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Wide Flange Steel I Beam: W14 × 30
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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Four Equal Spans » Wide Flange Steel I Beam » W14 × 30
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 = 291 in4) for the W14 × 30 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
L = 125 ft
   
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 3.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 2.98 × 10-6 8.25
40.0 3.98 × 10-6 11.0
50.0 4.97 × 10-6 13.8
60.0 5.97 × 10-6 16.5
70.0 6.96 × 10-6 19.3
80.0 7.96 × 10-6 22.0
90.0 8.95 × 10-6 24.8
100 9.95 × 10-6 27.5
200 1.99 × 10-5 55.0
300 2.98 × 10-5 82.5
400 3.98 × 10-5 110
500 4.97 × 10-5 138
600 5.97 × 10-5 165
700 6.96 × 10-5 193
800 7.96 × 10-5 220
900 8.95 × 10-5 248
1000 9.95 × 10-5 275
2000 1.99 × 10-4 550
3000 2.98 × 10-4 825
4000 3.98 × 10-4 1100
5000 4.97 × 10-4 1380
6000 5.97 × 10-4 1650
7000 6.96 × 10-4 1930
8000 7.96 × 10-4 2200
9000 8.95 × 10-4 2480
1.00 × 104 9.95 × 10-4 2750
2.00 × 104 0.00199 5500
3.00 × 104 0.00298 8250
4.00 × 104 0.00398 1.10 × 104
5.00 × 104 0.00497 1.38 × 104
6.00 × 104 0.00597 1.65 × 104
7.00 × 104 0.00696 1.93 × 104
8.00 × 104 0.00796 2.20 × 104
9.00 × 104 0.00895 2.48 × 104
1.00 × 105 0.00995 2.75 × 104
2.00 × 105 0.0199 5.50 × 104
3.00 × 105 0.0298 8.25 × 104
4.00 × 105 0.0398 1.10 × 105
5.00 × 105 0.0497 1.38 × 105
6.00 × 105 0.0597 1.65 × 105
7.00 × 105 0.0696 1.93 × 105
8.00 × 105 0.0796 2.20 × 105
9.00 × 105 0.0895 2.48 × 105
1.00 × 106 0.0995 2.75 × 105
1.08 × 106 0.107 2.97 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 5.00 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 2.30 × 10-5 22.9
40.0 3.07 × 10-5 30.6
50.0 3.84 × 10-5 38.2
60.0 4.61 × 10-5 45.8
70.0 5.37 × 10-5 53.5
80.0 6.14 × 10-5 61.1
90.0 6.91 × 10-5 68.8
100 7.68 × 10-5 76.4
200 1.54 × 10-4 153
300 2.30 × 10-4 229
400 3.07 × 10-4 306
500 3.84 × 10-4 382
600 4.61 × 10-4 458
700 5.37 × 10-4 535
800 6.14 × 10-4 611
900 6.91 × 10-4 688
1000 7.68 × 10-4 764
2000 0.00154 1530
3000 0.00230 2290
4000 0.00307 3060
5000 0.00384 3820
6000 0.00461 4580
7000 0.00537 5350
8000 0.00614 6110
9000 0.00691 6880
1.00 × 104 0.00768 7640
2.00 × 104 0.0154 1.53 × 104
3.00 × 104 0.0230 2.29 × 104
4.00 × 104 0.0307 3.06 × 104
5.00 × 104 0.0384 3.82 × 104
6.00 × 104 0.0461 4.58 × 104
7.00 × 104 0.0537 5.35 × 104
8.00 × 104 0.0614 6.11 × 104
9.00 × 104 0.0691 6.88 × 104
1.00 × 105 0.0768 7.64 × 104
2.00 × 105 0.154 1.53 × 105
3.00 × 105 0.230 2.29 × 105
3.89 × 105 0.298 2.97 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 10.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 3.68 × 10-4 91.7
40.0 4.91 × 10-4 122
50.0 6.14 × 10-4 153
60.0 7.37 × 10-4 183
70.0 8.60 × 10-4 214
80.0 9.83 × 10-4 244
90.0 0.00111 275
100 0.00123 306
200 0.00246 611
300 0.00368 917
400 0.00491 1220
500 0.00614 1530
600 0.00737 1830
