CNC Machining Design Guide

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

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Mechanical Engineers Outlook

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

Essentials of Manufacturing

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

more free publications

Materials

Design

Processes

Units

Formulas

Math
Glossary » Beams » Simply Supported » Uniformly Distributed Load » Two Equal Spans » S Section Steel I Beam » S10 × 35
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 = 147 in4) for the S10 × 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: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 5.70 × 10-6 16.1
40.0 6.51 × 10-6 18.4
50.0 8.14 × 10-6 23.0
60.0 9.77 × 10-6 27.6
70.0 1.14 × 10-5 32.1
80.0 1.30 × 10-5 36.7
90.0 1.47 × 10-5 41.3
100 1.63 × 10-5 45.9
200 3.26 × 10-5 91.8
300 4.88 × 10-5 138
400 6.51 × 10-5 184
500 8.14 × 10-5 230
600 9.77 × 10-5 276
700 1.14 × 10-4 321
800 1.30 × 10-4 367
900 1.47 × 10-4 413
1000 1.63 × 10-4 459
2000 3.26 × 10-4 918
3000 4.88 × 10-4 1380
4000 6.51 × 10-4 1840
5000 8.14 × 10-4 2300
6000 9.77 × 10-4 2760
7000 0.00114 3210
8000 0.00130 3670
9000 0.00147 4130
1.00 × 104 0.00163 4590
2.00 × 104 0.00326 9180
3.00 × 104 0.00488 1.38 × 104
4.00 × 104 0.00651 1.84 × 104
5.00 × 104 0.00814 2.30 × 104
6.00 × 104 0.00977 2.76 × 104
7.00 × 104 0.0114 3.21 × 104
8.00 × 104 0.0130 3.67 × 104
9.00 × 104 0.0147 4.13 × 104
1.00 × 105 0.0163 4.59 × 104
2.00 × 105 0.0326 9.18 × 104
3.00 × 105 0.0488 1.38 × 105
4.00 × 105 0.0651 1.84 × 105
5.00 × 105 0.0814 2.30 × 105
6.00 × 105 0.0977 2.76 × 105
6.47 × 105 0.105 2.97 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 4.40 × 10-5 44.6
40.0 5.03 × 10-5 51.0
50.0 6.28 × 10-5 63.8
60.0 7.54 × 10-5 76.5
70.0 8.79 × 10-5 89.3
80.0 1.01 × 10-4 102
90.0 1.13 × 10-4 115
100 1.26 × 10-4 128
200 2.51 × 10-4 255
300 3.77 × 10-4 383
400 5.03 × 10-4 510
500 6.28 × 10-4 638
600 7.54 × 10-4 765
700 8.79 × 10-4 893
800 0.00101 1020
900 0.00113 1150
1000 0.00126 1280
2000 0.00251 2550
3000 0.00377 3830
4000 0.00503 5100
5000 0.00628 6380
6000 0.00754 7650
7000 0.00879 8930
8000 0.0101 1.02 × 104
9000 0.0113 1.15 × 104
1.00 × 104 0.0126 1.28 × 104
2.00 × 104 0.0251 2.55 × 104
3.00 × 104 0.0377 3.83 × 104
4.00 × 104 0.0503 5.10 × 104
5.00 × 104 0.0628 6.38 × 104
6.00 × 104 0.0754 7.65 × 104
7.00 × 104 0.0879 8.93 × 104
8.00 × 104 0.101 1.02 × 105
9.00 × 104 0.113 1.15 × 105
1.00 × 105 0.126 1.28 × 105
2.00 × 105 0.251 2.55 × 105
2.33 × 105 0.293 2.97 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 7.04 × 10-4 179
40.0 8.04 × 10-4 204
50.0 0.00101 255
60.0 0.00121 306
70.0 0.00141 357
80.0 0.00161 408
90.0 0.00181 459
100 0.00201 510
200 0.00402 1020
300 0.00603 1530
400 0.00804 2040
500 0.0101 2550
600 0.0121 3060
700 0.0141 3570
800 0.0161 4080
900 0.0181 4590
1000 0.0201 5100
2000 0.0402 1.02 × 104
3000 0.0603 1.53 × 104
4000 0.0804 2.04 × 104
5000 0.101 2.55 × 104
6000 0.121 3.06 × 104
7000 0.141 3.57 × 104
8000 0.161 4.08 × 104
9000 0.181 4.59 × 104
1.00 × 104 0.201 5.10 × 104
2.00 × 104 0.402 1.02 × 105
3.00 × 104 0.603 1.53 × 105
4.00 × 104 0.804 2.04 × 105
5.00 × 104 1.01 2.55 × 105
5.82 × 104 1.17 2.97 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.00356 402
40.0 0.00407 459
50.0 0.00509 574
60.0 0.00611 689
70.0 0.00712 804
80.0 0.00814 918
90.0 0.00916 1030
100 0.0102 1150
200 0.0204 2300
300 0.0305 3440
400 0.0407 4590
500 0.0509 5740
600 0.0611 6890
700 0.0712 8040
800 0.0814 9180
900 0.0916 1.03 × 104
1000 0.102 1.15 × 104
2000 0.204 2.30 × 104
3000 0.305 3.44 × 104
4000 0.407 4.59 × 104
5000 0.509 5.74 × 104
6000 0.611 6.89 × 104
7000 0.712 8.04 × 104
8000 0.814 9.18 × 104
9000 0.916 1.03 × 105
1.00 × 104 1.02 1.15 × 105
2.00 × 104 2.04 2.30 × 105
