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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three 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 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 = 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 5.63 × 10-6 9.71
50.0 5.74 × 10-6 9.91
60.0 6.89 × 10-6 11.9
70.0 8.04 × 10-6 13.9
80.0 9.19 × 10-6 15.9
90.0 1.03 × 10-5 17.8
100 1.15 × 10-5 19.8
200 2.30 × 10-5 39.6
300 3.45 × 10-5 59.4
400 4.60 × 10-5 79.3
500 5.74 × 10-5 99.1
600 6.89 × 10-5 119
700 8.04 × 10-5 139
800 9.19 × 10-5 159
900 1.03 × 10-4 178
1000 1.15 × 10-4 198
2000 2.30 × 10-4 396
3000 3.45 × 10-4 594
4000 4.60 × 10-4 793
5000 5.74 × 10-4 991
6000 6.89 × 10-4 1190
7000 8.04 × 10-4 1390
8000 9.19 × 10-4 1590
9000 0.00103 1780
1.00 × 104 0.00115 1980
2.00 × 104 0.00230 3960
3.00 × 104 0.00345 5940
4.00 × 104 0.00460 7930
5.00 × 104 0.00574 9910
6.00 × 104 0.00689 1.19 × 104
7.00 × 104 0.00804 1.39 × 104
8.00 × 104 0.00919 1.59 × 104
9.00 × 104 0.0103 1.78 × 104
1.00 × 105 0.0115 1.98 × 104
2.00 × 105 0.0230 3.96 × 104
3.00 × 105 0.0345 5.94 × 104
4.00 × 105 0.0460 7.93 × 104
5.00 × 105 0.0574 9.91 × 104
6.00 × 105 0.0689 1.19 × 105
7.00 × 105 0.0804 1.39 × 105
8.00 × 105 0.0919 1.59 × 105
9.00 × 105 0.103 1.78 × 105
1.00 × 106 0.115 1.98 × 105
1.50 × 106 0.172 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 4.34 × 10-5 27.0
50.0 4.43 × 10-5 27.5
60.0 5.32 × 10-5 33.0
70.0 6.21 × 10-5 38.5
80.0 7.09 × 10-5 44.0
90.0 7.98 × 10-5 49.5
100 8.86 × 10-5 55.0
200 1.77 × 10-4 110
300 2.66 × 10-4 165
400 3.55 × 10-4 220
500 4.43 × 10-4 275
600 5.32 × 10-4 330
700 6.21 × 10-4 385
800 7.09 × 10-4 440
900 7.98 × 10-4 495
1000 8.86 × 10-4 550
2000 0.00177 1100
3000 0.00266 1650
4000 0.00355 2200
5000 0.00443 2750
6000 0.00532 3300
7000 0.00621 3850
8000 0.00709 4400
9000 0.00798 4950
1.00 × 104 0.00886 5500
2.00 × 104 0.0177 1.10 × 104
3.00 × 104 0.0266 1.65 × 104
4.00 × 104 0.0355 2.20 × 104
5.00 × 104 0.0443 2.75 × 104
6.00 × 104 0.0532 3.30 × 104
7.00 × 104 0.0621 3.85 × 104
8.00 × 104 0.0709 4.40 × 104
9.00 × 104 0.0798 4.95 × 104
1.00 × 105 0.0886 5.50 × 104
2.00 × 105 0.177 1.10 × 105
3.00 × 105 0.266 1.65 × 105
4.00 × 105 0.355 2.20 × 105
5.00 × 105 0.443 2.75 × 105
5.40 × 105 0.478 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 6.95 × 10-4 108
50.0 7.09 × 10-4 110
60.0 8.51 × 10-4 132
70.0 9.93 × 10-4 154
80.0 0.00113 176
90.0 0.00128 198
100 0.00142 220
200 0.00284 440
300 0.00426 660
400 0.00567 881
500 0.00709 1100
600 0.00851 1320
700 0.00993 1540
800 0.0113 1760
900 0.0128 1980
1000 0.0142 2200
2000 0.0284 4400
3000 0.0426 6600
4000 0.0567 8810
5000 0.0709 1.10 × 104
6000 0.0851 1.32 × 104
7000 0.0993 1.54 × 104
8000 0.113 1.76 × 104
9000 0.128 1.98 × 104
1.00 × 104 0.142 2.20 × 104
2.00 × 104 0.284 4.40 × 104
3.00 × 104 0.426 6.60 × 104
4.00 × 104 0.567 8.81 × 104
5.00 × 104 0.709 1.10 × 105
6.00 × 104 0.851 1.32 × 105
7.00 × 104 0.993 1.54 × 105
8.00 × 104 1.13 1.76 × 105
9.00 × 104 1.28 1.98 × 105
1.00 × 105 1.42 2.20 × 105
1.35 × 105 1.91 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 0.00352 243
50.0 0.00359 248
60.0 0.00431 297
70.0 0.00503 347
80.0 0.00574 396
90.0 0.00646 446
100 0.00718 495
200 0.0144 991
300 0.0215 1490
400 0.0287 1980
500 0.0359 2480
600 0.0431 2970
700 0.0503 3470
800 0.0574 3960
900 0.0646 4460
1000 0.0718 4950
2000 0.144 9910
3000 0.215 1.49 × 104
4000 0.287 1.98 × 104
5000 0.359 2.48 × 104
6000 0.431 2.97 × 104
7000 0.503 3.47 × 104
8000 0.574 3.96 × 104
9000 0.646 4.46 × 104
1.00 × 104 0.718 4.95 × 104
2.00 × 104 1.44 9.91 × 104
3.00 × 104 2.15 1.49 × 105
4.00 × 104 2.87 1.98 × 105
5.00 × 104 3.59 2.48 × 105
