Wide Flange Steel I Beam: W8 × 15

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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W8 × 15
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in three equal spans, we compute the displacement at the middle of the first and the third spans, and the maximum normal stress occuring at the second and third supports of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 48.0 in4) for the W8 × 15 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 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 15.0 9.77 × 10-6 13.7 20.0 1.30 × 10-5 18.2 30.0 1.95 × 10-5 27.4 40.0 2.60 × 10-5 36.5 50.0 3.26 × 10-5 45.6 60.0 3.91 × 10-5 54.7 70.0 4.56 × 10-5 63.9 80.0 5.21 × 10-5 73.0 90.0 5.86 × 10-5 82.1 100 6.51 × 10-5 91.2 200 1.30 × 10-4 182 300 1.95 × 10-4 274 400 2.60 × 10-4 365 500 3.26 × 10-4 456 600 3.91 × 10-4 547 700 4.56 × 10-4 639 800 5.21 × 10-4 730 900 5.86 × 10-4 821 1000 6.51 × 10-4 912 2000 0.00130 1820 3000 0.00195 2740 4000 0.00260 3650 5000 0.00326 4560 6000 0.00391 5470 7000 0.00456 6390 8000 0.00521 7300 9000 0.00586 8210 1.00 × 104 0.00651 9120 2.00 × 104 0.0130 1.82 × 104 3.00 × 104 0.0195 2.74 × 104 4.00 × 104 0.0260 3.65 × 104 5.00 × 104 0.0326 4.56 × 104 6.00 × 104 0.0391 5.47 × 104 7.00 × 104 0.0456 6.39 × 104 8.00 × 104 0.0521 7.30 × 104 9.00 × 104 0.0586 8.21 × 104 1.00 × 105 0.0651 9.12 × 104 2.00 × 105 0.130 1.82 × 105 3.00 × 105 0.195 2.74 × 105 3.26 × 105 0.212 2.97 × 105
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 15.0 7.53 × 10-5 38.0 20.0 1.00 × 10-4 50.7 30.0 1.51 × 10-4 76.0 40.0 2.01 × 10-4 101 50.0 2.51 × 10-4 127 60.0 3.01 × 10-4 152 70.0 3.52 × 10-4 177 80.0 4.02 × 10-4 203 90.0 4.52 × 10-4 228 100 5.02 × 10-4 253 200 0.00100 507 300 0.00151 760 400 0.00201 1010 500 0.00251 1270 600 0.00301 1520 700 0.00352 1770 800 0.00402 2030 900 0.00452 2280 1000 0.00502 2530 2000 0.0100 5070 3000 0.0151 7600 4000 0.0201 1.01 × 104 5000 0.0251 1.27 × 104 6000 0.0301 1.52 × 104 7000 0.0352 1.77 × 104 8000 0.0402 2.03 × 104 9000 0.0452 2.28 × 104 1.00 × 104 0.0502 2.53 × 104 2.00 × 104 0.100 5.07 × 104 3.00 × 104 0.151 7.60 × 104 4.00 × 104 0.201 1.01 × 105 5.00 × 104 0.251 1.27 × 105 6.00 × 104 0.301 1.52 × 105 7.00 × 104 0.352 1.77 × 105 8.00 × 104 0.402 2.03 × 105 9.00 × 104 0.452 2.28 × 105 1.00 × 105 0.502 2.53 × 105 1.17 × 105 0.589 2.97 × 105
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 15.0 0.00121 152 20.0 0.00161 203 30.0 0.00241 304 40.0 0.00321 406 50.0 0.00402 507 60.0 0.00482 608 70.0 0.00563 710 80.0 0.00643 811 90.0 0.00723 912 100 0.00804 1010 200 0.0161 2030 300 0.0241 3040 400 0.0321 4060 500 0.0402 5070 600 0.0482 6080 700 0.0563 7100 800 0.0643 8110 900 0.0723 9120 1000 0.0804 1.01 × 104 2000 0.161 2.03 × 104 3000 0.241 3.04 × 104 4000 0.321 4.06 × 104 5000 0.402 5.07 × 104 6000 0.482 6.08 × 104 7000 0.563 7.10 × 104 8000 0.643 8.11 × 104 9000 0.723 9.12 × 104 1.00 × 104 0.804 1.01 × 105 2.00 × 104 1.61 2.03 × 105 2.93 × 104 2.36 2.97 × 105
