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Wide Flange Steel I Beam: W8 × 28
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » Wide Flange Steel I Beam » W8 × 28
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 = 98.0 in4) for the W8 × 28 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 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 1.71 × 10-5 15.5
30.0 1.83 × 10-5 16.7
40.0 2.44 × 10-5 22.2
50.0 3.05 × 10-5 27.8
60.0 3.66 × 10-5 33.3
70.0 4.27 × 10-5 38.9
80.0 4.88 × 10-5 44.4
90.0 5.50 × 10-5 50.0
100 6.11 × 10-5 55.5
200 1.22 × 10-4 111
300 1.83 × 10-4 167
400 2.44 × 10-4 222
500 3.05 × 10-4 278
600 3.66 × 10-4 333
700 4.27 × 10-4 389
800 4.88 × 10-4 444
900 5.50 × 10-4 500
1000 6.11 × 10-4 555
2000 0.00122 1110
3000 0.00183 1670
4000 0.00244 2220
5000 0.00305 2780
6000 0.00366 3330
7000 0.00427 3890
8000 0.00488 4440
9000 0.00550 5000
1.00 × 104 0.00611 5550
2.00 × 104 0.0122 1.11 × 104
3.00 × 104 0.0183 1.67 × 104
4.00 × 104 0.0244 2.22 × 104
5.00 × 104 0.0305 2.78 × 104
6.00 × 104 0.0366 3.33 × 104
7.00 × 104 0.0427 3.89 × 104
8.00 × 104 0.0488 4.44 × 104
9.00 × 104 0.0550 5.00 × 104
1.00 × 105 0.0611 5.55 × 104
2.00 × 105 0.122 1.11 × 105
3.00 × 105 0.183 1.67 × 105
4.00 × 105 0.244 2.22 × 105
5.00 × 105 0.305 2.78 × 105
5.35 × 105 0.327 2.97 × 105
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 1.32 × 10-4 43.2
30.0 1.41 × 10-4 46.3
40.0 1.88 × 10-4 61.7
50.0 2.36 × 10-4 77.1
60.0 2.83 × 10-4 92.5
70.0 3.30 × 10-4 108
80.0 3.77 × 10-4 123
90.0 4.24 × 10-4 139
100 4.71 × 10-4 154
200 9.42 × 10-4 308
300 0.00141 463
400 0.00188 617
500 0.00236 771
600 0.00283 925
700 0.00330 1080
800 0.00377 1230
900 0.00424 1390
1000 0.00471 1540
2000 0.00942 3080
3000 0.0141 4630
4000 0.0188 6170
5000 0.0236 7710
6000 0.0283 9250
7000 0.0330 1.08 × 104
8000 0.0377 1.23 × 104
9000 0.0424 1.39 × 104
1.00 × 104 0.0471 1.54 × 104
2.00 × 104 0.0942 3.08 × 104
3.00 × 104 0.141 4.63 × 104
4.00 × 104 0.188 6.17 × 104
5.00 × 104 0.236 7.71 × 104
6.00 × 104 0.283 9.25 × 104
7.00 × 104 0.330 1.08 × 105
8.00 × 104 0.377 1.23 × 105
9.00 × 104 0.424 1.39 × 105
1.00 × 105 0.471 1.54 × 105
1.93 × 105 0.907 2.97 × 105
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 0.00211 173
30.0 0.00226 185
40.0 0.00302 247
50.0 0.00377 308
60.0 0.00452 370
70.0 0.00528 432
80.0 0.00603 493
90.0 0.00678 555
100 0.00754 617
200 0.0151 1230
300 0.0226 1850
400 0.0302 2470
500 0.0377 3080
600 0.0452 3700
700 0.0528 4320
800 0.0603 4930
900 0.0678 5550
1000 0.0754 6170
2000 0.151 1.23 × 104
3000 0.226 1.85 × 104
4000 0.302 2.47 × 104
5000 0.377 3.08 × 104
6000 0.452 3.70 × 104
7000 0.528 4.32 × 104
8000 0.603 4.93 × 104
9000 0.678 5.55 × 104
1.00 × 104 0.754 6.17 × 104
2.00 × 104 1.51 1.23 × 105
3.00 × 104 2.26 1.85 × 105
4.00 × 104 3.02 2.47 × 105
