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Wide Flange Steel I Beam: W6 × 25
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W6 × 25
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 span and the maximum normal stress stress_max occuring at the second and third support of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 53.4 in4) for the W6 × 25 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: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 1.46 × 10-5 16.1
30.0 1.76 × 10-5 19.4
40.0 2.34 × 10-5 25.8
50.0 2.93 × 10-5 32.3
60.0 3.51 × 10-5 38.7
70.0 4.10 × 10-5 45.2
80.0 4.68 × 10-5 51.6
90.0 5.27 × 10-5 58.1
100 5.85 × 10-5 64.5
200 1.17 × 10-4 129
300 1.76 × 10-4 194
400 2.34 × 10-4 258
500 2.93 × 10-4 323
600 3.51 × 10-4 387
700 4.10 × 10-4 452
800 4.68 × 10-4 516
900 5.27 × 10-4 581
1000 5.85 × 10-4 645
2000 0.00117 1290
3000 0.00176 1940
4000 0.00234 2580
5000 0.00293 3230
6000 0.00351 3870
7000 0.00410 4520
8000 0.00468 5160
9000 0.00527 5810
1.00 × 104 0.00585 6450
2.00 × 104 0.0117 1.29 × 104
3.00 × 104 0.0176 1.94 × 104
4.00 × 104 0.0234 2.58 × 104
5.00 × 104 0.0293 3.23 × 104
6.00 × 104 0.0351 3.87 × 104
7.00 × 104 0.0410 4.52 × 104
8.00 × 104 0.0468 5.16 × 104
9.00 × 104 0.0527 5.81 × 104
1.00 × 105 0.0585 6.45 × 104
2.00 × 105 0.117 1.29 × 105
3.00 × 105 0.176 1.94 × 105
4.00 × 105 0.234 2.58 × 105
4.60 × 105 0.269 2.97 × 105
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 1.13 × 10-4 44.8
30.0 1.35 × 10-4 53.8
40.0 1.81 × 10-4 71.7
50.0 2.26 × 10-4 89.6
60.0 2.71 × 10-4 108
70.0 3.16 × 10-4 125
80.0 3.61 × 10-4 143
90.0 4.06 × 10-4 161
100 4.52 × 10-4 179
200 9.03 × 10-4 358
300 0.00135 538
400 0.00181 717
500 0.00226 896
600 0.00271 1080
700 0.00316 1250
800 0.00361 1430
900 0.00406 1610
1000 0.00452 1790
2000 0.00903 3580
3000 0.0135 5380
4000 0.0181 7170
5000 0.0226 8960
6000 0.0271 1.08 × 104
7000 0.0316 1.25 × 104
8000 0.0361 1.43 × 104
9000 0.0406 1.61 × 104
1.00 × 104 0.0452 1.79 × 104
2.00 × 104 0.0903 3.58 × 104
3.00 × 104 0.135 5.38 × 104
4.00 × 104 0.181 7.17 × 104
5.00 × 104 0.226 8.96 × 104
6.00 × 104 0.271 1.08 × 105
7.00 × 104 0.316 1.25 × 105
8.00 × 104 0.361 1.43 × 105
9.00 × 104 0.406 1.61 × 105
1.00 × 105 0.452 1.79 × 105
1.66 × 105 0.748 2.97 × 105
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 0.00181 179
30.0 0.00217 215
40.0 0.00289 287
50.0 0.00361 358
60.0 0.00433 430
70.0 0.00506 502
80.0 0.00578 573
90.0 0.00650 645
100 0.00722 717
200 0.0144 1430
300 0.0217 2150
400 0.0289 2870
500 0.0361 3580
600 0.0433 4300
700 0.0506 5020
800 0.0578 5730
900 0.0650 6450
1000 0.0722 7170
2000 0.144 1.43 × 104
3000 0.217 2.15 × 104
4000 0.289 2.87 × 104
5000 0.361 3.58 × 104
6000 0.433 4.30 × 104
7000 0.506 5.02 × 104
8000 0.578 5.73 × 104
9000 0.650 6.45 × 104
1.00 × 104 0.722 7.17 × 104
2.00 × 104 1.44 1.43 × 105