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 15.0 0.00610 342 20.0 0.00814 456 30.0 0.0122 684 40.0 0.0163 912 50.0 0.0203 1140 60.0 0.0244 1370 70.0 0.0285 1600 80.0 0.0326 1820 90.0 0.0366 2050 100 0.0407 2280 200 0.0814 4560 300 0.122 6840 400 0.163 9120 500 0.203 1.14 × 104 600 0.244 1.37 × 104 700 0.285 1.60 × 104 800 0.326 1.82 × 104 900 0.366 2.05 × 104 1000 0.407 2.28 × 104 2000 0.814 4.56 × 104 3000 1.22 6.84 × 104 4000 1.63 9.12 × 104 5000 2.03 1.14 × 105 6000 2.44 1.37 × 105 7000 2.85 1.60 × 105 8000 3.26 1.82 × 105 9000 3.66 2.05 × 105 1.00 × 104 4.07 2.28 × 105 1.30 × 104 5.30 2.97 × 105
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 15.0 0.0193 608 20.0 0.0257 811 30.0 0.0386 1220 40.0 0.0514 1620 50.0 0.0643 2030 60.0 0.0772 2430 70.0 0.0900 2840 80.0 0.103 3240 90.0 0.116 3650 100 0.129 4060 200 0.257 8110 300 0.386 1.22 × 104 400 0.514 1.62 × 104 500 0.643 2.03 × 104 600 0.772 2.43 × 104 700 0.900 2.84 × 104 800 1.03 3.24 × 104 900 1.16 3.65 × 104 1000 1.29 4.06 × 104 2000 2.57 8.11 × 104 3000 3.86 1.22 × 105 4000 5.14 1.62 × 105 5000 6.43 2.03 × 105 6000 7.72 2.43 × 105 6310 8.11 2.56 × 105
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 15.0 0.0471 950 20.0 0.0628 1270 30.0 0.0942 1900 40.0 0.126 2530 50.0 0.157 3170 60.0 0.188 3800 70.0 0.220 4440 80.0 0.251 5070 90.0 0.283 5700 100 0.314 6340 200 0.628 1.27 × 104 300 0.942 1.90 × 104 400 1.26 2.53 × 104 500 1.57 3.17 × 104 600 1.88 3.80 × 104 700 2.20 4.44 × 104 800 2.51 5.07 × 104 900 2.83 5.70 × 104 1000 3.14 6.34 × 104 2000 6.28 1.27 × 105 2580 8.11 1.64 × 105
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 15.0 0.0977 1370 20.0 0.130 1820 30.0 0.195 2740 40.0 0.260 3650 50.0 0.326 4560 60.0 0.391 5470 70.0 0.456 6390 80.0 0.521 7300 90.0 0.586 8210 100 0.651 9120 200 1.30 1.82 × 104 300 1.95 2.74 × 104 400 2.60 3.65 × 104 500 3.26 4.56 × 104 600 3.91 5.47 × 104 700 4.56 6.39 × 104 800 5.21 7.30 × 104 900 5.86 8.21 × 104 1000 6.51 9.12 × 104 1250 8.11 1.14 × 105
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 15.0 0.309 2430 20.0 0.412 3240 30.0 0.617 4870 40.0 0.823 6490 50.0 1.03 8110 60.0 1.23 9730 70.0 1.44 1.14 × 104 80.0 1.65 1.30 × 104 90.0 1.85 1.46 × 104 100 2.06 1.62 × 104 200 4.12 3.24 × 104 300 6.17 4.87 × 104 394 8.11 6.39 × 104
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 15.0 0.753 3800 20.0 1.00 5070 30.0 1.51 7600 40.0 2.01 1.01 × 104 50.0 2.51 1.27 × 104 60.0 3.01 1.52 × 104 70.0 3.52 1.77 × 104 80.0 4.02 2.03 × 104 90.0 4.52 2.28 × 104 100 5.02 2.53 × 104 161 8.11 4.09 × 104
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 15.0 1.56 5470 20.0 2.08 7300 30.0 3.12 1.09 × 104 40.0 4.17 1.46 × 104 50.0 5.21 1.82 × 104 60.0 6.25 2.19 × 104 70.0 7.29 2.55 × 104 77.9 8.11 2.84 × 104
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 15.0 2.89 7450 20.0 3.86 9930 30.0 5.79 1.49 × 104 40.0 7.72 1.99 × 104 42.0 8.11 2.09 × 104
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 15.0 4.94 9730 20.0 6.58 1.30 × 104 24.6 8.11 1.60 × 104
 Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 15.0 7.91 1.23 × 104 15.4 8.11 1.26 × 104