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Wide Flange Steel I Beam: W8 × 10
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W8 × 10
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 stress_max 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 = 30.8 in4) for the W8 × 10 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
L = 80 ft
  
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 1.01 × 10-5 13.8
20.0 2.03 × 10-5 27.7
30.0 3.04 × 10-5 41.5
40.0 4.06 × 10-5 55.3
50.0 5.07 × 10-5 69.2
60.0 6.09 × 10-5 83.0
70.0 7.10 × 10-5 96.8
80.0 8.12 × 10-5 111
90.0 9.13 × 10-5 124
100 1.01 × 10-4 138
200 2.03 × 10-4 277
300 3.04 × 10-4 415
400 4.06 × 10-4 553
500 5.07 × 10-4 692
600 6.09 × 10-4 830
700 7.10 × 10-4 968
800 8.12 × 10-4 1110
900 9.13 × 10-4 1240
1000 0.00101 1380
2000 0.00203 2770
3000 0.00304 4150
4000 0.00406 5530
5000 0.00507 6920
6000 0.00609 8300
7000 0.00710 9680
8000 0.00812 1.11 × 104
9000 0.00913 1.24 × 104
1.00 × 104 0.0101 1.38 × 104
2.00 × 104 0.0203 2.77 × 104
3.00 × 104 0.0304 4.15 × 104
4.00 × 104 0.0406 5.53 × 104
5.00 × 104 0.0507 6.92 × 104
6.00 × 104 0.0609 8.30 × 104
7.00 × 104 0.0710 9.68 × 104
8.00 × 104 0.0812 1.11 × 105
9.00 × 104 0.0913 1.24 × 105
1.00 × 105 0.101 1.38 × 105
2.00 × 105 0.203 2.77 × 105
2.15 × 105 0.218 2.97 × 105
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 7.83 × 10-5 38.4
20.0 1.57 × 10-4 76.9
30.0 2.35 × 10-4 115
40.0 3.13 × 10-4 154
50.0 3.91 × 10-4 192
60.0 4.70 × 10-4 231
70.0 5.48 × 10-4 269
80.0 6.26 × 10-4 307
90.0 7.05 × 10-4 346
100 7.83 × 10-4 384
200 0.00157 769
300 0.00235 1150
400 0.00313 1540
500 0.00391 1920
600 0.00470 2310
700 0.00548 2690
800 0.00626 3070
900 0.00705 3460
1000 0.00783 3840
2000 0.0157 7690
3000 0.0235 1.15 × 104
4000 0.0313 1.54 × 104
5000 0.0391 1.92 × 104
6000 0.0470 2.31 × 104
7000 0.0548 2.69 × 104
8000 0.0626 3.07 × 104
9000 0.0705 3.46 × 104
1.00 × 104 0.0783 3.84 × 104
2.00 × 104 0.157 7.69 × 104
3.00 × 104 0.235 1.15 × 105
4.00 × 104 0.313 1.54 × 105
5.00 × 104 0.391 1.92 × 105
6.00 × 104 0.470 2.31 × 105
7.00 × 104 0.548 2.69 × 105
7.73 × 104 0.605 2.97 × 105
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 0.00125 154
20.0 0.00251 307
30.0 0.00376 461
40.0 0.00501 615
50.0 0.00626 769
60.0 0.00752 922
70.0 0.00877 1080
80.0 0.0100 1230
90.0 0.0113 1380
100 0.0125 1540
200 0.0251 3070
300 0.0376 4610
400 0.0501 6150
500 0.0626 7690
600 0.0752 9220
700 0.0877 1.08 × 104
800 0.100 1.23 × 104
900 0.113 1.38 × 104
1000 0.125 1.54 × 104
2000 0.251 3.07 × 104
3000 0.376 4.61 × 104
4000 0.501 6.15 × 104
5000 0.626 7.69 × 104
6000 0.752 9.22 × 104
7000 0.877 1.08 × 105
8000 1.00 1.23 × 105
9000 1.13 1.38 × 105
1.00 × 104 1.25 1.54 × 105
1.93 × 104 2.42 2.97 × 105
