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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two 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 two equal spans, we compute the displacement at the middle of each span w_mid and the maximum normal stress stress_max 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 = 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 6.60 × 10-6 15.1
40.0 7.54 × 10-6 17.3
50.0 9.42 × 10-6 21.6
60.0 1.13 × 10-5 25.9
70.0 1.32 × 10-5 30.2
80.0 1.51 × 10-5 34.5
90.0 1.70 × 10-5 38.8
100 1.88 × 10-5 43.2
200 3.77 × 10-5 86.3
300 5.65 × 10-5 129
400 7.54 × 10-5 173
500 9.42 × 10-5 216
600 1.13 × 10-4 259
700 1.32 × 10-4 302
800 1.51 × 10-4 345
900 1.70 × 10-4 388
1000 1.88 × 10-4 432
2000 3.77 × 10-4 863
3000 5.65 × 10-4 1290
4000 7.54 × 10-4 1730
5000 9.42 × 10-4 2160
6000 0.00113 2590
7000 0.00132 3020
8000 0.00151 3450
9000 0.00170 3880
1.00 × 104 0.00188 4320
2.00 × 104 0.00377 8630
3.00 × 104 0.00565 1.29 × 104
4.00 × 104 0.00754 1.73 × 104
5.00 × 104 0.00942 2.16 × 104
6.00 × 104 0.0113 2.59 × 104
7.00 × 104 0.0132 3.02 × 104
8.00 × 104 0.0151 3.45 × 104
9.00 × 104 0.0170 3.88 × 104
1.00 × 105 0.0188 4.32 × 104
2.00 × 105 0.0377 8.63 × 104
3.00 × 105 0.0565 1.29 × 105
4.00 × 105 0.0754 1.73 × 105
5.00 × 105 0.0942 2.16 × 105
6.00 × 105 0.113 2.59 × 105
6.88 × 105 0.130 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 5.09 × 10-5 42.0
40.0 5.82 × 10-5 48.0
50.0 7.27 × 10-5 59.9
60.0 8.73 × 10-5 71.9
70.0 1.02 × 10-4 83.9
80.0 1.16 × 10-4 95.9
90.0 1.31 × 10-4 108
100 1.45 × 10-4 120
200 2.91 × 10-4 240
300 4.36 × 10-4 360
400 5.82 × 10-4 480
500 7.27 × 10-4 599
600 8.73 × 10-4 719
700 0.00102 839
800 0.00116 959
900 0.00131 1080
1000 0.00145 1200
2000 0.00291 2400
3000 0.00436 3600
4000 0.00582 4800
5000 0.00727 5990
6000 0.00873 7190
7000 0.0102 8390
8000 0.0116 9590
9000 0.0131 1.08 × 104
1.00 × 104 0.0145 1.20 × 104
2.00 × 104 0.0291 2.40 × 104
3.00 × 104 0.0436 3.60 × 104
4.00 × 104 0.0582 4.80 × 104
5.00 × 104 0.0727 5.99 × 104
6.00 × 104 0.0873 7.19 × 104
7.00 × 104 0.102 8.39 × 104
8.00 × 104 0.116 9.59 × 104
9.00 × 104 0.131 1.08 × 105
1.00 × 105 0.145 1.20 × 105
2.00 × 105 0.291 2.40 × 105
2.48 × 105 0.360 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 8.14 × 10-4 168
40.0 9.31 × 10-4 192
50.0 0.00116 240
60.0 0.00140 288
70.0 0.00163 336
80.0 0.00186 384
90.0 0.00209 432
100 0.00233 480
200 0.00465 959
300 0.00698 1440
400 0.00931 1920
500 0.0116 2400
600 0.0140 2880
700 0.0163 3360
800 0.0186 3840
900 0.0209 4320
1000 0.0233 4800
2000 0.0465 9590
3000 0.0698 1.44 × 104
4000 0.0931 1.92 × 104
5000 0.116 2.40 × 104
6000 0.140 2.88 × 104
7000 0.163 3.36 × 104
8000 0.186 3.84 × 104
9000 0.209 4.32 × 104
1.00 × 104 0.233 4.80 × 104
2.00 × 104 0.465 9.59 × 104
3.00 × 104 0.698 1.44 × 105
4.00 × 104 0.931 1.92 × 105
5.00 × 104 1.16 2.40 × 105
6.00 × 104 1.40 2.88 × 105
6.19 × 104 1.44 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 0.00412 378
40.0 0.00471 432
50.0 0.00589 539
60.0 0.00707 647
70.0 0.00825 755
80.0 0.00942 863
90.0 0.0106 971
100 0.0118 1080
200 0.0236 2160
300 0.0353 3240
400 0.0471 4320
500 0.0589 5390
600 0.0707 6470
700 0.0825 7550
800 0.0942 8630
900 0.106 9710
1000 0.118 1.08 × 104
2000 0.236 2.16 × 104
3000 0.353 3.24 × 104
4000 0.471 4.32 × 104
5000 0.589 5.39 × 104
6000 0.707 6.47 × 104
7000 0.825 7.55 × 104