4.82 × 104 3.63 2.97 × 105
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 0.0107 389
30.0 0.0114 416
40.0 0.0153 555
50.0 0.0191 694
60.0 0.0229 833
70.0 0.0267 972
80.0 0.0305 1110
90.0 0.0343 1250
100 0.0382 1390
200 0.0763 2780
300 0.114 4160
400 0.153 5550
500 0.191 6940
600 0.229 8330
700 0.267 9720
800 0.305 1.11 × 104
900 0.343 1.25 × 104
1000 0.382 1.39 × 104
2000 0.763 2.78 × 104
3000 1.14 4.16 × 104
4000 1.53 5.55 × 104
5000 1.91 6.94 × 104
6000 2.29 8.33 × 104
7000 2.67 9.72 × 104
8000 3.05 1.11 × 105
9000 3.43 1.25 × 105
1.00 × 104 3.82 1.39 × 105
2.00 × 104 7.63 2.78 × 105
2.14 × 104 8.17 2.97 × 105
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 0.0338 691
30.0 0.0362 740
40.0 0.0482 987
50.0 0.0603 1230
60.0 0.0724 1480
70.0 0.0844 1730
80.0 0.0965 1970
90.0 0.109 2220
100 0.121 2470
200 0.241 4930
300 0.362 7400
400 0.482 9870
500 0.603 1.23 × 104
600 0.724 1.48 × 104
700 0.844 1.73 × 104
800 0.965 1.97 × 104
900 1.09 2.22 × 104
1000 1.21 2.47 × 104
2000 2.41 4.93 × 104
3000 3.62 7.40 × 104
4000 4.82 9.87 × 104
5000 6.03 1.23 × 105
6000 7.24 1.48 × 105
6680 8.06 1.65 × 105
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 0.0824 1080
30.0 0.0883 1160
40.0 0.118 1540
50.0 0.147 1930
60.0 0.177 2310
70.0 0.206 2700
80.0 0.236 3080
90.0 0.265 3470
100 0.294 3860
200 0.589 7710
300 0.883 1.16 × 104
400 1.18 1.54 × 104
500 1.47 1.93 × 104
600 1.77 2.31 × 104
700 2.06 2.70 × 104
800 2.36 3.08 × 104
900 2.65 3.47 × 104
1000 2.94 3.86 × 104
2000 5.89 7.71 × 104
2740 8.06 1.06 × 105
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 0.171 1550
30.0 0.183 1670
40.0 0.244 2220
50.0 0.305 2780
60.0 0.366 3330
70.0 0.427 3890
80.0 0.488 4440
90.0 0.550 5000
100 0.611 5550
200 1.22 1.11 × 104
300 1.83 1.67 × 104
400 2.44 2.22 × 104
500 3.05 2.78 × 104
600 3.66 3.33 × 104
700 4.27 3.89 × 104
800 4.88 4.44 × 104
900 5.50 5.00 × 104
1000 6.11 5.55 × 104
1320 8.06 7.33 × 104
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 0.540 2760
30.0 0.579 2960
40.0 0.772 3950
50.0 0.965 4930
60.0 1.16 5920
70.0 1.35 6910
80.0 1.54 7900
90.0 1.74 8880
100 1.93 9870
200 3.86 1.97 × 104
300 5.79 2.96 × 104
400 7.72 3.95 × 104
418 8.06 4.12 × 104
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 1.32 4320
30.0 1.41 4630
40.0 1.88 6170
50.0 2.36 7710
60.0 2.83 9250
70.0 3.30 1.08 × 104
80.0 3.77 1.23 × 104
90.0 4.24 1.39 × 104
100 4.71 1.54 × 104
171 8.06 2.64 × 104
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 2.74 6220
30.0 2.93 6660
40.0 3.91 8880
50.0 4.88 1.11 × 104
60.0 5.86 1.33 × 104
70.0 6.84 1.55 × 104
80.0 7.82 1.78 × 104
82.5 8.06 1.83 × 104
Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
28.0 5.07 8460
30.0 5.43 9070
40.0 7.24 1.21 × 104
44.5 8.06 1.35 × 104
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