3.00 × 104 2.17 2.15 × 105
4.00 × 104 2.89 2.87 × 105
4.14 × 104 2.99 2.97 × 105
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 0.00914 403
30.0 0.0110 484
40.0 0.0146 645
50.0 0.0183 806
60.0 0.0219 968
70.0 0.0256 1130
80.0 0.0293 1290
90.0 0.0329 1450
100 0.0366 1610
200 0.0731 3230
300 0.110 4840
400 0.146 6450
500 0.183 8060
600 0.219 9680
700 0.256 1.13 × 104
800 0.293 1.29 × 104
900 0.329 1.45 × 104
1000 0.366 1.61 × 104
2000 0.731 3.23 × 104
3000 1.10 4.84 × 104
4000 1.46 6.45 × 104
5000 1.83 8.06 × 104
6000 2.19 9.68 × 104
7000 2.56 1.13 × 105
8000 2.93 1.29 × 105
9000 3.29 1.45 × 105
1.00 × 104 3.66 1.61 × 105
1.84 × 104 6.74 2.97 × 105
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 0.0289 717
30.0 0.0347 860
40.0 0.0462 1150
50.0 0.0578 1430
60.0 0.0694 1720
70.0 0.0809 2010
80.0 0.0925 2290
90.0 0.104 2580
100 0.116 2870
200 0.231 5730
300 0.347 8600
400 0.462 1.15 × 104
500 0.578 1.43 × 104
600 0.694 1.72 × 104
700 0.809 2.01 × 104
800 0.925 2.29 × 104
900 1.04 2.58 × 104
1000 1.16 2.87 × 104
2000 2.31 5.73 × 104
3000 3.47 8.60 × 104
4000 4.62 1.15 × 105
5000 5.78 1.43 × 105
5520 6.38 1.58 × 105
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 0.0706 1120
30.0 0.0847 1340
40.0 0.113 1790
50.0 0.141 2240
60.0 0.169 2690
70.0 0.198 3140
80.0 0.226 3580
90.0 0.254 4030
100 0.282 4480
200 0.564 8960
300 0.847 1.34 × 104
400 1.13 1.79 × 104
500 1.41 2.24 × 104
600 1.69 2.69 × 104
700 1.98 3.14 × 104
800 2.26 3.58 × 104
900 2.54 4.03 × 104
1000 2.82 4.48 × 104
2000 5.64 8.96 × 104
2260 6.38 1.01 × 105
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 0.146 1610
30.0 0.176 1940
40.0 0.234 2580
50.0 0.293 3230
60.0 0.351 3870
70.0 0.410 4520
80.0 0.468 5160
90.0 0.527 5810
100 0.585 6450
200 1.17 1.29 × 104
300 1.76 1.94 × 104
400 2.34 2.58 × 104
500 2.93 3.23 × 104
600 3.51 3.87 × 104
700 4.10 4.52 × 104
800 4.68 5.16 × 104
900 5.27 5.81 × 104
1000 5.85 6.45 × 104
1090 6.38 7.03 × 104
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 0.462 2870
30.0 0.555 3440
40.0 0.740 4590
50.0 0.925 5730
60.0 1.11 6880
70.0 1.29 8030
80.0 1.48 9180
90.0 1.66 1.03 × 104
100 1.85 1.15 × 104
200 3.70 2.29 × 104
300 5.55 3.44 × 104
345 6.38 3.96 × 104
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 1.13 4480
30.0 1.35 5380
40.0 1.81 7170
50.0 2.26 8960
60.0 2.71 1.08 × 104
70.0 3.16 1.25 × 104
80.0 3.61 1.43 × 104
90.0 4.06 1.61 × 104
100 4.52 1.79 × 104
141 6.38 2.53 × 104
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 2.34 6450
30.0 2.81 7740
40.0 3.75 1.03 × 104
50.0 4.68 1.29 × 104
60.0 5.62 1.55 × 104
68.1 6.38 1.76 × 104
Steel I Beam: W6 × 25 (Wide Flange 6 inch tall × 25 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
25.0 4.34 8780
30.0 5.20 1.05 × 104
36.8 6.38 1.29 × 104
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