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S Section Steel I Beam: S12 × 35
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » S Section Steel I Beam » S12 × 35
S Section 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 = 229 in4) for the S12 × 35 S Section 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
   
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 9.15 × 10-6 12.4
40.0 1.05 × 10-5 14.1
50.0 1.31 × 10-5 17.7
60.0 1.57 × 10-5 21.2
70.0 1.83 × 10-5 24.8
80.0 2.09 × 10-5 28.3
90.0 2.35 × 10-5 31.8
100 2.61 × 10-5 35.4
200 5.23 × 10-5 70.7
300 7.84 × 10-5 106
400 1.05 × 10-4 141
500 1.31 × 10-4 177
600 1.57 × 10-4 212
700 1.83 × 10-4 248
800 2.09 × 10-4 283
900 2.35 × 10-4 318
1000 2.61 × 10-4 354
2000 5.23 × 10-4 707
3000 7.84 × 10-4 1060
4000 0.00105 1410
5000 0.00131 1770
6000 0.00157 2120
7000 0.00183 2480
8000 0.00209 2830
9000 0.00235 3180
1.00 × 104 0.00261 3540
2.00 × 104 0.00523 7070
3.00 × 104 0.00784 1.06 × 104
4.00 × 104 0.0105 1.41 × 104
5.00 × 104 0.0131 1.77 × 104
6.00 × 104 0.0157 2.12 × 104
7.00 × 104 0.0183 2.48 × 104
8.00 × 104 0.0209 2.83 × 104
9.00 × 104 0.0235 3.18 × 104
1.00 × 105 0.0261 3.54 × 104
2.00 × 105 0.0523 7.07 × 104
3.00 × 105 0.0784 1.06 × 105
4.00 × 105 0.105 1.41 × 105
5.00 × 105 0.131 1.77 × 105
6.00 × 105 0.157 2.12 × 105
7.00 × 105 0.183 2.48 × 105
8.00 × 105 0.209 2.83 × 105
8.40 × 105 0.219 2.97 × 105
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 7.06 × 10-5 34.4
40.0 8.06 × 10-5 39.3
50.0 1.01 × 10-4 49.1
60.0 1.21 × 10-4 59.0
70.0 1.41 × 10-4 68.8
80.0 1.61 × 10-4 78.6
90.0 1.81 × 10-4 88.4
100 2.02 × 10-4 98.3
200 4.03 × 10-4 197
300 6.05 × 10-4 295
400 8.06 × 10-4 393
500 0.00101 491
600 0.00121 590
700 0.00141 688
800 0.00161 786
900 0.00181 884
1000 0.00202 983
2000 0.00403 1970
3000 0.00605 2950
4000 0.00806 3930
5000 0.0101 4910
6000 0.0121 5900
7000 0.0141 6880
8000 0.0161 7860
9000 0.0181 8840
1.00 × 104 0.0202 9830
2.00 × 104 0.0403 1.97 × 104
3.00 × 104 0.0605 2.95 × 104
4.00 × 104 0.0806 3.93 × 104
5.00 × 104 0.101 4.91 × 104
6.00 × 104 0.121 5.90 × 104
7.00 × 104 0.141 6.88 × 104
8.00 × 104 0.161 7.86 × 104
9.00 × 104 0.181 8.84 × 104
1.00 × 105 0.202 9.83 × 104
2.00 × 105 0.403 1.97 × 105
3.00 × 105 0.605 2.95 × 105
3.02 × 105 0.610 2.97 × 105
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.00113 138
40.0 0.00129 157
50.0 0.00161 197
60.0 0.00194 236
70.0 0.00226 275
80.0 0.00258 314
90.0 0.00290 354
100 0.00323 393
200 0.00645 786
300 0.00968 1180
400 0.0129 1570
500 0.0161 1970
600 0.0194 2360
700 0.0226 2750
800 0.0258 3140
900 0.0290 3540
1000 0.0323 3930
2000 0.0645 7860
3000 0.0968 1.18 × 104
4000 0.129 1.57 × 104
5000 0.161 1.97 × 104
6000 0.194 2.36 × 104
7000 0.226 2.75 × 104
8000 0.258 3.14 × 104
9000 0.290 3.54 × 104
1.00 × 104 0.323 3.93 × 104
2.00 × 104 0.645 7.86 × 104
3.00 × 104 0.968 1.18 × 105
4.00 × 104 1.29 1.57 × 105
5.00 × 104 1.61 1.97 × 105
6.00 × 104 1.94 2.36 × 105
7.00 × 104 2.26 2.75 × 105
7.56 × 104 2.44 2.97 × 105
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.00572 309
40.0 0.00653 354
50.0 0.00817 442
60.0 0.00980 531
70.0 0.0114 619
80.0 0.0131 707
90.0 0.0147 796
100 0.0163 884
200 0.0327 1770
300 0.0490 2650
400 0.0653 3540
500 0.0817 4420
600 0.0980 5310
700 0.114 6190
800 0.131 7070
900 0.147 7960
1000 0.163 8840
2000 0.327 1.77 × 104
3000 0.490 2.65 × 104
4000 0.653 3.54 × 104