700 0.00860 2140
800 0.00983 2440
900 0.0111 2750
1000 0.0123 3060
2000 0.0246 6110
3000 0.0368 9170
4000 0.0491 1.22 × 104
5000 0.0614 1.53 × 104
6000 0.0737 1.83 × 104
7000 0.0860 2.14 × 104
8000 0.0983 2.44 × 104
9000 0.111 2.75 × 104
1.00 × 104 0.123 3.06 × 104
2.00 × 104 0.246 6.11 × 104
3.00 × 104 0.368 9.17 × 104
4.00 × 104 0.491 1.22 × 105
5.00 × 104 0.614 1.53 × 105
6.00 × 104 0.737 1.83 × 105
7.00 × 104 0.860 2.14 × 105
8.00 × 104 0.983 2.44 × 105
9.00 × 104 1.11 2.75 × 105
9.72 × 104 1.19 2.97 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 15.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 0.00187 206
40.0 0.00249 275
50.0 0.00311 344
60.0 0.00373 413
70.0 0.00435 481
80.0 0.00497 550
90.0 0.00560 619
100 0.00622 688
200 0.0124 1380
300 0.0187 2060
400 0.0249 2750
500 0.0311 3440
600 0.0373 4130
700 0.0435 4810
800 0.0497 5500
900 0.0560 6190
1000 0.0622 6880
2000 0.124 1.38 × 104
3000 0.187 2.06 × 104
4000 0.249 2.75 × 104
5000 0.311 3.44 × 104
6000 0.373 4.13 × 104
7000 0.435 4.81 × 104
8000 0.497 5.50 × 104
9000 0.560 6.19 × 104
1.00 × 104 0.622 6.88 × 104
2.00 × 104 1.24 1.38 × 105
3.00 × 104 1.87 2.06 × 105
4.00 × 104 2.49 2.75 × 105
4.32 × 104 2.69 2.97 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 20.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 0.00590 367
40.0 0.00786 489
50.0 0.00983 611
60.0 0.0118 733
70.0 0.0138 856
80.0 0.0157 978
90.0 0.0177 1100
100 0.0197 1220
200 0.0393 2440
300 0.0590 3670
400 0.0786 4890
500 0.0983 6110
600 0.118 7330
700 0.138 8560
800 0.157 9780
900 0.177 1.10 × 104
1000 0.197 1.22 × 104
2000 0.393 2.44 × 104
3000 0.590 3.67 × 104
4000 0.786 4.89 × 104
5000 0.983 6.11 × 104
6000 1.18 7.33 × 104
7000 1.38 8.56 × 104
8000 1.57 9.78 × 104
9000 1.77 1.10 × 105
1.00 × 104 1.97 1.22 × 105
2.00 × 104 3.93 2.44 × 105
2.43 × 104 4.78 2.97 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 25.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 0.0144 573
40.0 0.0192 764
50.0 0.0240 955
60.0 0.0288 1150
70.0 0.0336 1340
80.0 0.0384 1530
90.0 0.0432 1720
100 0.0480 1910
200 0.0960 3820
300 0.144 5730
400 0.192 7640
500 0.240 9550
600 0.288 1.15 × 104
700 0.336 1.34 × 104
800 0.384 1.53 × 104
900 0.432 1.72 × 104
1000 0.480 1.91 × 104
2000 0.960 3.82 × 104
3000 1.44 5.73 × 104
4000 1.92 7.64 × 104
5000 2.40 9.55 × 104
6000 2.88 1.15 × 105
7000 3.36 1.34 × 105
8000 3.84 1.53 × 105
9000 4.32 1.72 × 105
1.00 × 104 4.80 1.91 × 105
1.56 × 104 7.46 2.97 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 30.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 0.0298 825
40.0 0.0398 1100
50.0 0.0497 1380
60.0 0.0597 1650
70.0 0.0696 1930
80.0 0.0796 2200
90.0 0.0895 2480
100 0.0995 2750
200 0.199 5500
300 0.298 8250
400 0.398 1.10 × 104
500 0.497 1.38 × 104
600 0.597 1.65 × 104
700 0.696 1.93 × 104
800 0.796 2.20 × 104
900 0.895 2.48 × 104
1000 0.995 2.75 × 104
2000 1.99 5.50 × 104
3000 2.98 8.25 × 104
