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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four 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 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 = 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 1.36 × 10-5 17.3
30.0 1.63 × 10-5 20.7
40.0 2.17 × 10-5 27.6
50.0 2.71 × 10-5 34.5
60.0 3.25 × 10-5 41.5
70.0 3.80 × 10-5 48.4
80.0 4.34 × 10-5 55.3
90.0 4.88 × 10-5 62.2
100 5.42 × 10-5 69.1
200 1.08 × 10-4 138
300 1.63 × 10-4 207
400 2.17 × 10-4 276
500 2.71 × 10-4 345
600 3.25 × 10-4 415
700 3.80 × 10-4 484
800 4.34 × 10-4 553
900 4.88 × 10-4 622
1000 5.42 × 10-4 691
2000 0.00108 1380
3000 0.00163 2070
4000 0.00217 2760
5000 0.00271 3450
6000 0.00325 4150
7000 0.00380 4840
8000 0.00434 5530
9000 0.00488 6220
1.00 × 104 0.00542 6910
2.00 × 104 0.0108 1.38 × 104
3.00 × 104 0.0163 2.07 × 104
4.00 × 104 0.0217 2.76 × 104
5.00 × 104 0.0271 3.45 × 104
6.00 × 104 0.0325 4.15 × 104
7.00 × 104 0.0380 4.84 × 104
8.00 × 104 0.0434 5.53 × 104
9.00 × 104 0.0488 6.22 × 104
1.00 × 105 0.0542 6.91 × 104
2.00 × 105 0.108 1.38 × 105
3.00 × 105 0.163 2.07 × 105
4.00 × 105 0.217 2.76 × 105
4.30 × 105 0.233 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 1.05 × 10-4 48.0
30.0 1.25 × 10-4 57.6
40.0 1.67 × 10-4 76.8
50.0 2.09 × 10-4 96.0
60.0 2.51 × 10-4 115
70.0 2.93 × 10-4 134
80.0 3.35 × 10-4 154
90.0 3.76 × 10-4 173
100 4.18 × 10-4 192
200 8.37 × 10-4 384
300 0.00125 576
400 0.00167 768
500 0.00209 960
600 0.00251 1150
700 0.00293 1340
800 0.00335 1540
900 0.00376 1730
1000 0.00418 1920
2000 0.00837 3840
3000 0.0125 5760
4000 0.0167 7680
5000 0.0209 9600
6000 0.0251 1.15 × 104
7000 0.0293 1.34 × 104
8000 0.0335 1.54 × 104
9000 0.0376 1.73 × 104
1.00 × 104 0.0418 1.92 × 104
2.00 × 104 0.0837 3.84 × 104
3.00 × 104 0.125 5.76 × 104
4.00 × 104 0.167 7.68 × 104
5.00 × 104 0.209 9.60 × 104
6.00 × 104 0.251 1.15 × 105
7.00 × 104 0.293 1.34 × 105
8.00 × 104 0.335 1.54 × 105
9.00 × 104 0.376 1.73 × 105
1.00 × 105 0.418 1.92 × 105
1.55 × 105 0.647 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 0.00167 192
30.0 0.00201 230
40.0 0.00268 307
50.0 0.00335 384
60.0 0.00402 461
70.0 0.00469 537
80.0 0.00535 614
90.0 0.00602 691
100 0.00669 768
200 0.0134 1540
300 0.0201 2300
400 0.0268 3070
500 0.0335 3840
600 0.0402 4610
700 0.0469 5370
800 0.0535 6140
900 0.0602 6910
1000 0.0669 7680
2000 0.134 1.54 × 104
3000 0.201 2.30 × 104
4000 0.268 3.07 × 104
5000 0.335 3.84 × 104
6000 0.402 4.61 × 104
7000 0.469 5.37 × 104
8000 0.535 6.14 × 104
9000 0.602 6.91 × 104
1.00 × 104 0.669 7.68 × 104
2.00 × 104 1.34 1.54 × 105
3.00 × 104 2.01 2.30 × 105
