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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » S Section Steel I Beam » S6 × 17.25
S Section Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in two equal spans, we compute the displacement at the middle of each span w_mid and the maximum normal stress stress_max occuring at the center support of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 26.3 in4) for the S6 × 17.25 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
   
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 1.57 × 10-5 26.6
20.0 1.82 × 10-5 30.8
30.0 2.73 × 10-5 46.2
40.0 3.64 × 10-5 61.6
50.0 4.55 × 10-5 77.0
60.0 5.46 × 10-5 92.4
70.0 6.37 × 10-5 108
80.0 7.28 × 10-5 123
90.0 8.19 × 10-5 139
100 9.10 × 10-5 154
200 1.82 × 10-4 308
300 2.73 × 10-4 462
400 3.64 × 10-4 616
500 4.55 × 10-4 770
600 5.46 × 10-4 924
700 6.37 × 10-4 1080
800 7.28 × 10-4 1230
900 8.19 × 10-4 1390
1000 9.10 × 10-4 1540
2000 0.00182 3080
3000 0.00273 4620
4000 0.00364 6160
5000 0.00455 7700
6000 0.00546 9240
7000 0.00637 1.08 × 104
8000 0.00728 1.23 × 104
9000 0.00819 1.39 × 104
1.00 × 104 0.00910 1.54 × 104
2.00 × 104 0.0182 3.08 × 104
3.00 × 104 0.0273 4.62 × 104
4.00 × 104 0.0364 6.16 × 104
5.00 × 104 0.0455 7.70 × 104
6.00 × 104 0.0546 9.24 × 104
7.00 × 104 0.0637 1.08 × 105
8.00 × 104 0.0728 1.23 × 105
9.00 × 104 0.0819 1.39 × 105
1.00 × 105 0.0910 1.54 × 105
1.93 × 105 0.176 2.97 × 105
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 1.21 × 10-4 73.8
20.0 1.40 × 10-4 85.6
30.0 2.11 × 10-4 128
40.0 2.81 × 10-4 171
50.0 3.51 × 10-4 214
60.0 4.21 × 10-4 257
70.0 4.92 × 10-4 299
80.0 5.62 × 10-4 342
90.0 6.32 × 10-4 385
100 7.02 × 10-4 428
200 0.00140 856
300 0.00211 1280
400 0.00281 1710
500 0.00351 2140
600 0.00421 2570
700 0.00492 2990
800 0.00562 3420
900 0.00632 3850
1000 0.00702 4280
2000 0.0140 8560
3000 0.0211 1.28 × 104
4000 0.0281 1.71 × 104
5000 0.0351 2.14 × 104
6000 0.0421 2.57 × 104
7000 0.0492 2.99 × 104
8000 0.0562 3.42 × 104
9000 0.0632 3.85 × 104
1.00 × 104 0.0702 4.28 × 104
2.00 × 104 0.140 8.56 × 104
3.00 × 104 0.211 1.28 × 105
4.00 × 104 0.281 1.71 × 105
5.00 × 104 0.351 2.14 × 105
6.00 × 104 0.421 2.57 × 105
6.94 × 104 0.488 2.97 × 105
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 0.00194 295
20.0 0.00225 342
30.0 0.00337 513
40.0 0.00449 684
50.0 0.00562 856
60.0 0.00674 1030
70.0 0.00786 1200
80.0 0.00899 1370
90.0 0.0101 1540
100 0.0112 1710
200 0.0225 3420
300 0.0337 5130
400 0.0449 6840
500 0.0562 8560
600 0.0674 1.03 × 104
700 0.0786 1.20 × 104
800 0.0899 1.37 × 104
900 0.101 1.54 × 104
1000 0.112 1.71 × 104
2000 0.225 3.42 × 104
3000 0.337 5.13 × 104
4000 0.449 6.84 × 104
5000 0.562 8.56 × 104
6000 0.674 1.03 × 105
7000 0.786 1.20 × 105
8000 0.899 1.37 × 105
9000 1.01 1.54 × 105
1.00 × 104 1.12 1.71 × 105
1.74 × 104 1.95 2.97 × 105
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 0.00981 664
20.0 0.0114 770
30.0 0.0171 1150