4000 3.98 1.10 × 105
5000 4.97 1.38 × 105
6000 5.97 1.65 × 105
7000 6.96 1.93 × 105
8000 7.96 2.20 × 105
9000 8.95 2.48 × 105
1.00 × 104 9.95 2.75 × 105
1.08 × 104 10.7 2.97 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 40.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 0.0943 1470
40.0 0.126 1960
50.0 0.157 2440
60.0 0.189 2930
70.0 0.220 3420
80.0 0.252 3910
90.0 0.283 4400
100 0.314 4890
200 0.629 9780
300 0.943 1.47 × 104
400 1.26 1.96 × 104
500 1.57 2.44 × 104
600 1.89 2.93 × 104
700 2.20 3.42 × 104
800 2.52 3.91 × 104
900 2.83 4.40 × 104
1000 3.14 4.89 × 104
2000 6.29 9.78 × 104
3000 9.43 1.47 × 105
4000 12.6 1.96 × 105
4400 13.8 2.15 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 50.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 0.230 2290
40.0 0.307 3060
50.0 0.384 3820
60.0 0.461 4580
70.0 0.537 5350
80.0 0.614 6110
90.0 0.691 6880
100 0.768 7640
200 1.54 1.53 × 104
300 2.30 2.29 × 104
400 3.07 3.06 × 104
500 3.84 3.82 × 104
600 4.61 4.58 × 104
700 5.37 5.35 × 104
800 6.14 6.11 × 104
900 6.91 6.88 × 104
1000 7.68 7.64 × 104
1800 13.8 1.38 × 105
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 60.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 0.478 3300
40.0 0.637 4400
50.0 0.796 5500
60.0 0.955 6600
70.0 1.11 7700
80.0 1.27 8800
90.0 1.43 9900
100 1.59 1.10 × 104
200 3.18 2.20 × 104
300 4.78 3.30 × 104
400 6.37 4.40 × 104
500 7.96 5.50 × 104
600 9.55 6.60 × 104
700 11.1 7.70 × 104
800 12.7 8.80 × 104
869 13.8 9.57 × 104
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 70.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 0.885 4490
40.0 1.18 5990
50.0 1.47 7490
60.0 1.77 8990
70.0 2.06 1.05 × 104
80.0 2.36 1.20 × 104
90.0 2.65 1.35 × 104
100 2.95 1.50 × 104
200 5.90 3.00 × 104
300 8.85 4.49 × 104
400 11.8 5.99 × 104
469 13.8 7.03 × 104
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 80.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 1.51 5870
40.0 2.01 7820
50.0 2.52 9780
60.0 3.02 1.17 × 104
70.0 3.52 1.37 × 104
80.0 4.02 1.56 × 104
90.0 4.53 1.76 × 104
100 5.03 1.96 × 104
200 10.1 3.91 × 104
275 13.8 5.38 × 104
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 90.0 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 2.42 7430
40.0 3.22 9900
50.0 4.03 1.24 × 104
60.0 4.84 1.49 × 104
70.0 5.64 1.73 × 104
80.0 6.45 1.98 × 104
90.0 7.25 2.23 × 104
100 8.06 2.48 × 104
172 13.8 4.25 × 104
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 100 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 3.68 9170
40.0 4.91 1.22 × 104
50.0 6.14 1.53 × 104
60.0 7.37 1.83 × 104
70.0 8.60 2.14 × 104
80.0 9.83 2.44 × 104
90.0 11.1 2.75 × 104
100 12.3 3.06 × 104
113 13.8 3.44 × 104
Steel I Beam: W14 × 30 (Wide Flange 14 inch tall × 30 lbf/ft)
L = 125 ft
P (lbf/ft) w_max (in) stress_max (psi)
30.0 9.00 1.43 × 104
40.0 12.0 1.91 × 104
46.2 13.8 2.20 × 104
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