3.87 × 104 2.59 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 0.00847 432
30.0 0.0102 518
40.0 0.0136 691
50.0 0.0169 864
60.0 0.0203 1040
70.0 0.0237 1210
80.0 0.0271 1380
90.0 0.0305 1550
100 0.0339 1730
200 0.0678 3450
300 0.102 5180
400 0.136 6910
500 0.169 8640
600 0.203 1.04 × 104
700 0.237 1.21 × 104
800 0.271 1.38 × 104
900 0.305 1.55 × 104
1000 0.339 1.73 × 104
2000 0.678 3.45 × 104
3000 1.02 5.18 × 104
4000 1.36 6.91 × 104
5000 1.69 8.64 × 104
6000 2.03 1.04 × 105
7000 2.37 1.21 × 105
8000 2.71 1.38 × 105
9000 3.05 1.55 × 105
1.00 × 104 3.39 1.73 × 105
1.72 × 104 5.83 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 0.0268 768
30.0 0.0321 921
40.0 0.0428 1230
50.0 0.0535 1540
60.0 0.0643 1840
70.0 0.0750 2150
80.0 0.0857 2460
90.0 0.0964 2760
100 0.107 3070
200 0.214 6140
300 0.321 9210
400 0.428 1.23 × 104
500 0.535 1.54 × 104
600 0.643 1.84 × 104
700 0.750 2.15 × 104
800 0.857 2.46 × 104
900 0.964 2.76 × 104
1000 1.07 3.07 × 104
2000 2.14 6.14 × 104
3000 3.21 9.21 × 104
4000 4.28 1.23 × 105
5000 5.35 1.54 × 105
5960 6.38 1.83 × 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 0.0654 1200
30.0 0.0784 1440
40.0 0.105 1920
50.0 0.131 2400
60.0 0.157 2880
70.0 0.183 3360
80.0 0.209 3840
90.0 0.235 4320
100 0.261 4800
200 0.523 9600
300 0.784 1.44 × 104
400 1.05 1.92 × 104
500 1.31 2.40 × 104
600 1.57 2.88 × 104
700 1.83 3.36 × 104
800 2.09 3.84 × 104
900 2.35 4.32 × 104
1000 2.61 4.80 × 104
2000 5.23 9.60 × 104
2440 6.38 1.17 × 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 0.136 1730
30.0 0.163 2070
40.0 0.217 2760
50.0 0.271 3450
60.0 0.325 4150
70.0 0.380 4840
80.0 0.434 5530
90.0 0.488 6220
100 0.542 6910
200 1.08 1.38 × 104
300 1.63 2.07 × 104
400 2.17 2.76 × 104
500 2.71 3.45 × 104
600 3.25 4.15 × 104
700 3.80 4.84 × 104
800 4.34 5.53 × 104
900 4.88 6.22 × 104
1000 5.42 6.91 × 104
1180 6.38 8.13 × 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 0.428 3070
30.0 0.514 3690
40.0 0.685 4910
50.0 0.857 6140
60.0 1.03 7370
70.0 1.20 8600
80.0 1.37 9830
90.0 1.54 1.11 × 104
100 1.71 1.23 × 104
200 3.43 2.46 × 104
300 5.14 3.69 × 104
372 6.38 4.57 × 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 1.05 4800
30.0 1.25 5760
40.0 1.67 7680
50.0 2.09 9600
60.0 2.51 1.15 × 104
70.0 2.93 1.34 × 104
80.0 3.35 1.54 × 104
90.0 3.76 1.73 × 104
100 4.18 1.92 × 104
153 6.38 2.93 × 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 2.17 6910
30.0 2.60 8290
40.0 3.47 1.11 × 104
50.0 4.34 1.38 × 104
60.0 5.20 1.66 × 104
70.0 6.07 1.93 × 104
73.5 6.38 2.03 × 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 4.02 9400
30.0 4.82 1.13 × 104
39.7 6.38 1.49 × 104
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