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Wide Flange Steel I Beam: W12 × 26
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four Equal Spans » Wide Flange Steel I Beam » W12 × 26
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 = 204 in4) for the W12 × 26 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
L = 100 ft
L = 125 ft
   
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 3.69 × 10-6 9.01
30.0 4.26 × 10-6 10.4
40.0 5.68 × 10-6 13.9
50.0 7.10 × 10-6 17.3
60.0 8.52 × 10-6 20.8
70.0 9.93 × 10-6 24.3
80.0 1.14 × 10-5 27.7
90.0 1.28 × 10-5 31.2
100 1.42 × 10-5 34.6
200 2.84 × 10-5 69.3
300 4.26 × 10-5 104
400 5.68 × 10-5 139
500 7.10 × 10-5 173
600 8.52 × 10-5 208
700 9.93 × 10-5 243
800 1.14 × 10-4 277
900 1.28 × 10-4 312
1000 1.42 × 10-4 346
2000 2.84 × 10-4 693
3000 4.26 × 10-4 1040
4000 5.68 × 10-4 1390
5000 7.10 × 10-4 1730
6000 8.52 × 10-4 2080
7000 9.93 × 10-4 2430
8000 0.00114 2770
9000 0.00128 3120
1.00 × 104 0.00142 3460
2.00 × 104 0.00284 6930
3.00 × 104 0.00426 1.04 × 104
4.00 × 104 0.00568 1.39 × 104
5.00 × 104 0.00710 1.73 × 104
6.00 × 104 0.00852 2.08 × 104
7.00 × 104 0.00993 2.43 × 104
8.00 × 104 0.0114 2.77 × 104
9.00 × 104 0.0128 3.12 × 104
1.00 × 105 0.0142 3.46 × 104
2.00 × 105 0.0284 6.93 × 104
3.00 × 105 0.0426 1.04 × 105
4.00 × 105 0.0568 1.39 × 105
5.00 × 105 0.0710 1.73 × 105
6.00 × 105 0.0852 2.08 × 105
7.00 × 105 0.0993 2.43 × 105
8.00 × 105 0.114 2.77 × 105
8.57 × 105 0.122 2.97 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 2.85 × 10-5 25.0
30.0 3.29 × 10-5 28.9
40.0 4.38 × 10-5 38.5
50.0 5.48 × 10-5 48.1
60.0 6.57 × 10-5 57.7
70.0 7.67 × 10-5 67.4
80.0 8.76 × 10-5 77.0
90.0 9.86 × 10-5 86.6
100 1.10 × 10-4 96.2
200 2.19 × 10-4 192
300 3.29 × 10-4 289
400 4.38 × 10-4 385
500 5.48 × 10-4 481
600 6.57 × 10-4 577
700 7.67 × 10-4 674
800 8.76 × 10-4 770
900 9.86 × 10-4 866
1000 0.00110 962
2000 0.00219 1920
3000 0.00329 2890
4000 0.00438 3850
5000 0.00548 4810
6000 0.00657 5770
7000 0.00767 6740
8000 0.00876 7700
9000 0.00986 8660
1.00 × 104 0.0110 9620
2.00 × 104 0.0219 1.92 × 104
3.00 × 104 0.0329 2.89 × 104
4.00 × 104 0.0438 3.85 × 104
5.00 × 104 0.0548 4.81 × 104
6.00 × 104 0.0657 5.77 × 104
7.00 × 104 0.0767 6.74 × 104
8.00 × 104 0.0876 7.70 × 104
9.00 × 104 0.0986 8.66 × 104
1.00 × 105 0.110 9.62 × 104
2.00 × 105 0.219 1.92 × 105
3.00 × 105 0.329 2.89 × 105
3.09 × 105 0.338 2.97 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 4.56 × 10-4 100
30.0 5.26 × 10-4 115
40.0 7.01 × 10-4 154
50.0 8.76 × 10-4 192
60.0 0.00105 231
70.0 0.00123 269
80.0 0.00140 308
