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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Single Span » S Section Steel I Beam » S24 × 121
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 = 3160 in4) for the S24 × 121 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
L = 125 ft
L = 150 ft
   
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 2.29 × 10-6 6.33
200 3.79 × 10-6 10.5
300 5.68 × 10-6 15.7
400 7.57 × 10-6 20.9
500 9.47 × 10-6 26.2
600 1.14 × 10-5 31.4
700 1.33 × 10-5 36.6
800 1.51 × 10-5 41.9
900 1.70 × 10-5 47.1
1000 1.89 × 10-5 52.3
2000 3.79 × 10-5 105
3000 5.68 × 10-5 157
4000 7.57 × 10-5 209
5000 9.47 × 10-5 262
6000 1.14 × 10-4 314
7000 1.33 × 10-4 366
8000 1.51 × 10-4 419
9000 1.70 × 10-4 471
1.00 × 104 1.89 × 10-4 523
2.00 × 104 3.79 × 10-4 1050
3.00 × 104 5.68 × 10-4 1570
4.00 × 104 7.57 × 10-4 2090
5.00 × 104 9.47 × 10-4 2620
6.00 × 104 0.00114 3140
7.00 × 104 0.00133 3660
8.00 × 104 0.00151 4190
9.00 × 104 0.00170 4710
1.00 × 105 0.00189 5230
2.00 × 105 0.00379 1.05 × 104
3.00 × 105 0.00568 1.57 × 104
4.00 × 105 0.00757 2.09 × 104
5.00 × 105 0.00947 2.62 × 104
6.00 × 105 0.0114 3.14 × 104
7.00 × 105 0.0133 3.66 × 104
8.00 × 105 0.0151 4.19 × 104
9.00 × 105 0.0170 4.71 × 104
1.00 × 106 0.0189 5.23 × 104
2.00 × 106 0.0379 1.05 × 105
3.00 × 106 0.0568 1.57 × 105
4.00 × 106 0.0757 2.09 × 105
5.00 × 106 0.0947 2.62 × 105
5.68 × 106 0.107 2.97 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 1.77 × 10-5 17.6
200 2.92 × 10-5 29.1
300 4.38 × 10-5 43.6
400 5.84 × 10-5 58.1
500 7.31 × 10-5 72.7
600 8.77 × 10-5 87.2
700 1.02 × 10-4 102
800 1.17 × 10-4 116
900 1.31 × 10-4 131
1000 1.46 × 10-4 145
2000 2.92 × 10-4 291
3000 4.38 × 10-4 436
4000 5.84 × 10-4 581
5000 7.31 × 10-4 727
6000 8.77 × 10-4 872
7000 0.00102 1020
8000 0.00117 1160
9000 0.00131 1310
1.00 × 104 0.00146 1450
2.00 × 104 0.00292 2910
3.00 × 104 0.00438 4360
4.00 × 104 0.00584 5810
5.00 × 104 0.00731 7270
6.00 × 104 0.00877 8720
7.00 × 104 0.0102 1.02 × 104
8.00 × 104 0.0117 1.16 × 104
9.00 × 104 0.0131 1.31 × 104
1.00 × 105 0.0146 1.45 × 104
2.00 × 105 0.0292 2.91 × 104
3.00 × 105 0.0438 4.36 × 104
4.00 × 105 0.0584 5.81 × 104
5.00 × 105 0.0731 7.27 × 104
6.00 × 105 0.0877 8.72 × 104
7.00 × 105 0.102 1.02 × 105
8.00 × 105 0.117 1.16 × 105
9.00 × 105 0.131 1.31 × 105
1.00 × 106 0.146 1.45 × 105
2.00 × 106 0.292 2.91 × 105
2.04 × 106 0.299 2.97 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 2.83 × 10-4 70.4
200 4.68 × 10-4 116
300 7.01 × 10-4 174
400 9.35 × 10-4 233
500 0.00117 291
600 0.00140 349
700 0.00164 407
800 0.00187 465
900 0.00210 523
1000 0.00234 581
2000 0.00468 1160
3000 0.00701 1740
4000 0.00935 2330
5000 0.0117 2910
6000 0.0140 3490
7000 0.0164 4070
8000 0.0187 4650
9000 0.0210 5230
1.00 × 104 0.0234 5810
2.00 × 104 0.0468 1.16 × 104
3.00 × 104 0.0701 1.74 × 104
4.00 × 104 0.0935 2.33 × 104
5.00 × 104 0.117 2.91 × 104
6.00 × 104 0.140 3.49 × 104
7.00 × 104 0.164 4.07 × 104
