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Wide Flange Steel I Beam: W8 × 48
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » Wide Flange Steel I Beam » W8 × 48
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 = 184 in4) for the W8 × 48 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 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 1.56 × 10-5 15.0
50.0 1.63 × 10-5 15.6
60.0 1.95 × 10-5 18.7
70.0 2.28 × 10-5 21.8
80.0 2.60 × 10-5 24.9
90.0 2.93 × 10-5 28.1
100 3.25 × 10-5 31.2
200 6.50 × 10-5 62.4
300 9.76 × 10-5 93.5
400 1.30 × 10-4 125
500 1.63 × 10-4 156
600 1.95 × 10-4 187
700 2.28 × 10-4 218
800 2.60 × 10-4 249
900 2.93 × 10-4 281
1000 3.25 × 10-4 312
2000 6.50 × 10-4 624
3000 9.76 × 10-4 935
4000 0.00130 1250
5000 0.00163 1560
6000 0.00195 1870
7000 0.00228 2180
8000 0.00260 2490
9000 0.00293 2810
1.00 × 104 0.00325 3120
2.00 × 104 0.00650 6240
3.00 × 104 0.00976 9350
4.00 × 104 0.0130 1.25 × 104
5.00 × 104 0.0163 1.56 × 104
6.00 × 104 0.0195 1.87 × 104
7.00 × 104 0.0228 2.18 × 104
8.00 × 104 0.0260 2.49 × 104
9.00 × 104 0.0293 2.81 × 104
1.00 × 105 0.0325 3.12 × 104
2.00 × 105 0.0650 6.24 × 104
3.00 × 105 0.0976 9.35 × 104
4.00 × 105 0.130 1.25 × 105
5.00 × 105 0.163 1.56 × 105
6.00 × 105 0.195 1.87 × 105
7.00 × 105 0.228 2.18 × 105
8.00 × 105 0.260 2.49 × 105
9.00 × 105 0.293 2.81 × 105
9.53 × 105 0.310 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 1.20 × 10-4 41.6
50.0 1.25 × 10-4 43.3
60.0 1.51 × 10-4 52.0
70.0 1.76 × 10-4 60.6
80.0 2.01 × 10-4 69.3
90.0 2.26 × 10-4 78.0
100 2.51 × 10-4 86.6
200 5.02 × 10-4 173
300 7.53 × 10-4 260
400 0.00100 346
500 0.00125 433
600 0.00151 520
700 0.00176 606
800 0.00201 693
900 0.00226 780
1000 0.00251 866
2000 0.00502 1730
3000 0.00753 2600
4000 0.0100 3460
5000 0.0125 4330
6000 0.0151 5200
7000 0.0176 6060
8000 0.0201 6930
9000 0.0226 7800
1.00 × 104 0.0251 8660
2.00 × 104 0.0502 1.73 × 104
3.00 × 104 0.0753 2.60 × 104
4.00 × 104 0.100 3.46 × 104
5.00 × 104 0.125 4.33 × 104
6.00 × 104 0.151 5.20 × 104
7.00 × 104 0.176 6.06 × 104
8.00 × 104 0.201 6.93 × 104
9.00 × 104 0.226 7.80 × 104
1.00 × 105 0.251 8.66 × 104
2.00 × 105 0.502 1.73 × 105
3.00 × 105 0.753 2.60 × 105
3.43 × 105 0.861 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.00193 166
50.0 0.00201 173
60.0 0.00241 208
70.0 0.00281 243
80.0 0.00321 277
90.0 0.00361 312
100 0.00401 346
200 0.00803 693
300 0.0120 1040
400 0.0161 1390
500 0.0201 1730
600 0.0241 2080
700 0.0281 2430
800 0.0321 2770
900 0.0361 3120
1000 0.0401 3460
2000 0.0803 6930
3000 0.120 1.04 × 104
4000 0.161 1.39 × 104
5000 0.201 1.73 × 104
6000 0.241 2.08 × 104
7000 0.281 2.43 × 104
8000 0.321 2.77 × 104
9000 0.361 3.12 × 104
1.00 × 104 0.401 3.46 × 104
2.00 × 104 0.803 6.93 × 104
3.00 × 104 1.20 1.04 × 105
4.00 × 104 1.61 1.39 × 105
5.00 × 104 2.01 1.73 × 105
6.00 × 104 2.41 2.08 × 105
7.00 × 104 2.81 2.43 × 105
8.00 × 104 3.21 2.77 × 105
8.57 × 104 3.44 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.00976 374