90.0 0.00158 346
100 0.00175 385
200 0.00350 770
300 0.00526 1150
400 0.00701 1540
500 0.00876 1920
600 0.0105 2310
700 0.0123 2690
800 0.0140 3080
900 0.0158 3460
1000 0.0175 3850
2000 0.0350 7700
3000 0.0526 1.15 × 104
4000 0.0701 1.54 × 104
5000 0.0876 1.92 × 104
6000 0.105 2.31 × 104
7000 0.123 2.69 × 104
8000 0.140 3.08 × 104
9000 0.158 3.46 × 104
1.00 × 104 0.175 3.85 × 104
2.00 × 104 0.350 7.70 × 104
3.00 × 104 0.526 1.15 × 105
4.00 × 104 0.701 1.54 × 105
5.00 × 104 0.876 1.92 × 105
6.00 × 104 1.05 2.31 × 105
7.00 × 104 1.23 2.69 × 105
7.72 × 104 1.35 2.97 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 0.00231 225
30.0 0.00266 260
40.0 0.00355 346
50.0 0.00443 433
60.0 0.00532 520
70.0 0.00621 606
80.0 0.00710 693
90.0 0.00798 779
100 0.00887 866
200 0.0177 1730
300 0.0266 2600
400 0.0355 3460
500 0.0443 4330
600 0.0532 5200
700 0.0621 6060
800 0.0710 6930
900 0.0798 7790
1000 0.0887 8660
2000 0.177 1.73 × 104
3000 0.266 2.60 × 104
4000 0.355 3.46 × 104
5000 0.443 4.33 × 104
6000 0.532 5.20 × 104
7000 0.621 6.06 × 104
8000 0.710 6.93 × 104
9000 0.798 7.79 × 104
1.00 × 104 0.887 8.66 × 104
2.00 × 104 1.77 1.73 × 105
3.00 × 104 2.66 2.60 × 105
3.43 × 104 3.04 2.97 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 0.00729 400
30.0 0.00841 462
40.0 0.0112 616
50.0 0.0140 770
60.0 0.0168 924
70.0 0.0196 1080
80.0 0.0224 1230
90.0 0.0252 1390
100 0.0280 1540
200 0.0561 3080
300 0.0841 4620
400 0.112 6160
500 0.140 7700
600 0.168 9240
700 0.196 1.08 × 104
800 0.224 1.23 × 104
900 0.252 1.39 × 104
1000 0.280 1.54 × 104
2000 0.561 3.08 × 104
3000 0.841 4.62 × 104
4000 1.12 6.16 × 104
5000 1.40 7.70 × 104
6000 1.68 9.24 × 104
7000 1.96 1.08 × 105
8000 2.24 1.23 × 105
9000 2.52 1.39 × 105
1.00 × 104 2.80 1.54 × 105
1.93 × 104 5.41 2.97 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 0.0178 626
30.0 0.0205 722
40.0 0.0274 962
50.0 0.0342 1200
60.0 0.0411 1440
70.0 0.0479 1680
80.0 0.0548 1920
90.0 0.0616 2170
100 0.0684 2410
200 0.137 4810
300 0.205 7220
400 0.274 9620
500 0.342 1.20 × 104
600 0.411 1.44 × 104
700 0.479 1.68 × 104
800 0.548 1.92 × 104
900 0.616 2.17 × 104
1000 0.684 2.41 × 104
2000 1.37 4.81 × 104
3000 2.05 7.22 × 104
4000 2.74 9.62 × 104
5000 3.42 1.20 × 105
6000 4.11 1.44 × 105
7000 4.79 1.68 × 105
8000 5.48 1.92 × 105
9000 6.16 2.17 × 105
1.00 × 104 6.84 2.41 × 105
1.23 × 104 8.45 2.97 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 0.0369 901
30.0 0.0426 1040
40.0 0.0568 1390
50.0 0.0710 1730
60.0 0.0852 2080
70.0 0.0993 2430
80.0 0.114 2770
90.0 0.128 3120
100 0.142 3460