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 0.00634 346
20.0 0.0127 692
30.0 0.0190 1040
40.0 0.0254 1380
50.0 0.0317 1730
60.0 0.0380 2070
70.0 0.0444 2420
80.0 0.0507 2770
90.0 0.0571 3110
100 0.0634 3460
200 0.127 6920
300 0.190 1.04 × 104
400 0.254 1.38 × 104
500 0.317 1.73 × 104
600 0.380 2.07 × 104
700 0.444 2.42 × 104
800 0.507 2.77 × 104
900 0.571 3.11 × 104
1000 0.634 3.46 × 104
2000 1.27 6.92 × 104
3000 1.90 1.04 × 105
4000 2.54 1.38 × 105
5000 3.17 1.73 × 105
6000 3.80 2.07 × 105
7000 4.44 2.42 × 105
8000 5.07 2.77 × 105
8590 5.45 2.97 × 105
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 0.0200 615
20.0 0.0401 1230
30.0 0.0601 1840
40.0 0.0802 2460
50.0 0.100 3070
60.0 0.120 3690
70.0 0.140 4300
80.0 0.160 4920
90.0 0.180 5530
100 0.200 6150
200 0.401 1.23 × 104
300 0.601 1.84 × 104
400 0.802 2.46 × 104
500 1.00 3.07 × 104
600 1.20 3.69 × 104
700 1.40 4.30 × 104
800 1.60 4.92 × 104
900 1.80 5.53 × 104
1000 2.00 6.15 × 104
2000 4.01 1.23 × 105
3000 6.01 1.84 × 105
3940 7.89 2.42 × 105
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 0.0489 961
20.0 0.0979 1920
30.0 0.147 2880
40.0 0.196 3840
50.0 0.245 4800
60.0 0.294 5760
70.0 0.342 6720
80.0 0.391 7690
90.0 0.440 8650
100 0.489 9610
200 0.979 1.92 × 104
300 1.47 2.88 × 104
400 1.96 3.84 × 104
500 2.45 4.80 × 104
600 2.94 5.76 × 104
700 3.42 6.72 × 104
800 3.91 7.69 × 104
900 4.40 8.65 × 104
1000 4.89 9.61 × 104
1610 7.89 1.55 × 105
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 0.101 1380
20.0 0.203 2770
30.0 0.304 4150
40.0 0.406 5530
50.0 0.507 6920
60.0 0.609 8300
70.0 0.710 9680
80.0 0.812 1.11 × 104
90.0 0.913 1.24 × 104
100 1.01 1.38 × 104
200 2.03 2.77 × 104
300 3.04 4.15 × 104
400 4.06 5.53 × 104
500 5.07 6.92 × 104
600 6.09 8.30 × 104
700 7.10 9.68 × 104
778 7.89 1.08 × 105
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 0.321 2460
20.0 0.641 4920
30.0 0.962 7380
40.0 1.28 9840
50.0 1.60 1.23 × 104
60.0 1.92 1.48 × 104
70.0 2.24 1.72 × 104
80.0 2.57 1.97 × 104
90.0 2.89 2.21 × 104
100 3.21 2.46 × 104
200 6.41 4.92 × 104
246 7.89 6.05 × 104
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 0.783 3840
20.0 1.57 7690
30.0 2.35 1.15 × 104
40.0 3.13 1.54 × 104
50.0 3.91 1.92 × 104
60.0 4.70 2.31 × 104
70.0 5.48 2.69 × 104
80.0 6.26 3.07 × 104
90.0 7.05 3.46 × 104
100 7.83 3.84 × 104
101 7.89 3.87 × 104
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 1.62 5530
20.0 3.25 1.11 × 104
30.0 4.87 1.66 × 104
40.0 6.49 2.21 × 104
48.6 7.89 2.69 × 104
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 3.01 7530
20.0 6.01 1.51 × 104
26.2 7.89 1.98 × 104
Steel I Beam: W8 × 10 (Wide Flange 8 inch tall × 10 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
10.0 5.13 9840
15.4 7.89 1.51 × 104
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