5000 0.817 4.42 × 104
6000 0.980 5.31 × 104
7000 1.14 6.19 × 104
8000 1.31 7.07 × 104
9000 1.47 7.96 × 104
1.00 × 104 1.63 8.84 × 104
2.00 × 104 3.27 1.77 × 105
3.00 × 104 4.90 2.65 × 105
3.36 × 104 5.49 2.97 × 105
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0181 550
40.0 0.0206 629
50.0 0.0258 786
60.0 0.0310 943
70.0 0.0361 1100
80.0 0.0413 1260
90.0 0.0465 1410
100 0.0516 1570
200 0.103 3140
300 0.155 4720
400 0.206 6290
500 0.258 7860
600 0.310 9430
700 0.361 1.10 × 104
800 0.413 1.26 × 104
900 0.465 1.41 × 104
1000 0.516 1.57 × 104
2000 1.03 3.14 × 104
3000 1.55 4.72 × 104
4000 2.06 6.29 × 104
5000 2.58 7.86 × 104
6000 3.10 9.43 × 104
7000 3.61 1.10 × 105
8000 4.13 1.26 × 105
9000 4.65 1.41 × 105
1.00 × 104 5.16 1.57 × 105
1.89 × 104 9.75 2.97 × 105
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0441 860
40.0 0.0504 983
50.0 0.0630 1230
60.0 0.0756 1470
70.0 0.0882 1720
80.0 0.101 1970
90.0 0.113 2210
100 0.126 2460
200 0.252 4910
300 0.378 7370
400 0.504 9830
500 0.630 1.23 × 104
600 0.756 1.47 × 104
700 0.882 1.72 × 104
800 1.01 1.97 × 104
900 1.13 2.21 × 104
1000 1.26 2.46 × 104
2000 2.52 4.91 × 104
3000 3.78 7.37 × 104
4000 5.04 9.83 × 104
5000 6.30 1.23 × 105
6000 7.56 1.47 × 105
7000 8.82 1.72 × 105
8000 10.1 1.97 × 105
9000 11.3 2.21 × 105
9520 12.0 2.34 × 105
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0915 1240
40.0 0.105 1410
50.0 0.131 1770
60.0 0.157 2120
70.0 0.183 2480
80.0 0.209 2830
90.0 0.235 3180
100 0.261 3540
200 0.523 7070
300 0.784 1.06 × 104
400 1.05 1.41 × 104
500 1.31 1.77 × 104
600 1.57 2.12 × 104
700 1.83 2.48 × 104
800 2.09 2.83 × 104
900 2.35 3.18 × 104
1000 2.61 3.54 × 104
2000 5.23 7.07 × 104
3000 7.84 1.06 × 105
4000 10.5 1.41 × 105
4590 12.0 1.62 × 105
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.289 2200
40.0 0.330 2520
50.0 0.413 3140
60.0 0.495 3770
70.0 0.578 4400
80.0 0.661 5030
90.0 0.743 5660
100 0.826 6290
200 1.65 1.26 × 104
300 2.48 1.89 × 104
400 3.30 2.52 × 104
500 4.13 3.14 × 104
600 4.95 3.77 × 104
700 5.78 4.40 × 104
800 6.61 5.03 × 104
900 7.43 5.66 × 104
1000 8.26 6.29 × 104
1450 12.0 9.14 × 104
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.706 3440
40.0 0.806 3930
50.0 1.01 4910
60.0 1.21 5900
70.0 1.41 6880
80.0 1.61 7860
90.0 1.81 8840
100 2.02 9830
200 4.03 1.97 × 104
300 6.05 2.95 × 104
400 8.06 3.93 × 104
500 10.1 4.91 × 104
595 12.0 5.85 × 104
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 1.46 4950
40.0 1.67 5660
50.0 2.09 7070
60.0 2.51 8490
70.0 2.93 9900
80.0 3.34 1.13 × 104
90.0 3.76 1.27 × 104
100 4.18 1.41 × 104
200 8.36 2.83 × 104
287 12.0 4.06 × 104
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 2.71 6740
40.0 3.10 7700
50.0 3.87 9630
60.0 4.65 1.16 × 104
70.0 5.42 1.35 × 104
80.0 6.20 1.54 × 104
90.0 6.97 1.73 × 104
100 7.75 1.93 × 104
155 12.0 2.98 × 104
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 4.62 8800
40.0 5.29 1.01 × 104
50.0 6.61 1.26 × 104
60.0 7.93 1.51 × 104
70.0 9.25 1.76 × 104
80.0 10.6 2.01 × 104
90.0 11.9 2.26 × 104
90.8 12.0 2.28 × 104
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 7.41 1.11 × 104
40.0 8.47 1.27 × 104
50.0 10.6 1.59 × 104
56.7 12.0 1.80 × 104
Steel I Beam: S12 × 35 (S Section 12 inch tall × 35 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 11.3 1.38 × 104
37.2 12.0 1.46 × 104
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