8.00 × 104 0.187 4.65 × 104
9.00 × 104 0.210 5.23 × 104
1.00 × 105 0.234 5.81 × 104
2.00 × 105 0.468 1.16 × 105
3.00 × 105 0.701 1.74 × 105
4.00 × 105 0.935 2.33 × 105
5.00 × 105 1.17 2.91 × 105
5.11 × 105 1.19 2.97 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 0.00143 158
200 0.00237 262
300 0.00355 393
400 0.00473 523
500 0.00592 654
600 0.00710 785
700 0.00828 916
800 0.00947 1050
900 0.0107 1180
1000 0.0118 1310
2000 0.0237 2620
3000 0.0355 3930
4000 0.0473 5230
5000 0.0592 6540
6000 0.0710 7850
7000 0.0828 9160
8000 0.0947 1.05 × 104
9000 0.107 1.18 × 104
1.00 × 104 0.118 1.31 × 104
2.00 × 104 0.237 2.62 × 104
3.00 × 104 0.355 3.93 × 104
4.00 × 104 0.473 5.23 × 104
5.00 × 104 0.592 6.54 × 104
6.00 × 104 0.710 7.85 × 104
7.00 × 104 0.828 9.16 × 104
8.00 × 104 0.947 1.05 × 105
9.00 × 104 1.07 1.18 × 105
1.00 × 105 1.18 1.31 × 105
2.00 × 105 2.37 2.62 × 105
2.27 × 105 2.69 2.97 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 0.00453 281
200 0.00748 465
300 0.0112 698
400 0.0150 930
500 0.0187 1160
600 0.0224 1400
700 0.0262 1630
800 0.0299 1860
900 0.0337 2090
1000 0.0374 2330
2000 0.0748 4650
3000 0.112 6980
4000 0.150 9300
5000 0.187 1.16 × 104
6000 0.224 1.40 × 104
7000 0.262 1.63 × 104
8000 0.299 1.86 × 104
9000 0.337 2.09 × 104
1.00 × 104 0.374 2.33 × 104
2.00 × 104 0.748 4.65 × 104
3.00 × 104 1.12 6.98 × 104
4.00 × 104 1.50 9.30 × 104
5.00 × 104 1.87 1.16 × 105
6.00 × 104 2.24 1.40 × 105
7.00 × 104 2.62 1.63 × 105
8.00 × 104 2.99 1.86 × 105
9.00 × 104 3.37 2.09 × 105
1.00 × 105 3.74 2.33 × 105
1.28 × 105 4.78 2.97 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 0.0110 440
200 0.0183 727
300 0.0274 1090
400 0.0365 1450
500 0.0457 1820
600 0.0548 2180
700 0.0639 2540
800 0.0731 2910
900 0.0822 3270
1000 0.0913 3630
2000 0.183 7270
3000 0.274 1.09 × 104
4000 0.365 1.45 × 104
5000 0.457 1.82 × 104
6000 0.548 2.18 × 104
7000 0.639 2.54 × 104
8000 0.731 2.91 × 104
9000 0.822 3.27 × 104
1.00 × 104 0.913 3.63 × 104
2.00 × 104 1.83 7.27 × 104
3.00 × 104 2.74 1.09 × 105
4.00 × 104 3.65 1.45 × 105
5.00 × 104 4.57 1.82 × 105
6.00 × 104 5.48 2.18 × 105
7.00 × 104 6.39 2.54 × 105
8.00 × 104 7.31 2.91 × 105
8.17 × 104 7.46 2.97 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 0.0229 633
200 0.0379 1050
300 0.0568 1570
400 0.0757 2090
500 0.0947 2620
600 0.114 3140
700 0.133 3660
800 0.151 4190
900 0.170 4710
1000 0.189 5230
2000 0.379 1.05 × 104
3000 0.568 1.57 × 104
4000 0.757 2.09 × 104
5000 0.947 2.62 × 104
6000 1.14 3.14 × 104
7000 1.33 3.66 × 104
8000 1.51 4.19 × 104
9000 1.70 4.71 × 104
1.00 × 104 1.89 5.23 × 104
2.00 × 104 3.79 1.05 × 105
3.00 × 104 5.68 1.57 × 105
4.00 × 104 7.57 2.09 × 105
5.00 × 104 9.47 2.62 × 105
5.68 × 104 10.7 2.97 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 0.0724 1130
200 0.120 1860
300 0.180 2790
400 0.239 3720
500 0.299 4650
600 0.359 5580
700 0.419 6510
800 0.479 7440
900 0.539 8370
1000 0.598 9300
2000 1.20 1.86 × 104
