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Wide Flange Steel I Beam: W8 × 35
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four Equal Spans » Wide Flange Steel I Beam » W8 × 35
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in four equal spans, we compute the displacement at the middle of the first and fourth spans, and the maximum normal stress stress_max occuring at the second and fourth supports of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 127 in4) for the W8 × 35 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
L = 90 ft
  
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 7.98 × 10-6 12.9
40.0 9.12 × 10-6 14.8
50.0 1.14 × 10-5 18.5
60.0 1.37 × 10-5 22.2
70.0 1.60 × 10-5 25.9
80.0 1.82 × 10-5 29.6
90.0 2.05 × 10-5 33.3
100 2.28 × 10-5 37.0
200 4.56 × 10-5 74.0
300 6.84 × 10-5 111
400 9.12 × 10-5 148
500 1.14 × 10-4 185
600 1.37 × 10-4 222
700 1.60 × 10-4 259
800 1.82 × 10-4 296
900 2.05 × 10-4 333
1000 2.28 × 10-4 370
2000 4.56 × 10-4 740
3000 6.84 × 10-4 1110
4000 9.12 × 10-4 1480
5000 0.00114 1850
6000 0.00137 2220
7000 0.00160 2590
8000 0.00182 2960
9000 0.00205 3330
1.00 × 104 0.00228 3700
2.00 × 104 0.00456 7400
3.00 × 104 0.00684 1.11 × 104
4.00 × 104 0.00912 1.48 × 104
5.00 × 104 0.0114 1.85 × 104
6.00 × 104 0.0137 2.22 × 104
7.00 × 104 0.0160 2.59 × 104
8.00 × 104 0.0182 2.96 × 104
9.00 × 104 0.0205 3.33 × 104
1.00 × 105 0.0228 3.70 × 104
2.00 × 105 0.0456 7.40 × 104
3.00 × 105 0.0684 1.11 × 105
4.00 × 105 0.0912 1.48 × 105
5.00 × 105 0.114 1.85 × 105
6.00 × 105 0.137 2.22 × 105
7.00 × 105 0.160 2.59 × 105
8.00 × 105 0.182 2.96 × 105
8.03 × 105 0.183 2.97 × 105
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 6.16 × 10-5 36.0
40.0 7.04 × 10-5 41.1
50.0 8.79 × 10-5 51.4
60.0 1.06 × 10-4 61.6
70.0 1.23 × 10-4 71.9
80.0 1.41 × 10-4 82.2
90.0 1.58 × 10-4 92.4
100 1.76 × 10-4 103
200 3.52 × 10-4 205
300 5.28 × 10-4 308
400 7.04 × 10-4 411
500 8.79 × 10-4 514
600 0.00106 616
700 0.00123 719
800 0.00141 822
900 0.00158 924
1000 0.00176 1030
2000 0.00352 2050
3000 0.00528 3080
4000 0.00704 4110
5000 0.00879 5140
6000 0.0106 6160
7000 0.0123 7190
8000 0.0141 8220
9000 0.0158 9240
1.00 × 104 0.0176 1.03 × 104
2.00 × 104 0.0352 2.05 × 104
3.00 × 104 0.0528 3.08 × 104
4.00 × 104 0.0704 4.11 × 104
5.00 × 104 0.0879 5.14 × 104
6.00 × 104 0.106 6.16 × 104
7.00 × 104 0.123 7.19 × 104
8.00 × 104 0.141 8.22 × 104
9.00 × 104 0.158 9.24 × 104
1.00 × 105 0.176 1.03 × 105
2.00 × 105 0.352 2.05 × 105
2.89 × 105 0.509 2.97 × 105
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 9.85 × 10-4 144
40.0 0.00113 164
50.0 0.00141 205
60.0 0.00169 247
70.0 0.00197 288
80.0 0.00225 329
90.0 0.00253 370
100 0.00281 411
200 0.00563 822
300 0.00844 1230
400 0.0113 1640
500 0.0141 2050
600 0.0169 2470
700 0.0197 2880
800 0.0225 3290
900 0.0253 3700
1000 0.0281 4110
2000 0.0563 8220
3000 0.0844 1.23 × 104
4000 0.113 1.64 × 104
5000 0.141 2.05 × 104
6000 0.169 2.47 × 104
7000 0.197 2.88 × 104
8000 0.225 3.29 × 104
9000 0.253 3.70 × 104
1.00 × 104 0.281 4.11 × 104
2.00 × 104 0.563 8.22 × 104
3.00 × 104 0.844 1.23 × 105
4.00 × 104 1.13 1.64 × 105
5.00 × 104 1.41 2.05 × 105
6.00 × 104 1.69 2.47 × 105
7.00 × 104 1.97 2.88 × 105
7.23 × 104 2.03 2.97 × 105
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.00499 324
40.0 0.00570 370
50.0 0.00712 462
60.0 0.00855 555
70.0 0.00997 647
80.0 0.0114 740
90.0 0.0128 832