2.59 × 104 2.63 2.97 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0113 714
40.0 0.0129 816
50.0 0.0161 1020
60.0 0.0193 1220
70.0 0.0225 1430
80.0 0.0257 1630
90.0 0.0289 1840
100 0.0322 2040
200 0.0643 4080
300 0.0965 6120
400 0.129 8160
500 0.161 1.02 × 104
600 0.193 1.22 × 104
700 0.225 1.43 × 104
800 0.257 1.63 × 104
900 0.289 1.84 × 104
1000 0.322 2.04 × 104
2000 0.643 4.08 × 104
3000 0.965 6.12 × 104
4000 1.29 8.16 × 104
5000 1.61 1.02 × 105
6000 1.93 1.22 × 105
7000 2.25 1.43 × 105
8000 2.57 1.63 × 105
9000 2.89 1.84 × 105
1.00 × 104 3.22 2.04 × 105
1.46 × 104 4.68 2.97 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0275 1120
40.0 0.0314 1280
50.0 0.0393 1590
60.0 0.0471 1910
70.0 0.0550 2230
80.0 0.0628 2550
90.0 0.0707 2870
100 0.0785 3190
200 0.157 6380
300 0.236 9570
400 0.314 1.28 × 104
500 0.393 1.59 × 104
600 0.471 1.91 × 104
700 0.550 2.23 × 104
800 0.628 2.55 × 104
900 0.707 2.87 × 104
1000 0.785 3.19 × 104
2000 1.57 6.38 × 104
3000 2.36 9.57 × 104
4000 3.14 1.28 × 105
5000 3.93 1.59 × 105
6000 4.71 1.91 × 105
7000 5.50 2.23 × 105
8000 6.28 2.55 × 105
9000 7.07 2.87 × 105
9320 7.31 2.97 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.0570 1610
40.0 0.0651 1840
50.0 0.0814 2300
60.0 0.0977 2760
70.0 0.114 3210
80.0 0.130 3670
90.0 0.147 4130
100 0.163 4590
200 0.326 9180
300 0.488 1.38 × 104
400 0.651 1.84 × 104
500 0.814 2.30 × 104
600 0.977 2.76 × 104
700 1.14 3.21 × 104
800 1.30 3.67 × 104
900 1.47 4.13 × 104
1000 1.63 4.59 × 104
2000 3.26 9.18 × 104
3000 4.88 1.38 × 105
4000 6.51 1.84 × 105
5000 8.14 2.30 × 105
6000 9.77 2.76 × 105
6470 10.5 2.97 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.180 2860
40.0 0.206 3270
50.0 0.257 4080
60.0 0.309 4900
70.0 0.360 5710
80.0 0.412 6530
90.0 0.463 7350
100 0.515 8160
200 1.03 1.63 × 104
300 1.54 2.45 × 104
400 2.06 3.27 × 104
500 2.57 4.08 × 104
600 3.09 4.90 × 104
700 3.60 5.71 × 104
800 4.12 6.53 × 104
900 4.63 7.35 × 104
1000 5.15 8.16 × 104
1940 10.0 1.59 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.440 4460
40.0 0.503 5100
50.0 0.628 6380
60.0 0.754 7650
70.0 0.879 8930
80.0 1.01 1.02 × 104
90.0 1.13 1.15 × 104
100 1.26 1.28 × 104
200 2.51 2.55 × 104
300 3.77 3.83 × 104
400 5.03 5.10 × 104
500 6.28 6.38 × 104
600 7.54 7.65 × 104
700 8.79 8.93 × 104
796 10.0 1.02 × 105
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 0.912 6430
40.0 1.04 7350
50.0 1.30 9180
60.0 1.56 1.10 × 104
70.0 1.82 1.29 × 104
80.0 2.08 1.47 × 104
90.0 2.34 1.65 × 104
100 2.61 1.84 × 104
200 5.21 3.67 × 104
300 7.82 5.51 × 104
384 10.0 7.05 × 104
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 1.69 8750
40.0 1.93 1.00 × 104
50.0 2.41 1.25 × 104
60.0 2.90 1.50 × 104
70.0 3.38 1.75 × 104
80.0 3.86 2.00 × 104
90.0 4.34 2.25 × 104
100 4.83 2.50 × 104
200 9.65 5.00 × 104
207 10.0 5.18 × 104
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 2.88 1.14 × 104
40.0 3.29 1.31 × 104
50.0 4.12 1.63 × 104
60.0 4.94 1.96 × 104
70.0 5.76 2.29 × 104
80.0 6.59 2.61 × 104
90.0 7.41 2.94 × 104
100 8.23 3.27 × 104
121 10.0 3.97 × 104
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 4.62 1.45 × 104
40.0 5.28 1.65 × 104
50.0 6.59 2.07 × 104
60.0 7.91 2.48 × 104
70.0 9.23 2.89 × 104
75.8 10.0 3.13 × 104
Steel I Beam: S10 × 35 (S10 inch tall × 35 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
35.0 7.04 1.79 × 104
40.0 8.04 2.04 × 104
49.7 10.0 2.54 × 104
Additional Information
Related Pages
FREE Publications
CNC Machining Design Guide

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

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Mechanical Engineers Outlook

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

Essentials of Manufacturing

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

more publications