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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four Equal Spans » Wide Flange Steel I Beam » W10 × 49
Wide Flange 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 = 272 in4) for the W10 × 49 Wide Flange 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: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 5.22 × 10-6 10.4
50.0 5.32 × 10-6 10.6
60.0 6.39 × 10-6 12.7
70.0 7.45 × 10-6 14.9
80.0 8.52 × 10-6 17.0
90.0 9.58 × 10-6 19.1
100 1.06 × 10-5 21.2
200 2.13 × 10-5 42.4
300 3.19 × 10-5 63.7
400 4.26 × 10-5 84.9
500 5.32 × 10-5 106
600 6.39 × 10-5 127
700 7.45 × 10-5 149
800 8.52 × 10-5 170
900 9.58 × 10-5 191
1000 1.06 × 10-4 212
2000 2.13 × 10-4 424
3000 3.19 × 10-4 637
4000 4.26 × 10-4 849
5000 5.32 × 10-4 1060
6000 6.39 × 10-4 1270
7000 7.45 × 10-4 1490
8000 8.52 × 10-4 1700
9000 9.58 × 10-4 1910
1.00 × 104 0.00106 2120
2.00 × 104 0.00213 4240
3.00 × 104 0.00319 6370
4.00 × 104 0.00426 8490
5.00 × 104 0.00532 1.06 × 104
6.00 × 104 0.00639 1.27 × 104
7.00 × 104 0.00745 1.49 × 104
8.00 × 104 0.00852 1.70 × 104
9.00 × 104 0.00958 1.91 × 104
1.00 × 105 0.0106 2.12 × 104
2.00 × 105 0.0213 4.24 × 104
3.00 × 105 0.0319 6.37 × 104
4.00 × 105 0.0426 8.49 × 104
5.00 × 105 0.0532 1.06 × 105
6.00 × 105 0.0639 1.27 × 105
7.00 × 105 0.0745 1.49 × 105
8.00 × 105 0.0852 1.70 × 105
9.00 × 105 0.0958 1.91 × 105
1.00 × 106 0.106 2.12 × 105
1.40 × 106 0.149 2.97 × 105
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 4.02 × 10-5 28.9
50.0 4.11 × 10-5 29.5
60.0 4.93 × 10-5 35.4
70.0 5.75 × 10-5 41.3
80.0 6.57 × 10-5 47.2
90.0 7.39 × 10-5 53.0
100 8.21 × 10-5 58.9
200 1.64 × 10-4 118
300 2.46 × 10-4 177
400 3.29 × 10-4 236
500 4.11 × 10-4 295
600 4.93 × 10-4 354
700 5.75 × 10-4 413
800 6.57 × 10-4 472
900 7.39 × 10-4 530
1000 8.21 × 10-4 589
2000 0.00164 1180
3000 0.00246 1770
4000 0.00329 2360
5000 0.00411 2950
6000 0.00493 3540
7000 0.00575 4130
8000 0.00657 4720
9000 0.00739 5300
1.00 × 104 0.00821 5890
2.00 × 104 0.0164 1.18 × 104
3.00 × 104 0.0246 1.77 × 104
4.00 × 104 0.0329 2.36 × 104
5.00 × 104 0.0411 2.95 × 104
6.00 × 104 0.0493 3.54 × 104
7.00 × 104 0.0575 4.13 × 104
8.00 × 104 0.0657 4.72 × 104
9.00 × 104 0.0739 5.30 × 104
1.00 × 105 0.0821 5.89 × 104
2.00 × 105 0.164 1.18 × 105
3.00 × 105 0.246 1.77 × 105
4.00 × 105 0.329 2.36 × 105
5.00 × 105 0.411 2.95 × 105
5.04 × 105 0.414 2.97 × 105
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 6.44 × 10-4 116
50.0 6.57 × 10-4 118
60.0 7.88 × 10-4 141
70.0 9.20 × 10-4 165
80.0 0.00105 189
90.0 0.00118 212
100 0.00131 236
200 0.00263 472
300 0.00394 707
400 0.00526 943
500 0.00657 1180
600 0.00788 1410
700 0.00920 1650
800 0.0105 1890
900 0.0118 2120
1000 0.0131 2360
2000 0.0263 4720
3000 0.0394 7070
4000 0.0526 9430
5000 0.0657 1.18 × 104
6000 0.0788 1.41 × 104
7000 0.0920 1.65 × 104
8000 0.105 1.89 × 104
9000 0.118 2.12 × 104
1.00 × 104 0.131 2.36 × 104
2.00 × 104 0.263 4.72 × 104
3.00 × 104 0.394 7.07 × 104
4.00 × 104 0.526 9.43 × 104
5.00 × 104 0.657 1.18 × 105
6.00 × 104 0.788 1.41 × 105
7.00 × 104 0.920 1.65 × 105
8.00 × 104 1.05 1.89 × 105
9.00 × 104 1.18 2.12 × 105
1.00 × 105 1.31 2.36 × 105
1.26 × 105 1.66 2.97 × 105
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 0.00326 260
50.0 0.00333 265
60.0 0.00399 318
70.0 0.00466 371
80.0 0.00532 424
90.0 0.00599 477
100 0.00665 530
200 0.0133 1060
300 0.0200 1590
400 0.0266 2120
500 0.0333 2650
600 0.0399 3180
700 0.0466 3710
800 0.0532 4240
900 0.0599 4770
1000 0.0665 5300
2000 0.133 1.06 × 104
3000 0.200 1.59 × 104
4000 0.266 2.12 × 104
5000 0.333 2.65 × 104
6000 0.399 3.18 × 104
7000 0.466 3.71 × 104
8000 0.532 4.24 × 104
9000 0.599 4.77 × 104
1.00 × 104 0.665 5.30 × 104
2.00 × 104 1.33 1.06 × 105
3.00 × 104 2.00 1.59 × 105
4.00 × 104 2.66 2.12 × 105
