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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four 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 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 = 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 1.90 × 10-5 22.8
20.0 2.20 × 10-5 26.4
30.0 3.30 × 10-5 39.6
40.0 4.40 × 10-5 52.8
50.0 5.50 × 10-5 66.0
60.0 6.60 × 10-5 79.2
70.0 7.71 × 10-5 92.4
80.0 8.81 × 10-5 106
90.0 9.91 × 10-5 119
100 1.10 × 10-4 132
200 2.20 × 10-4 264
300 3.30 × 10-4 396
400 4.40 × 10-4 528
500 5.50 × 10-4 660
600 6.60 × 10-4 792
700 7.71 × 10-4 924
800 8.81 × 10-4 1060
900 9.91 × 10-4 1190
1000 0.00110 1320
2000 0.00220 2640
3000 0.00330 3960
4000 0.00440 5280
5000 0.00550 6600
6000 0.00660 7920
7000 0.00771 9240
8000 0.00881 1.06 × 104
9000 0.00991 1.19 × 104
1.00 × 104 0.0110 1.32 × 104
2.00 × 104 0.0220 2.64 × 104
3.00 × 104 0.0330 3.96 × 104
4.00 × 104 0.0440 5.28 × 104
5.00 × 104 0.0550 6.60 × 104
6.00 × 104 0.0660 7.92 × 104
7.00 × 104 0.0771 9.24 × 104
8.00 × 104 0.0881 1.06 × 105
9.00 × 104 0.0991 1.19 × 105
1.00 × 105 0.110 1.32 × 105
2.00 × 105 0.220 2.64 × 105
2.25 × 105 0.248 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 1.47 × 10-4 63.2
20.0 1.70 × 10-4 73.3
30.0 2.55 × 10-4 110
40.0 3.40 × 10-4 147
50.0 4.25 × 10-4 183
60.0 5.10 × 10-4 220
70.0 5.95 × 10-4 257
80.0 6.80 × 10-4 293
90.0 7.64 × 10-4 330
100 8.49 × 10-4 367
200 0.00170 733
300 0.00255 1100
400 0.00340 1470
500 0.00425 1830
600 0.00510 2200
700 0.00595 2570
800 0.00680 2930
900 0.00764 3300
1000 0.00849 3670
2000 0.0170 7330
3000 0.0255 1.10 × 104
4000 0.0340 1.47 × 104
5000 0.0425 1.83 × 104
6000 0.0510 2.20 × 104
7000 0.0595 2.57 × 104
8000 0.0680 2.93 × 104
9000 0.0764 3.30 × 104
1.00 × 104 0.0849 3.67 × 104
2.00 × 104 0.170 7.33 × 104
3.00 × 104 0.255 1.10 × 105
4.00 × 104 0.340 1.47 × 105
5.00 × 104 0.425 1.83 × 105
6.00 × 104 0.510 2.20 × 105
7.00 × 104 0.595 2.57 × 105
8.00 × 104 0.680 2.93 × 105
8.10 × 104 0.688 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 0.00234 253
20.0 0.00272 293
30.0 0.00408 440
40.0 0.00544 586
50.0 0.00680 733
60.0 0.00815 880
70.0 0.00951 1030
80.0 0.0109 1170
90.0 0.0122 1320
100 0.0136 1470
200 0.0272 2930
300 0.0408 4400
400 0.0544 5860
500 0.0680 7330
600 0.0815 8800
700 0.0951 1.03 × 104
800 0.109 1.17 × 104
900 0.122 1.32 × 104
1000 0.136 1.47 × 104
2000 0.272 2.93 × 104
3000 0.408 4.40 × 104
4000 0.544 5.86 × 104
5000 0.680 7.33 × 104
6000 0.815 8.80 × 104
7000 0.951 1.03 × 105
8000 1.09 1.17 × 105
9000 1.22 1.32 × 105
1.00 × 104 1.36 1.47 × 105
2.00 × 104 2.72 2.93 × 105
2.03 × 104 2.75 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 0.0119 569
20.0 0.0138 660
30.0 0.0206 990
40.0 0.0275 1320
50.0 0.0344 1650
60.0 0.0413 1980
70.0 0.0482 2310
80.0 0.0550 2640
90.0 0.0619 2970
100 0.0688 3300
200 0.138 6600
300 0.206 9900
400 0.275 1.32 × 104
500 0.344 1.65 × 104
600 0.413 1.98 × 104
700 0.482 2.31 × 104
800 0.550 2.64 × 104
900 0.619 2.97 × 104
1000 0.688 3.30 × 104
2000 1.38 6.60 × 104
3000 2.06 9.90 × 104
4000 2.75 1.32 × 105
5000 3.44 1.65 × 105
6000 4.13 1.98 × 105
7000 4.82 2.31 × 105
8000 5.50 2.64 × 105
8720 6.00 2.88 × 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 0.0375 1010
20.0 0.0435 1170
30.0 0.0652 1760
40.0 0.0870 2350
50.0 0.109 2930
60.0 0.130 3520
70.0 0.152 4100
80.0 0.174 4690
90.0 0.196 5280
100 0.217 5860
200 0.435 1.17 × 104
300 0.652 1.76 × 104
400 0.870 2.35 × 104
500 1.09 2.93 × 104
600 1.30 3.52 × 104
700 1.52 4.10 × 104
800 1.74 4.69 × 104
900 1.96 5.28 × 104
1000 2.17 5.86 × 104
2000 4.35 1.17 × 105
2760 6.00 1.62 × 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 0.0916 1580
20.0 0.106 1830
30.0 0.159 2750
40.0 0.212 3670
50.0 0.265 4580
60.0 0.319 5500
70.0 0.372 6410
80.0 0.425 7330
90.0 0.478 8250
100 0.531 9160
200 1.06 1.83 × 104
300 1.59 2.75 × 104
400 2.12 3.67 × 104
500 2.65 4.58 × 104
600 3.19 5.50 × 104
700 3.72 6.41 × 104
800 4.25 7.33 × 104
900 4.78 8.25 × 104
1000 5.31 9.16 × 104
1130 6.00 1.04 × 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 0.190 2280
20.0 0.220 2640
30.0 0.330 3960
40.0 0.440 5280
50.0 0.550 6600
60.0 0.660 7920
70.0 0.771 9240
80.0 0.881 1.06 × 104
90.0 0.991 1.19 × 104
100 1.10 1.32 × 104
200 2.20 2.64 × 104
300 3.30 3.96 × 104
400 4.40 5.28 × 104
500 5.50 6.60 × 104
545 6.00 7.19 × 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 0.600 4050
20.0 0.696 4690
30.0 1.04 7040
40.0 1.39 9380
50.0 1.74 1.17 × 104
60.0 2.09 1.41 × 104
70.0 2.44 1.64 × 104
80.0 2.78 1.88 × 104
90.0 3.13 2.11 × 104
100 3.48 2.35 × 104
172 6.00 4.05 × 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 1.47 6320
20.0 1.70 7330
30.0 2.55 1.10 × 104
40.0 3.40 1.47 × 104
50.0 4.25 1.83 × 104
60.0 5.10 2.20 × 104
70.0 5.95 2.57 × 104
70.6 6.00 2.59 × 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 3.04 9100
20.0 3.52 1.06 × 104
30.0 5.28 1.58 × 104
34.1 6.00 1.80 × 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 5.63 1.24 × 104
18.4 6.00 1.32 × 104
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