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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three 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 three equal spans, we compute the displacement at the middle of the first and the third spans, and the maximum normal stress stress_max occuring at the second and third supports 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
   
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 2.05 × 10-5 21.3
20.0 2.38 × 10-5 24.6
30.0 3.56 × 10-5 37.0
40.0 4.75 × 10-5 49.3
50.0 5.94 × 10-5 61.6
60.0 7.13 × 10-5 73.9
70.0 8.32 × 10-5 86.2
80.0 9.51 × 10-5 98.6
90.0 1.07 × 10-4 111
100 1.19 × 10-4 123
200 2.38 × 10-4 246
300 3.56 × 10-4 370
400 4.75 × 10-4 493
500 5.94 × 10-4 616
600 7.13 × 10-4 739
700 8.32 × 10-4 862
800 9.51 × 10-4 986
900 0.00107 1110
1000 0.00119 1230
2000 0.00238 2460
3000 0.00356 3700
4000 0.00475 4930
5000 0.00594 6160
6000 0.00713 7390
7000 0.00832 8620
8000 0.00951 9860
9000 0.0107 1.11 × 104
1.00 × 104 0.0119 1.23 × 104
2.00 × 104 0.0238 2.46 × 104
3.00 × 104 0.0356 3.70 × 104
4.00 × 104 0.0475 4.93 × 104
5.00 × 104 0.0594 6.16 × 104
6.00 × 104 0.0713 7.39 × 104
7.00 × 104 0.0832 8.62 × 104
8.00 × 104 0.0951 9.86 × 104
9.00 × 104 0.107 1.11 × 105
1.00 × 105 0.119 1.23 × 105
2.00 × 105 0.238 2.46 × 105
2.41 × 105 0.286 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 1.58 × 10-4 59.0
20.0 1.83 × 10-4 68.4
30.0 2.75 × 10-4 103
40.0 3.67 × 10-4 137
50.0 4.58 × 10-4 171
60.0 5.50 × 10-4 205
70.0 6.42 × 10-4 240
80.0 7.33 × 10-4 274
90.0 8.25 × 10-4 308
100 9.17 × 10-4 342
200 0.00183 684
300 0.00275 1030
400 0.00367 1370
500 0.00458 1710
600 0.00550 2050
700 0.00642 2400
800 0.00733 2740
900 0.00825 3080
1000 0.00917 3420
2000 0.0183 6840
3000 0.0275 1.03 × 104
4000 0.0367 1.37 × 104
5000 0.0458 1.71 × 104
6000 0.0550 2.05 × 104
7000 0.0642 2.40 × 104
8000 0.0733 2.74 × 104
9000 0.0825 3.08 × 104
1.00 × 104 0.0917 3.42 × 104
2.00 × 104 0.183 6.84 × 104
3.00 × 104 0.275 1.03 × 105
4.00 × 104 0.367 1.37 × 105
5.00 × 104 0.458 1.71 × 105
6.00 × 104 0.550 2.05 × 105
7.00 × 104 0.642 2.40 × 105
8.00 × 104 0.733 2.74 × 105
8.68 × 104 0.796 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 0.00253 236
20.0 0.00293 274
30.0 0.00440 411
40.0 0.00587 548
50.0 0.00733 684
60.0 0.00880 821
70.0 0.0103 958
80.0 0.0117 1100
90.0 0.0132 1230
100 0.0147 1370
200 0.0293 2740
300 0.0440 4110
400 0.0587 5480
500 0.0733 6840
600 0.0880 8210
700 0.103 9580
800 0.117 1.10 × 104
900 0.132 1.23 × 104
1000 0.147 1.37 × 104
2000 0.293 2.74 × 104
3000 0.440 4.11 × 104
4000 0.587 5.48 × 104
5000 0.733 6.84 × 104
6000 0.880 8.21 × 104
7000 1.03 9.58 × 104
8000 1.17 1.10 × 105
9000 1.32 1.23 × 105
1.00 × 104 1.47 1.37 × 105
2.00 × 104 2.93 2.74 × 105
2.17 × 104 3.18 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 0.0128 531
20.0 0.0149 616
30.0 0.0223 924
40.0 0.0297 1230
50.0 0.0371 1540
60.0 0.0446 1850
70.0 0.0520 2160
80.0 0.0594 2460
90.0 0.0668 2770
100 0.0743 3080
200 0.149 6160
300 0.223 9240
400 0.297 1.23 × 104
500 0.371 1.54 × 104
600 0.446 1.85 × 104
700 0.520 2.16 × 104
800 0.594 2.46 × 104
900 0.668 2.77 × 104
1000 0.743 3.08 × 104
2000 1.49 6.16 × 104
3000 2.23 9.24 × 104
4000 2.97 1.23 × 105
5000 3.71 1.54 × 105
6000 4.46 1.85 × 105
7000 5.20 2.16 × 105
8000 5.94 2.46 × 105
8080 6.00 2.49 × 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 0.0405 944
20.0 0.0469 1100
30.0 0.0704 1640
40.0 0.0939 2190
50.0 0.117 2740
60.0 0.141 3290
70.0 0.164 3830
80.0 0.188 4380
90.0 0.211 4930
100 0.235 5480
200 0.469 1.10 × 104
300 0.704 1.64 × 104
400 0.939 2.19 × 104
500 1.17 2.74 × 104
600 1.41 3.29 × 104
700 1.64 3.83 × 104
800 1.88 4.38 × 104
900 2.11 4.93 × 104
1000 2.35 5.48 × 104
2000 4.69 1.10 × 105
2560 6.00 1.40 × 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 0.0988 1480
20.0 0.115 1710
30.0 0.172 2570
40.0 0.229 3420
50.0 0.287 4280
60.0 0.344 5130
70.0 0.401 5990
80.0 0.458 6840
90.0 0.516 7700
100 0.573 8560
200 1.15 1.71 × 104
300 1.72 2.57 × 104
400 2.29 3.42 × 104
500 2.87 4.28 × 104
600 3.44 5.13 × 104
700 4.01 5.99 × 104
800 4.58 6.84 × 104
900 5.16 7.70 × 104
1000 5.73 8.56 × 104
1050 6.00 8.96 × 104
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 0.205 2130
20.0 0.238 2460
30.0 0.356 3700
40.0 0.475 4930
50.0 0.594 6160
60.0 0.713 7390
70.0 0.832 8620
80.0 0.951 9860
90.0 1.07 1.11 × 104
100 1.19 1.23 × 104
200 2.38 2.46 × 104
300 3.56 3.70 × 104
400 4.75 4.93 × 104
500 5.94 6.16 × 104
505 6.00 6.22 × 104
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 0.648 3780
20.0 0.751 4380
30.0 1.13 6570
40.0 1.50 8760
50.0 1.88 1.10 × 104
60.0 2.25 1.31 × 104
70.0 2.63 1.53 × 104
80.0 3.00 1.75 × 104
90.0 3.38 1.97 × 104
100 3.76 2.19 × 104
160 6.00 3.50 × 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 1.58 5900
20.0 1.83 6840
30.0 2.75 1.03 × 104
40.0 3.67 1.37 × 104
50.0 4.58 1.71 × 104
60.0 5.50 2.05 × 104
65.4 6.00 2.24 × 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 3.28 8500
20.0 3.80 9860
30.0 5.70 1.48 × 104
31.6 6.00 1.56 × 104
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Injection Molding Design Guide

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

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

more publications