50.0 0.0102 390
60.0 0.0122 468
70.0 0.0142 546
80.0 0.0163 624
90.0 0.0183 702
100 0.0203 780
200 0.0406 1560
300 0.0610 2340
400 0.0813 3120
500 0.102 3900
600 0.122 4680
700 0.142 5460
800 0.163 6240
900 0.183 7020
1000 0.203 7800
2000 0.406 1.56 × 104
3000 0.610 2.34 × 104
4000 0.813 3.12 × 104
5000 1.02 3.90 × 104
6000 1.22 4.68 × 104
7000 1.42 5.46 × 104
8000 1.63 6.24 × 104
9000 1.83 7.02 × 104
1.00 × 104 2.03 7.80 × 104
2.00 × 104 4.06 1.56 × 105
3.00 × 104 6.10 2.34 × 105
3.81 × 104 7.74 2.97 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.0308 665
50.0 0.0321 693
60.0 0.0385 832
70.0 0.0450 970
80.0 0.0514 1110
90.0 0.0578 1250
100 0.0642 1390
200 0.128 2770
300 0.193 4160
400 0.257 5540
500 0.321 6930
600 0.385 8320
700 0.450 9700
800 0.514 1.11 × 104
900 0.578 1.25 × 104
1000 0.642 1.39 × 104
2000 1.28 2.77 × 104
3000 1.93 4.16 × 104
4000 2.57 5.54 × 104
5000 3.21 6.93 × 104
6000 3.85 8.32 × 104
7000 4.50 9.70 × 104
8000 5.14 1.11 × 105
9000 5.78 1.25 × 105
1.00 × 104 6.42 1.39 × 105
1.32 × 104 8.50 1.83 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.0753 1040
50.0 0.0784 1080
60.0 0.0941 1300
70.0 0.110 1520
80.0 0.125 1730
90.0 0.141 1950
100 0.157 2170
200 0.314 4330
300 0.470 6500
400 0.627 8660
500 0.784 1.08 × 104
600 0.941 1.30 × 104
700 1.10 1.52 × 104
800 1.25 1.73 × 104
900 1.41 1.95 × 104
1000 1.57 2.17 × 104
2000 3.14 4.33 × 104
3000 4.70 6.50 × 104
4000 6.27 8.66 × 104
5000 7.84 1.08 × 105
5420 8.50 1.17 × 105
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.156 1500
50.0 0.163 1560
60.0 0.195 1870
70.0 0.228 2180
80.0 0.260 2490
90.0 0.293 2810
100 0.325 3120
200 0.650 6240
300 0.976 9350
400 1.30 1.25 × 104
500 1.63 1.56 × 104
600 1.95 1.87 × 104
700 2.28 2.18 × 104
800 2.60 2.49 × 104
900 2.93 2.81 × 104
1000 3.25 3.12 × 104
2000 6.50 6.24 × 104
2610 8.50 8.15 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 0.493 2660
50.0 0.514 2770
60.0 0.617 3330
70.0 0.719 3880
80.0 0.822 4430
90.0 0.925 4990
100 1.03 5540
200 2.06 1.11 × 104
300 3.08 1.66 × 104
400 4.11 2.22 × 104
500 5.14 2.77 × 104
600 6.17 3.33 × 104
700 7.19 3.88 × 104
800 8.22 4.43 × 104
827 8.50 4.58 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 1.20 4160
50.0 1.25 4330
60.0 1.51 5200
70.0 1.76 6060
80.0 2.01 6930
90.0 2.26 7800
100 2.51 8660
200 5.02 1.73 × 104
300 7.53 2.60 × 104
339 8.50 2.93 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 2.50 5990
50.0 2.60 6240
60.0 3.12 7480
70.0 3.64 8730
80.0 4.16 9980
90.0 4.68 1.12 × 104
100 5.20 1.25 × 104
163 8.50 2.04 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 4.63 8150
50.0 4.82 8490
60.0 5.78 1.02 × 104
70.0 6.75 1.19 × 104
80.0 7.71 1.36 × 104
88.2 8.50 1.50 × 104
Steel I Beam: W8 × 48 (Wide Flange 8 inch tall × 48 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
48.0 7.89 1.06 × 104
50.0 8.22 1.11 × 104
51.7 8.50 1.15 × 104
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