.01 × 10-4 350 2000 2.01 × 10-4 700 3000 3.02 × 10-4 1050 4000 4.02 × 10-4 1400 5000 5.03 × 10-4 1750 6000 6.03 × 10-4 2100 7000 7.04 × 10-4 2450 8000 8.05 × 10-4 2800 9000 9.05 × 10-4 3150 1.00 × 104 0.00101 3500 2.00 × 104 0.00201 7000 3.00 × 104 0.00302 1.05 × 104 4.00 × 104 0.00402 1.40 × 104 5.00 × 104 0.00503 1.75 × 104 6.00 × 104 0.00603 2.10 × 104 7.00 × 104 0.00704 2.45 × 104 8.00 × 104 0.00805 2.80 × 104 9.00 × 104 0.00905 3.15 × 104 1.00 × 105 0.0101 3.50 × 104 2.00 × 105 0.0201 7.00 × 104 3.00 × 105 0.0302 1.05 × 105 4.00 × 105 0.0402 1.40 × 105 5.00 × 105 0.0503 1.75 × 105 6.00 × 105 0.0603 2.10 × 105 7.00 × 105 0.0704 2.45 × 105 8.00 × 105 0.0805 2.80 × 105 8.49 × 105 0.0854 2.97 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 30.0 2.33 × 10-5 29.2 40.0 3.10 × 10-5 38.9 50.0 3.88 × 10-5 48.6 60.0 4.66 × 10-5 58.3 70.0 5.43 × 10-5 68.1 80.0 6.21 × 10-5 77.8 90.0 6.98 × 10-5 87.5 100 7.76 × 10-5 97.2 200 1.55 × 10-4 194 300 2.33 × 10-4 292 400 3.10 × 10-4 389 500 3.88 × 10-4 486 600 4.66 × 10-4 583 700 5.43 × 10-4 681 800 6.21 × 10-4 778 900 6.98 × 10-4 875 1000 7.76 × 10-4 972 2000 0.00155 1940 3000 0.00233 2920 4000 0.00310 3890 5000 0.00388 4860 6000 0.00466 5830 7000 0.00543 6810 8000 0.00621 7780 9000 0.00698 8750 1.00 × 104 0.00776 9720 2.00 × 104 0.0155 1.94 × 104 3.00 × 104 0.0233 2.92 × 104 4.00 × 104 0.0310 3.89 × 104 5.00 × 104 0.0388 4.86 × 104 6.00 × 104 0.0466 5.83 × 104 7.00 × 104 0.0543 6.81 × 104 8.00 × 104 0.0621 7.78 × 104 9.00 × 104 0.0698 8.75 × 104 1.00 × 105 0.0776 9.72 × 104 2.00 × 105 0.155 1.94 × 105 3.00 × 105 0.233 2.92 × 105 3.06 × 105 0.237 2.97 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 30.0 3.72 × 10-4 117 40.0 4.97 × 10-4 156 50.0 6.21 × 10-4 194 60.0 7.45 × 10-4 233 70.0 8.69 × 10-4 272 80.0 9.93 × 10-4 311 90.0 0.00112 350 100 0.00124 389 200 0.00248 778 300 0.00372 1170 400 0.00497 1560 500 0.00621 1940 600 0.00745 2330 700 0.00869 2720 800 0.00993 3110 900 0.0112 3500 1000 0.0124 3890 2000 0.0248 7780 3000 0.0372 1.17 × 104 4000 0.0497 1.56 × 104 5000 0.0621 1.94 × 104 6000 0.0745 2.33 × 104 7000 0.0869 2.72 × 104 8000 0.0993 3.11 × 104 9000 0.112 3.50 × 104 1.00 × 104 0.124 3.89 × 104 2.00 × 104 0.248 7.78 × 104 3.00 × 104 0.372 1.17 × 105 4.00 × 104 0.497 1.56 × 105 5.00 × 104 0.621 1.94 × 105 6.00 × 104 0.745 2.33 × 105 7.00 × 104 0.869 2.72 × 105 7.64 × 104 0.948 2.97 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 30.0 0.00189 262 40.0 0.00251 350 50.0 0.00314 437 60.0 0.00377 525 70.0 0.00440 612 80.0 0.00503 700 90.0 0.00566 787 100 0.00629 875 200 0.0126 1750 300 0.0189 2620 400 0.0251 3500 500 0.0314 4370 600 0.0377 5250 700 0.0440 6120 800 0.0503 7000 900 0.0566 7870 1000 0.0629 8750 2000 0.126 1.75 × 104 3000 0.189 2.62 × 104 4000 0.251 3.50 × 104 5000 0.314 4.37 × 104 6000 0.377 5.25 × 104 7000 0.440 6.12 × 104 8000 0.503 7.00 × 104 9000 0.566 7.87 × 104 1.00 × 104 0.629 8.75 × 104 2.00 × 104 1.26 1.75 × 105 3.00 × 104 1.89 2.62 × 105 3.39 × 104 2.13 2.97 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 30.0 0.00596 467 40.0 0.00795 622 50.0 0.00993 778 60.0 0.0119 933 70.0 0.0139 1090 80.0 0.0159 1240 90.0 0.0179 1400 100 0.0199 1560 200 0.0397 3110 300 0.0596 4670 400 0.0795 6220 500 0.0993 7780 600 0.119 9330 700 0.139 1.09 × 104 800 0.159 1.24 × 104 900 0.179 1.40 × 104 1000 0.199 1.56 × 104 2000 0.397 3.11 × 104 3000 0.596 4.67 × 104 4000 0.795 6.22 × 104 5000 0.993 7.78 × 104 6000 1.19 9.33 × 104 7000 1.39 1.09 × 105 8000 1.59 1.24 × 