3000 1.80 2.79 × 104
4000 2.39 3.72 × 104
5000 2.99 4.65 × 104
6000 3.59 5.58 × 104
7000 4.19 6.51 × 104
8000 4.79 7.44 × 104
9000 5.39 8.37 × 104
1.00 × 104 5.98 9.30 × 104
2.00 × 104 12.0 1.86 × 105
3.00 × 104 18.0 2.79 × 105
3.19 × 104 19.1 2.97 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 0.177 1760
200 0.292 2910
300 0.438 4360
400 0.584 5810
500 0.731 7270
600 0.877 8720
700 1.02 1.02 × 104
800 1.17 1.16 × 104
900 1.31 1.31 × 104
1000 1.46 1.45 × 104
2000 2.92 2.91 × 104
3000 4.38 4.36 × 104
4000 5.84 5.81 × 104
5000 7.31 7.27 × 104
6000 8.77 8.72 × 104
7000 10.2 1.02 × 105
8000 11.7 1.16 × 105
9000 13.1 1.31 × 105
1.00 × 104 14.6 1.45 × 105
1.68 × 104 24.5 2.44 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 0.367 2530
200 0.606 4190
300 0.909 6280
400 1.21 8370
500 1.51 1.05 × 104
600 1.82 1.26 × 104
700 2.12 1.47 × 104
800 2.42 1.67 × 104
900 2.73 1.88 × 104
1000 3.03 2.09 × 104
2000 6.06 4.19 × 104
3000 9.09 6.28 × 104
4000 12.1 8.37 × 104
5000 15.1 1.05 × 105
6000 18.2 1.26 × 105
7000 21.2 1.47 × 105
8000 24.2 1.67 × 105
8090 24.5 1.69 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 0.679 3450
200 1.12 5700
300 1.68 8550
400 2.25 1.14 × 104
500 2.81 1.42 × 104
600 3.37 1.71 × 104
700 3.93 1.99 × 104
800 4.49 2.28 × 104
900 5.05 2.56 × 104
1000 5.61 2.85 × 104
2000 11.2 5.70 × 104
3000 16.8 8.55 × 104
4000 22.5 1.14 × 105
4360 24.5 1.24 × 105
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 1.16 4500
200 1.92 7440
300 2.87 1.12 × 104
400 3.83 1.49 × 104
500 4.79 1.86 × 104
600 5.75 2.23 × 104
700 6.70 2.61 × 104
800 7.66 2.98 × 104
900 8.62 3.35 × 104
1000 9.58 3.72 × 104
2000 19.2 7.44 × 104
2560 24.5 9.52 × 104
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 1.86 5700
200 3.07 9420
300 4.60 1.41 × 104
400 6.14 1.88 × 104
500 7.67 2.36 × 104
600 9.20 2.83 × 104
700 10.7 3.30 × 104
800 12.3 3.77 × 104
900 13.8 4.24 × 104
1000 15.3 4.71 × 104
1600 24.5 7.52 × 104
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 2.83 7040
200 4.68 1.16 × 104
300 7.01 1.74 × 104
400 9.35 2.33 × 104
500 11.7 2.91 × 104
600 14.0 3.49 × 104
700 16.4 4.07 × 104
800 18.7 4.65 × 104
900 21.0 5.23 × 104
1000 23.4 5.81 × 104
1050 24.5 6.09 × 104
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 125 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 6.91 1.10 × 104
200 11.4 1.82 × 104
300 17.1 2.73 × 104
400 22.8 3.63 × 104
429 24.5 3.90 × 104
Steel I Beam: S24 × 121 (S Section 24 inch tall × 121 lbf/ft)
L = 150 ft
P (lbf/ft) w_max (in) stress_max (psi)
121 14.3 1.58 × 104
200 23.7 2.62 × 104
207 24.5 2.71 × 104
Additional Information
Related Pages
FREE Publications
Mechanical Engineers Outlook

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

STEM Career Outlook

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

Metal 3D Printing Design Guide

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

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more publications