6.00 × 104 4.31 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 0.0111 431
50.0 0.0113 440
60.0 0.0136 528
70.0 0.0159 616
80.0 0.0182 704
90.0 0.0204 793
100 0.0227 881
200 0.0454 1760
300 0.0681 2640
400 0.0908 3520
500 0.113 4400
600 0.136 5280
700 0.159 6160
800 0.182 7040
900 0.204 7930
1000 0.227 8810
2000 0.454 1.76 × 104
3000 0.681 2.64 × 104
4000 0.908 3.52 × 104
5000 1.13 4.40 × 104
6000 1.36 5.28 × 104
7000 1.59 6.16 × 104
8000 1.82 7.04 × 104
9000 2.04 7.93 × 104
1.00 × 104 2.27 8.81 × 104
2.00 × 104 4.54 1.76 × 105
3.00 × 104 6.81 2.64 × 105
3.37 × 104 7.65 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 0.0271 674
50.0 0.0277 688
60.0 0.0332 826
70.0 0.0388 963
80.0 0.0443 1100
90.0 0.0499 1240
100 0.0554 1380
200 0.111 2750
300 0.166 4130
400 0.222 5500
500 0.277 6880
600 0.332 8260
700 0.388 9630
800 0.443 1.10 × 104
900 0.499 1.24 × 104
1000 0.554 1.38 × 104
2000 1.11 2.75 × 104
3000 1.66 4.13 × 104
4000 2.22 5.50 × 104
5000 2.77 6.88 × 104
6000 3.32 8.26 × 104
7000 3.88 9.63 × 104
8000 4.43 1.10 × 105
9000 4.99 1.24 × 105
1.00 × 104 5.54 1.38 × 105
1.80 × 104 9.98 2.48 × 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 0.0563 971
50.0 0.0574 991
60.0 0.0689 1190
70.0 0.0804 1390
80.0 0.0919 1590
90.0 0.103 1780
100 0.115 1980
200 0.230 3960
300 0.345 5940
400 0.460 7930
500 0.574 9910
600 0.689 1.19 × 104
700 0.804 1.39 × 104
800 0.919 1.59 × 104
900 1.03 1.78 × 104
1000 1.15 1.98 × 104
2000 2.30 3.96 × 104
3000 3.45 5.94 × 104
4000 4.60 7.93 × 104
5000 5.74 9.91 × 104
6000 6.89 1.19 × 105
7000 8.04 1.39 × 105
8000 9.19 1.59 × 105
8690 9.98 1.72 × 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 0.178 1730
50.0 0.182 1760
60.0 0.218 2110
70.0 0.254 2470
80.0 0.290 2820
90.0 0.327 3170
100 0.363 3520
200 0.726 7040
300 1.09 1.06 × 104
400 1.45 1.41 × 104
500 1.82 1.76 × 104
600 2.18 2.11 × 104
700 2.54 2.47 × 104
800 2.90 2.82 × 104
900 3.27 3.17 × 104
1000 3.63 3.52 × 104
2000 7.26 7.04 × 104
2750 9.98 9.68 × 104
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 0.434 2700
50.0 0.443 2750
60.0 0.532 3300
70.0 0.621 3850
80.0 0.709 4400
90.0 0.798 4950
100 0.886 5500
200 1.77 1.10 × 104
300 2.66 1.65 × 104
400 3.55 2.20 × 104
500 4.43 2.75 × 104
600 5.32 3.30 × 104
700 6.21 3.85 × 104
800 7.09 4.40 × 104
900 7.98 4.95 × 104
1000 8.86 5.50 × 104
1130 9.98 6.20 × 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 0.901 3880
50.0 0.919 3960
60.0 1.10 4760
70.0 1.29 5550
80.0 1.47 6340
90.0 1.65 7130
100 1.84 7930
200 3.68 1.59 × 104
300 5.51 2.38 × 104
400 7.35 3.17 × 104
500 9.19 3.96 × 104
543 9.98 4.30 × 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 1.67 5290
50.0 1.70 5390
60.0 2.04 6470
70.0 2.38 7550
80.0 2.72 8630
90.0 3.06 9710
100 3.41 1.08 × 104
200 6.81 2.16 × 104
293 9.98 3.16 × 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 2.85 6900
50.0 2.90 7040
60.0 3.49 8450
70.0 4.07 9860
80.0 4.65 1.13 × 104
90.0 5.23 1.27 × 104
100 5.81 1.41 × 104
172 9.98 2.42 × 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 4.56 8740
50.0 4.65 8920
60.0 5.58 1.07 × 104
70.0 6.51 1.25 × 104
80.0 7.44 1.43 × 104
90.0 8.38 1.60 × 104
100 9.31 1.78 × 104
107 9.98 1.91 × 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 6.95 1.08 × 104
50.0 7.09 1.10 × 104
60.0 8.51 1.32 × 104
70.0 9.93 1.54 × 104
70.4 9.98 1.55 × 104
Additional Information
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Wages, employment opportunities, and growth projections for STEM jobs.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Mechanical Engineers Outlook

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

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