200 0.284 6930
300 0.426 1.04 × 104
400 0.568 1.39 × 104
500 0.710 1.73 × 104
600 0.852 2.08 × 104
700 0.993 2.43 × 104
800 1.14 2.77 × 104
900 1.28 3.12 × 104
1000 1.42 3.46 × 104
2000 2.84 6.93 × 104
3000 4.26 1.04 × 105
4000 5.68 1.39 × 105
5000 7.10 1.73 × 105
6000 8.52 2.08 × 105
7000 9.93 2.43 × 105
8000 11.4 2.77 × 105
8570 12.2 2.97 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 0.117 1600
30.0 0.135 1850
40.0 0.179 2460
50.0 0.224 3080
60.0 0.269 3700
70.0 0.314 4310
80.0 0.359 4930
90.0 0.404 5540
100 0.449 6160
200 0.897 1.23 × 104
300 1.35 1.85 × 104
400 1.79 2.46 × 104
500 2.24 3.08 × 104
600 2.69 3.70 × 104
700 3.14 4.31 × 104
800 3.59 4.93 × 104
900 4.04 5.54 × 104
1000 4.49 6.16 × 104
2000 8.97 1.23 × 105
2720 12.2 1.68 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 0.285 2500
30.0 0.329 2890
40.0 0.438 3850
50.0 0.548 4810
60.0 0.657 5770
70.0 0.767 6740
80.0 0.876 7700
90.0 0.986 8660
100 1.10 9620
200 2.19 1.92 × 104
300 3.29 2.89 × 104
400 4.38 3.85 × 104
500 5.48 4.81 × 104
600 6.57 5.77 × 104
700 7.67 6.74 × 104
800 8.76 7.70 × 104
900 9.86 8.66 × 104
1000 11.0 9.62 × 104
1120 12.2 1.07 × 105
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 0.590 3600
30.0 0.681 4160
40.0 0.908 5540
50.0 1.14 6930
60.0 1.36 8310
70.0 1.59 9700
80.0 1.82 1.11 × 104
90.0 2.04 1.25 × 104
100 2.27 1.39 × 104
200 4.54 2.77 × 104
300 6.81 4.16 × 104
400 9.08 5.54 × 104
500 11.4 6.93 × 104
538 12.2 7.46 × 104
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 1.09 4900
30.0 1.26 5660
40.0 1.68 7540
50.0 2.10 9430
60.0 2.52 1.13 × 104
70.0 2.94 1.32 × 104
80.0 3.37 1.51 × 104
90.0 3.79 1.70 × 104
100 4.21 1.89 × 104
200 8.41 3.77 × 104
290 12.2 5.48 × 104
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 1.87 6410
30.0 2.15 7390
40.0 2.87 9850
50.0 3.59 1.23 × 104
60.0 4.31 1.48 × 104
70.0 5.02 1.72 × 104
80.0 5.74 1.97 × 104
90.0 6.46 2.22 × 104
100 7.18 2.46 × 104
170 12.2 4.19 × 104
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 2.99 8110
30.0 3.45 9350
40.0 4.60 1.25 × 104
50.0 5.75 1.56 × 104
60.0 6.90 1.87 × 104
70.0 8.05 2.18 × 104
80.0 9.20 2.49 × 104
90.0 10.3 2.81 × 104
100 11.5 3.12 × 104
106 12.2 3.31 × 104
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 4.56 1.00 × 104
30.0 5.26 1.15 × 104
40.0 7.01 1.54 × 104
50.0 8.76 1.92 × 104
60.0 10.5 2.31 × 104
69.7 12.2 2.68 × 104
Steel I Beam: W12 × 26 (Wide Flange 12 inch tall × 26 lbf/ft)
L = 125 ft
P (lbf/ft) w_max (in) stress_max (psi)
26.0 11.1 1.56 × 104
28.6 12.2 1.72 × 104
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