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Wide Flange Steel I Beam: W8 × 15
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » 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 a single span, the maximum displacement w_max and the maximum normal stress stress_max occur at the center 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 Yield 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.
L = 3 ft
L = 5 ft
L = 10 ft
L = 15 ft
L = 20 ft
L = 25 ft
L = 30 ft
L = 40 ft
L = 50 ft
L = 60 ft
L = 70 ft
   
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 1.87 × 10-5 17.1
20.0 2.49 × 10-5 22.8
30.0 3.74 × 10-5 34.2
40.0 4.99 × 10-5 45.6
50.0 6.23 × 10-5 57.0
60.0 7.48 × 10-5 68.4
70.0 8.73 × 10-5 79.8
80.0 9.97 × 10-5 91.2
90.0 1.12 × 10-4 103
100 1.25 × 10-4 114
200 2.49 × 10-4 228
300 3.74 × 10-4 342
400 4.99 × 10-4 456
500 6.23 × 10-4 570
600 7.48 × 10-4 684
700 8.73 × 10-4 798
800 9.97 × 10-4 912
900 0.00112 1030
1000 0.00125 1140
2000 0.00249 2280
3000 0.00374 3420
4000 0.00499 4560
5000 0.00623 5700
6000 0.00748 6840
7000 0.00873 7980
8000 0.00997 9120
9000 0.0112 1.03 × 104
1.00 × 104 0.0125 1.14 × 104
2.00 × 104 0.0249 2.28 × 104
3.00 × 104 0.0374 3.42 × 104
4.00 × 104 0.0499 4.56 × 104
5.00 × 104 0.0623 5.70 × 104
6.00 × 104 0.0748 6.84 × 104
7.00 × 104 0.0873 7.98 × 104
8.00 × 104 0.0997 9.12 × 104
9.00 × 104 0.112 1.03 × 105
1.00 × 105 0.125 1.14 × 105
2.00 × 105 0.249 2.28 × 105
2.60 × 105 0.325 2.97 × 105
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 1.44 × 10-4 47.5
20.0 1.92 × 10-4 63.4
30.0 2.89 × 10-4 95.0
40.0 3.85 × 10-4 127
50.0 4.81 × 10-4 158
60.0 5.77 × 10-4 190
70.0 6.73 × 10-4 222
80.0 7.70 × 10-4 253
90.0 8.66 × 10-4 285
100 9.62 × 10-4 317
200 0.00192 634
300 0.00289 950
400 0.00385 1270
500 0.00481 1580
600 0.00577 1900
700 0.00673 2220
800 0.00770 2530
900 0.00866 2850
1000 0.00962 3170
2000 0.0192 6340
3000 0.0289 9500
4000 0.0385 1.27 × 104
5000 0.0481 1.58 × 104
6000 0.0577 1.90 × 104
7000 0.0673 2.22 × 104
8000 0.0770 2.53 × 104
9000 0.0866 2.85 × 104
1.00 × 104 0.0962 3.17 × 104
2.00 × 104 0.192 6.34 × 104
3.00 × 104 0.289 9.50 × 104
4.00 × 104 0.385 1.27 × 105
5.00 × 104 0.481 1.58 × 105
6.00 × 104 0.577 1.90 × 105
7.00 × 104 0.673 2.22 × 105
8.00 × 104 0.770 2.53 × 105
9.00 × 104 0.866 2.85 × 105
9.38 × 104 0.902 2.97 × 105
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 0.00231 190
20.0 0.00308 253
30.0 0.00462 380
40.0 0.00616 507
50.0 0.00770 634
60.0 0.00923 760
70.0 0.0108 887
80.0 0.0123 1010
90.0 0.0139 1140
100 0.0154 1270
200 0.0308 2530
300 0.0462 3800
400 0.0616 5070
500 0.0770 6340
600 0.0923 7600
700 0.108 8870
800 0.123 1.01 × 104
900 0.139 1.14 × 104
1000 0.154 1.27 × 104
2000 0.308 2.53 × 104
3000 0.462 3.80 × 104
4000 0.616 5.07 × 104
5000 0.770 6.34 × 104
6000 0.923 7.60 × 104