8000 0.942 8.63 × 104
9000 1.06 9.71 × 104
1.00 × 104 1.18 1.08 × 105
2.00 × 104 2.36 2.16 × 105
2.75 × 104 3.24 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 0.0130 671
40.0 0.0149 767
50.0 0.0186 959
60.0 0.0223 1150
70.0 0.0261 1340
80.0 0.0298 1530
90.0 0.0335 1730
100 0.0372 1920
200 0.0745 3840
300 0.112 5750
400 0.149 7670
500 0.186 9590
600 0.223 1.15 × 104
700 0.261 1.34 × 104
800 0.298 1.53 × 104
900 0.335 1.73 × 104
1000 0.372 1.92 × 104
2000 0.745 3.84 × 104
3000 1.12 5.75 × 104
4000 1.49 7.67 × 104
5000 1.86 9.59 × 104
6000 2.23 1.15 × 105
7000 2.61 1.34 × 105
8000 2.98 1.53 × 105
9000 3.35 1.73 × 105
1.00 × 104 3.72 1.92 × 105
1.55 × 104 5.76 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 0.0318 1050
40.0 0.0364 1200
50.0 0.0454 1500
60.0 0.0545 1800
70.0 0.0636 2100
80.0 0.0727 2400
90.0 0.0818 2700
100 0.0909 3000
200 0.182 5990
300 0.273 8990
400 0.364 1.20 × 104
500 0.454 1.50 × 104
600 0.545 1.80 × 104
700 0.636 2.10 × 104
800 0.727 2.40 × 104
900 0.818 2.70 × 104
1000 0.909 3.00 × 104
2000 1.82 5.99 × 104
3000 2.73 8.99 × 104
4000 3.64 1.20 × 105
5000 4.54 1.50 × 105
6000 5.45 1.80 × 105
7000 6.36 2.10 × 105
8000 7.27 2.40 × 105
8930 8.12 2.68 × 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 0.0660 1510
40.0 0.0754 1730
50.0 0.0942 2160
60.0 0.113 2590
70.0 0.132 3020
80.0 0.151 3450
90.0 0.170 3880
100 0.188 4320
200 0.377 8630
300 0.565 1.29 × 104
400 0.754 1.73 × 104
500 0.942 2.16 × 104
600 1.13 2.59 × 104
700 1.32 3.02 × 104
800 1.51 3.45 × 104
900 1.70 3.88 × 104
1000 1.88 4.32 × 104
2000 3.77 8.63 × 104
3000 5.65 1.29 × 105
4000 7.54 1.73 × 105
4310 8.12 1.86 × 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 0.208 2690
40.0 0.238 3070
50.0 0.298 3840
60.0 0.357 4600
70.0 0.417 5370
80.0 0.477 6140
90.0 0.536 6910
100 0.596 7670
200 1.19 1.53 × 104
300 1.79 2.30 × 104
400 2.38 3.07 × 104
500 2.98 3.84 × 104
600 3.57 4.60 × 104
700 4.17 5.37 × 104
800 4.77 6.14 × 104
900 5.36 6.91 × 104
1000 5.96 7.67 × 104
1360 8.12 1.05 × 105
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 0.509 4200
40.0 0.582 4800
50.0 0.727 5990
60.0 0.873 7190
70.0 1.02 8390
80.0 1.16 9590
90.0 1.31 1.08 × 104
100 1.45 1.20 × 104
200 2.91 2.40 × 104
300 4.36 3.60 × 104
400 5.82 4.80 × 104
500 7.27 5.99 × 104
558 8.12 6.69 × 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 1.06 6040
40.0 1.21 6910
50.0 1.51 8630
60.0 1.81 1.04 × 104
70.0 2.11 1.21 × 104
80.0 2.41 1.38 × 104
90.0 2.71 1.55 × 104
100 3.02 1.73 × 104
200 6.03 3.45 × 104
269 8.12 4.65 × 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 1.96 8220
40.0 2.23 9400
50.0 2.79 1.17 × 104
60.0 3.35 1.41 × 104
70.0 3.91 1.64 × 104
80.0 4.47 1.88 × 104
90.0 5.03 2.11 × 104
100 5.59 2.35 × 104
145 8.12 3.42 × 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 3.34 1.07 × 104
40.0 3.81 1.23 × 104
50.0 4.77 1.53 × 104
60.0 5.72 1.84 × 104
70.0 6.67 2.15 × 104
80.0 7.62 2.46 × 104
85.2 8.12 2.61 × 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 5.34 1.36 × 104
40.0 6.11 1.55 × 104
50.0 7.63 1.94 × 104
53.2 8.12 2.07 × 104
Additional Information
Related Pages
FREE Publications
STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

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A white paper to assist in the evaluation of 3D scanning hardware solutions.

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

more publications