5.00 × 104 3.33 2.65 × 105
5.60 × 104 3.72 2.97 × 105
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 0.0103 462
50.0 0.0105 472
60.0 0.0126 566
70.0 0.0147 660
80.0 0.0168 754
90.0 0.0189 849
100 0.0210 943
200 0.0420 1890
300 0.0631 2830
400 0.0841 3770
500 0.105 4720
600 0.126 5660
700 0.147 6600
800 0.168 7540
900 0.189 8490
1000 0.210 9430
2000 0.420 1.89 × 104
3000 0.631 2.83 × 104
4000 0.841 3.77 × 104
5000 1.05 4.72 × 104
6000 1.26 5.66 × 104
7000 1.47 6.60 × 104
8000 1.68 7.54 × 104
9000 1.89 8.49 × 104
1.00 × 104 2.10 9.43 × 104
2.00 × 104 4.20 1.89 × 105
3.00 × 104 6.31 2.83 × 105
3.15 × 104 6.62 2.97 × 105
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 0.0252 722
50.0 0.0257 737
60.0 0.0308 884
70.0 0.0359 1030
80.0 0.0411 1180
90.0 0.0462 1330
100 0.0513 1470
200 0.103 2950
300 0.154 4420
400 0.205 5890
500 0.257 7370
600 0.308 8840
700 0.359 1.03 × 104
800 0.411 1.18 × 104
900 0.462 1.33 × 104
1000 0.513 1.47 × 104
2000 1.03 2.95 × 104
3000 1.54 4.42 × 104
4000 2.05 5.89 × 104
5000 2.57 7.37 × 104
6000 3.08 8.84 × 104
7000 3.59 1.03 × 105
8000 4.11 1.18 × 105
9000 4.62 1.33 × 105
1.00 × 104 5.13 1.47 × 105
1.94 × 104 9.98 2.87 × 105
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 0.0522 1040
50.0 0.0532 1060
60.0 0.0639 1270
70.0 0.0745 1490
80.0 0.0852 1700
90.0 0.0958 1910
100 0.106 2120
200 0.213 4240
300 0.319 6370
400 0.426 8490
500 0.532 1.06 × 104
600 0.639 1.27 × 104
700 0.745 1.49 × 104
800 0.852 1.70 × 104
900 0.958 1.91 × 104
1000 1.06 2.12 × 104
2000 2.13 4.24 × 104
3000 3.19 6.37 × 104
4000 4.26 8.49 × 104
5000 5.32 1.06 × 105
6000 6.39 1.27 × 105
7000 7.45 1.49 × 105
8000 8.52 1.70 × 105
9000 9.58 1.91 × 105
9380 9.98 1.99 × 105
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 0.165 1850
50.0 0.168 1890
60.0 0.202 2260
70.0 0.235 2640
80.0 0.269 3020
90.0 0.303 3400
100 0.336 3770
200 0.673 7540
300 1.01 1.13 × 104
400 1.35 1.51 × 104
500 1.68 1.89 × 104
600 2.02 2.26 × 104
700 2.35 2.64 × 104
800 2.69 3.02 × 104
900 3.03 3.40 × 104
1000 3.36 3.77 × 104
2000 6.73 7.54 × 104
2970 9.98 1.12 × 105
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 0.402 2890
50.0 0.411 2950
60.0 0.493 3540
70.0 0.575 4130
80.0 0.657 4720
90.0 0.739 5300
100 0.821 5890
200 1.64 1.18 × 104
300 2.46 1.77 × 104
400 3.29 2.36 × 104
500 4.11 2.95 × 104
600 4.93 3.54 × 104
700 5.75 4.13 × 104
800 6.57 4.72 × 104
900 7.39 5.30 × 104
1000 8.21 5.89 × 104
1220 9.98 7.16 × 104
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 0.834 4160
50.0 0.852 4240
60.0 1.02 5090
70.0 1.19 5940
80.0 1.36 6790
90.0 1.53 7640
100 1.70 8490
200 3.41 1.70 × 104
300 5.11 2.55 × 104
400 6.81 3.40 × 104
500 8.52 4.24 × 104
586 9.98 4.97 × 104
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 1.55 5660
50.0 1.58 5780
60.0 1.89 6930
70.0 2.21 8090
80.0 2.52 9240
90.0 2.84 1.04 × 104
100 3.16 1.16 × 104
200 6.31 2.31 × 104
300 9.47 3.47 × 104
316 9.98 3.65 × 104
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 2.64 7390
50.0 2.69 7540
60.0 3.23 9050
70.0 3.77 1.06 × 104
80.0 4.31 1.21 × 104
90.0 4.84 1.36 × 104
100 5.38 1.51 × 104
185 9.98 2.80 × 104
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 4.22 9360
50.0 4.31 9550
60.0 5.17 1.15 × 104
70.0 6.04 1.34 × 104
80.0 6.90 1.53 × 104
90.0 7.76 1.72 × 104
100 8.62 1.91 × 104
116 9.98 2.21 × 104
Steel I Beam: W10 × 49 (Wide Flange 10 inch tall × 49 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
49.0 6.44 1.16 × 104
50.0 6.57 1.18 × 104
60.0 7.88 1.41 × 104
70.0 9.20 1.65 × 104
75.9 9.98 1.79 × 104
Additional Information
Related Pages
Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Metal 3D Printing Design Guide

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

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.