7000 1.08 8.87 × 104
8000 1.23 1.01 × 105
9000 1.39 1.14 × 105
1.00 × 104 1.54 1.27 × 105
2.00 × 104 3.08 2.53 × 105
2.34 × 104 3.61 2.97 × 105
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 0.0117 428
20.0 0.0156 570
30.0 0.0234 855
40.0 0.0312 1140
50.0 0.0390 1430
60.0 0.0467 1710
70.0 0.0545 2000
80.0 0.0623 2280
90.0 0.0701 2570
100 0.0779 2850
200 0.156 5700
300 0.234 8550
400 0.312 1.14 × 104
500 0.390 1.43 × 104
600 0.467 1.71 × 104
700 0.545 2.00 × 104
800 0.623 2.28 × 104
900 0.701 2.57 × 104
1000 0.779 2.85 × 104
2000 1.56 5.70 × 104
3000 2.34 8.55 × 104
4000 3.12 1.14 × 105
5000 3.90 1.43 × 105
6000 4.67 1.71 × 105
7000 5.45 2.00 × 105
8000 6.23 2.28 × 105
9000 7.01 2.57 × 105
1.00 × 104 7.79 2.85 × 105
1.04 × 104 8.12 2.97 × 105
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 0.0369 760
20.0 0.0492 1010
30.0 0.0739 1520
40.0 0.0985 2030
50.0 0.123 2530
60.0 0.148 3040
70.0 0.172 3550
80.0 0.197 4060
90.0 0.222 4560
100 0.246 5070
200 0.492 1.01 × 104
300 0.739 1.52 × 104
400 0.985 2.03 × 104
500 1.23 2.53 × 104
600 1.48 3.04 × 104
700 1.72 3.55 × 104
800 1.97 4.06 × 104
900 2.22 4.56 × 104
1000 2.46 5.07 × 104
2000 4.92 1.01 × 105
3000 7.39 1.52 × 105
3290 8.11 1.67 × 105
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 0.0902 1190
20.0 0.120 1580
30.0 0.180 2380
40.0 0.240 3170
50.0 0.301 3960
60.0 0.361 4750
70.0 0.421 5540
80.0 0.481 6340
90.0 0.541 7130
100 0.601 7920
200 1.20 1.58 × 104
300 1.80 2.38 × 104
400 2.40 3.17 × 104
500 3.01 3.96 × 104
600 3.61 4.75 × 104
700 4.21 5.54 × 104
800 4.81 6.34 × 104
900 5.41 7.13 × 104
1000 6.01 7.92 × 104
1350 8.11 1.07 × 105
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 0.187 1710
20.0 0.249 2280
30.0 0.374 3420
40.0 0.499 4560
50.0 0.623 5700
60.0 0.748 6840
70.0 0.873 7980
80.0 0.997 9120
90.0 1.12 1.03 × 104
100 1.25 1.14 × 104
200 2.49 2.28 × 104
300 3.74 3.42 × 104
400 4.99 4.56 × 104
500 6.23 5.70 × 104
600 7.48 6.84 × 104
651 8.11 7.42 × 104
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 0.591 3040
20.0 0.788 4060
30.0 1.18 6080
40.0 1.58 8110
50.0 1.97 1.01 × 104
60.0 2.36 1.22 × 104
70.0 2.76 1.42 × 104
80.0 3.15 1.62 × 104
90.0 3.55 1.82 × 104
100 3.94 2.03 × 104
200 7.88 4.06 × 104
206 8.11 4.17 × 104
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 1.44 4750
20.0 1.92 6340
30.0 2.89 9500
40.0 3.85 1.27 × 104
50.0 4.81 1.58 × 104
60.0 5.77 1.90 × 104
70.0 6.73 2.22 × 104
80.0 7.70 2.53 × 104
84.3 8.11 2.67 × 104
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 2.99 6840
20.0 3.99 9120
30.0 5.98 1.37 × 104
40.0 7.98 1.82 × 104
40.7 8.11 1.85 × 104
Steel I Beam: W8 × 15 (Wide Flange 8 inch tall × 15 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
15.0 5.54 9310
20.0 7.39 1.24 × 104
21.9 8.11 1.36 × 104
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