100 0.0142 924
200 0.0285 1850
300 0.0427 2770
400 0.0570 3700
500 0.0712 4620
600 0.0855 5550
700 0.0997 6470
800 0.114 7400
900 0.128 8320
1000 0.142 9240
2000 0.285 1.85 × 104
3000 0.427 2.77 × 104
4000 0.570 3.70 × 104
5000 0.712 4.62 × 104
6000 0.855 5.55 × 104
7000 0.997 6.47 × 104
8000 1.14 7.40 × 104
9000 1.28 8.32 × 104
1.00 × 104 1.42 9.24 × 104
2.00 × 104 2.85 1.85 × 105
3.00 × 104 4.27 2.77 × 105
3.21 × 104 4.58 2.97 × 105
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0158 575
40.0 0.0180 657
50.0 0.0225 822
60.0 0.0270 986
70.0 0.0315 1150
80.0 0.0360 1310
90.0 0.0405 1480
100 0.0450 1640
200 0.0901 3290
300 0.135 4930
400 0.180 6570
500 0.225 8220
600 0.270 9860
700 0.315 1.15 × 104
800 0.360 1.31 × 104
900 0.405 1.48 × 104
1000 0.450 1.64 × 104
2000 0.901 3.29 × 104
3000 1.35 4.93 × 104
4000 1.80 6.57 × 104
5000 2.25 8.22 × 104
6000 2.70 9.86 × 104
7000 3.15 1.15 × 105
8000 3.60 1.31 × 105
9000 4.05 1.48 × 105
1.00 × 104 4.50 1.64 × 105
1.81 × 104 8.14 2.97 × 105
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0385 899
40.0 0.0440 1030
50.0 0.0550 1280
60.0 0.0660 1540
70.0 0.0770 1800
80.0 0.0879 2050
90.0 0.0989 2310
100 0.110 2570
200 0.220 5140
300 0.330 7700
400 0.440 1.03 × 104
500 0.550 1.28 × 104
600 0.660 1.54 × 104
700 0.770 1.80 × 104
800 0.879 2.05 × 104
900 0.989 2.31 × 104
1000 1.10 2.57 × 104
2000 2.20 5.14 × 104
3000 3.30 7.70 × 104
4000 4.40 1.03 × 105
5000 5.50 1.28 × 105
6000 6.60 1.54 × 105
7000 7.70 1.80 × 105
7390 8.12 1.90 × 105
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0798 1290
40.0 0.0912 1480
50.0 0.114 1850
60.0 0.137 2220
70.0 0.160 2590
80.0 0.182 2960
90.0 0.205 3330
100 0.228 3700
200 0.456 7400
300 0.684 1.11 × 104
400 0.912 1.48 × 104
500 1.14 1.85 × 104
600 1.37 2.22 × 104
700 1.60 2.59 × 104
800 1.82 2.96 × 104
900 2.05 3.33 × 104
1000 2.28 3.70 × 104
2000 4.56 7.40 × 104
3000 6.84 1.11 × 105
3560 8.12 1.32 × 105
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.252 2300
40.0 0.288 2630
50.0 0.360 3290
60.0 0.432 3940
70.0 0.504 4600
80.0 0.576 5260
90.0 0.648 5920
100 0.720 6570
200 1.44 1.31 × 104
300 2.16 1.97 × 104
400 2.88 2.63 × 104
500 3.60 3.29 × 104
600 4.32 3.94 × 104
700 5.04 4.60 × 104
800 5.76 5.26 × 104
900 6.48 5.92 × 104
1000 7.20 6.57 × 104
1130 8.12 7.41 × 104
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.616 3600
40.0 0.704 4110
50.0 0.879 5140
60.0 1.06 6160
70.0 1.23 7190
80.0 1.41 8220
90.0 1.58 9240
100 1.76 1.03 × 104
200 3.52 2.05 × 104
300 5.28 3.08 × 104
400 7.04 4.11 × 104
462 8.12 4.74 × 104
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 1.28 5180
40.0 1.46 5920
50.0 1.82 7400
60.0 2.19 8870
70.0 2.55 1.04 × 104
80.0 2.92 1.18 × 104
90.0 3.28 1.33 × 104
100 3.65 1.48 × 104
200 7.29 2.96 × 104
223 8.12 3.29 × 104
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 2.37 7050
40.0 2.70 8050
50.0 3.38 1.01 × 104
60.0 4.05 1.21 × 104
70.0 4.73 1.41 × 104
80.0 5.41 1.61 × 104
90.0 6.08 1.81 × 104
100 6.76 2.01 × 104
120 8.12 2.42 × 104
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 4.03 9200
40.0 4.61 1.05 × 104
50.0 5.76 1.31 × 104
60.0 6.92 1.58 × 104
70.0 8.07 1.84 × 104
70.4 8.12 1.85 × 104
Steel I Beam: W8 × 35 (Wide Flange 8 inch tall × 35 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 6.46 1.16 × 104
40.0 7.39 1.33 × 104
44.0 8.12 1.46 × 104
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