40.0 0.0228 1540
50.0 0.0284 1920
60.0 0.0341 2310
70.0 0.0398 2690
80.0 0.0455 3080
90.0 0.0512 3460
100 0.0569 3850
200 0.114 7700
300 0.171 1.15 × 104
400 0.228 1.54 × 104
500 0.284 1.92 × 104
600 0.341 2.31 × 104
700 0.398 2.69 × 104
800 0.455 3.08 × 104
900 0.512 3.46 × 104
1000 0.569 3.85 × 104
2000 1.14 7.70 × 104
3000 1.71 1.15 × 105
4000 2.28 1.54 × 105
5000 2.84 1.92 × 105
6000 3.41 2.31 × 105
7000 3.98 2.69 × 105
7720 4.39 2.97 × 105
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 0.0310 1180
20.0 0.0360 1370
30.0 0.0539 2050
40.0 0.0719 2740
50.0 0.0899 3420
60.0 0.108 4110
70.0 0.126 4790
80.0 0.144 5480
90.0 0.162 6160
100 0.180 6840
200 0.360 1.37 × 104
300 0.539 2.05 × 104
400 0.719 2.74 × 104
500 0.899 3.42 × 104
600 1.08 4.11 × 104
700 1.26 4.79 × 104
800 1.44 5.48 × 104
900 1.62 6.16 × 104
1000 1.80 6.84 × 104
2000 3.60 1.37 × 105
3000 5.39 2.05 × 105
3340 6.00 2.28 × 105
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 0.0757 1840
20.0 0.0878 2140
30.0 0.132 3210
40.0 0.176 4280
50.0 0.219 5350
60.0 0.263 6420
70.0 0.307 7490
80.0 0.351 8560
90.0 0.395 9620
100 0.439 1.07 × 104
200 0.878 2.14 × 104
300 1.32 3.21 × 104
400 1.76 4.28 × 104
500 2.19 5.35 × 104
600 2.63 6.42 × 104
700 3.07 7.49 × 104
800 3.51 8.56 × 104
900 3.95 9.62 × 104
1000 4.39 1.07 × 105
1370 6.00 1.46 × 105
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 0.157 2660
20.0 0.182 3080
30.0 0.273 4620
40.0 0.364 6160
50.0 0.455 7700
60.0 0.546 9240
70.0 0.637 1.08 × 104
80.0 0.728 1.23 × 104
90.0 0.819 1.39 × 104
100 0.910 1.54 × 104
200 1.82 3.08 × 104
300 2.73 4.62 × 104
400 3.64 6.16 × 104
500 4.55 7.70 × 104
600 5.46 9.24 × 104
659 6.00 1.02 × 105
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 0.496 4720
20.0 0.575 5480
30.0 0.863 8210
40.0 1.15 1.10 × 104
50.0 1.44 1.37 × 104
60.0 1.73 1.64 × 104
70.0 2.01 1.92 × 104
80.0 2.30 2.19 × 104
90.0 2.59 2.46 × 104
100 2.88 2.74 × 104
200 5.75 5.48 × 104
209 6.00 5.71 × 104
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 1.21 7380
20.0 1.40 8560
30.0 2.11 1.28 × 104
40.0 2.81 1.71 × 104
50.0 3.51 2.14 × 104
60.0 4.21 2.57 × 104
70.0 4.92 2.99 × 104
80.0 5.62 3.42 × 104
85.4 6.00 3.65 × 104
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 2.51 1.06 × 104
20.0 2.91 1.23 × 104
30.0 4.37 1.85 × 104
40.0 5.82 2.46 × 104
41.2 6.00 2.54 × 104
Steel I Beam: S6 × 17.25 (S6 inch tall × 17.25 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
17.3 4.65 1.45 × 104
20.0 5.40 1.68 × 104
22.2 6.00 1.86 × 104
Additional Information
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Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

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A white paper to assist in the evaluation of 3D scanning hardware solutions.

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Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

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