105 9000 1.79 1.40 × 105 1.00 × 104 1.99 1.56 × 105 1.91 × 104 3.79 2.97 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 30.0 0.0145 729 40.0 0.0194 972 50.0 0.0242 1220 60.0 0.0291 1460 70.0 0.0339 1700 80.0 0.0388 1940 90.0 0.0436 2190 100 0.0485 2430 200 0.0970 4860 300 0.145 7290 400 0.194 9720 500 0.242 1.22 × 104 600 0.291 1.46 × 104 700 0.339 1.70 × 104 800 0.388 1.94 × 104 900 0.436 2.19 × 104 1000 0.485 2.43 × 104 2000 0.970 4.86 × 104 3000 1.45 7.29 × 104 4000 1.94 9.72 × 104 5000 2.42 1.22 × 105 6000 2.91 1.46 × 105 7000 3.39 1.70 × 105 8000 3.88 1.94 × 105 9000 4.36 2.19 × 105 1.00 × 104 4.85 2.43 × 105 1.22 × 104 5.93 2.97 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 30.0 0.0302 1050 40.0 0.0402 1400 50.0 0.0503 1750 60.0 0.0603 2100 70.0 0.0704 2450 80.0 0.0805 2800 90.0 0.0905 3150 100 0.101 3500 200 0.201 7000 300 0.302 1.05 × 104 400 0.402 1.40 × 104 500 0.503 1.75 × 104 600 0.603 2.10 × 104 700 0.704 2.45 × 104 800 0.805 2.80 × 104 900 0.905 3.15 × 104 1000 1.01 3.50 × 104 2000 2.01 7.00 × 104 3000 3.02 1.05 × 105 4000 4.02 1.40 × 105 5000 5.03 1.75 × 105 6000 6.03 2.10 × 105 7000 7.04 2.45 × 105 8000 8.05 2.80 × 105 8490 8.54 2.97 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 30.0 0.0954 1870 40.0 0.127 2490 50.0 0.159 3110 60.0 0.191 3730 70.0 0.222 4360 80.0 0.254 4980 90.0 0.286 5600 100 0.318 6220 200 0.636 1.24 × 104 300 0.954 1.87 × 104 400 1.27 2.49 × 104 500 1.59 3.11 × 104 600 1.91 3.73 × 104 700 2.22 4.36 × 104 800 2.54 4.98 × 104 900 2.86 5.60 × 104 1000 3.18 6.22 × 104 2000 6.36 1.24 × 105 3000 9.54 1.87 × 105 3880 12.3 2.42 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 30.0 0.233 2920 40.0 0.310 3890 50.0 0.388 4860 60.0 0.466 5830 70.0 0.543 6810 80.0 0.621 7780 90.0 0.698 8750 100 0.776 9720 200 1.55 1.94 × 104 300 2.33 2.92 × 104 400 3.10 3.89 × 104 500 3.88 4.86 × 104 600 4.66 5.83 × 104 700 5.43 6.81 × 104 800 6.21 7.78 × 104 900 6.98 8.75 × 104 1000 7.76 9.72 × 104 1590 12.3 1.55 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 30.0 0.483 4200 40.0 0.644 5600 50.0 0.805 7000 60.0 0.965 8400 70.0 1.13 9800 80.0 1.29 1.12 × 104 90.0 1.45 1.26 × 104 100 1.61 1.40 × 104 200 3.22 2.80 × 104 300 4.83 4.20 × 104 400 6.44 5.60 × 104 500 8.05 7.00 × 104 600 9.65 8.40 × 104 700 11.3 9.80 × 104 767 12.3 1.07 × 105
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 30.0 0.894 5720 40.0 1.19 7620 50.0 1.49 9530 60.0 1.79 1.14 × 104 70.0 2.09 1.33 × 104 80.0 2.38 1.52 × 104 90.0 2.68 1.71 × 104 100 2.98 1.91 × 104 200 5.96 3.81 × 104 300 8.94 5.72 × 104 400 11.9 7.62 × 104 414 12.3 7.89 × 104
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 30.0 1.53 7470 40.0 2.03 9950 50.0 2.54 1.24 × 104 60.0 3.05 1.49 × 104 70.0 3.56 1.74 × 104 80.0 4.07 1.99 × 104 90.0 4.58 2.24 × 104 100 5.09 2.49 × 104 200 10.2 4.98 × 104 243 12.3 6.04 × 104
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 30.0 2.44 9450 40.0 3.26 1.26 × 104 50.0 4.07 1.57 × 104 60.0 4.89 1.89 × 104 70.0 5.70 2.20 × 104 80.0 6.52 2.52 × 104 90.0 7.33 2.83 × 104 100 8.15 3.15 × 104 151 12.3 4.77 × 104
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 100 ft (lbf/ft) (in) (psi) 30.0 3.72 1.17 × 104 40.0 4.97 1.56 × 104 50.0 6.21 1.94 × 104 60.0 7.45 2.33 × 104 70.0 8.69 2.72 × 104 80.0 9.93 3.11 × 104 90.0 11.2 3.50 × 104 99.4 12.3 3.87 × 104
 Steel I Beam: W12 × 30 (Wide Flange 12 inch tall × 30 lbf/ft) L = 125 ft (lbf/ft) (in) (psi) 30.0 9.09 1.82 × 104 40.0 12.1 2.43 × 104 40.7 12.3 2.47 × 104