A W21x73 is supported on simple supports on a 30-ft span. Calculate the plastic moment Mp. Assume that Fy=50 ksi.
A W21x73 is supported on simple supports on a 30-ft span. Calculate the plastic moment Mp. Assume that Fy=50 ksi.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A W21x73 is supported on simple supports on a 30-ft span. Calculate the plastic moment Mp. Assume that Fy=50 ksi.
TABLE A.1 U.S. Customary units
Designation A in.?
d in.
,in.
Dy in.
1, in.
S, in.
in.
,in Z, in.
S, in. in.
W40 x 277
81.5
39.7
0.830 15.8
1.58
21,900
1100
16,4
1250
1040
132
3.58
W36 x 302
89.0
37.3
0.945
16.7
1.68
21,100
1130
15.4
1280
1300
156
3.82
W36 x 194
57.0
36.5
0.765
12.1
126
12,100
664
14.6
767
375
61.9
2.56
W36 x 150
44.3
35.9
0.625
12.0
0.94
9040
504
14.3
581
270
45.1
247
W33 x 118
34.7
32.9
0.550
11.5
0.74
5900
359
13,0
415
187
32.6
2.32
W30 x 108
31.7
29.8
0.545
10.5
0.76
4470
299
11.9
346
146
27,9
2.15
W30 x 99
29.0
29.7
0.520
10.5
0.67
3990
260
11.7
312
128
24.5
2.1
W27 x 114
33.6
273
0.570
10.1
0.93
4080
299
11.0
343
159
31.5
2.18
W27 x 94
27.6
269
0.490
10.0
0.745
3270
243
10.9
278
124
24.8
2.12
W24 x 162
478
25.0
0.705
13.0
122
5170
414
10.4
468
443
68.4
3.05
W24 x 104
30.7
24.1
0.500
12.8
0.75
3100
258
10.1
289
259
40.7
2.91
W24 x 84
24.7
24.1
0.470
9.02
0.77
2370
196
9.79
224
W24 x 76
22.4
239
0.440
94.4
20.9
1.95
8.99
0.68
2100
176
9.69
200
W21 x 83
244
21.4
0.515
82.5
18.4
192
8.36
0.835
1830
171
8.67
196
W21 x 73
21.5
212
81.4
19.5
1.83
0.455
8.3
0.74
1600
151
W21 x 62
18.3
8.64
172
70.6
17.0
181
21.0
0.400
8.24
0.615
1330
W21 x 50
127
8.54
144
57.5
14.0
1.77
147
208
0.380
6.53
0.535
984
W18 x 71
94.5
8.18
110
24.9
7.64
13
209
18.5
0.495
7.64
0.81
WIR 60
1170
127
7.5
146
60.3
16.8
176
18.2
0.415
7.56
1.7
0.695
984
108
7,47
123
50.1
133
WIA 50
14.7
18.0
0.355
168
7.5
0.57
800
88.9
7.38
101
WIR & 40
11.8
179
40.1
10.7
1.65
0.315
6.02
0.525
612
o0ו א5נא
294
68.4
7.21
78.4
19.1
6.35
127
170
0.585
10.4
0.985
1430
7.1
W16 x 46
175
198
186
35.7
2.51
133
16.1
0.345
7.04
0.565
W16 36
586
72.7
6.65
82.3
328
9.34
1.57
306
159
0.295
6.99
O.43
W16 - 26
448
565
6.51
640
24.5
7.0
1.52
768
15.7
0.250
5.5
0.345
301
38 4
6.26
44.2
9,59
349
1.12
O a.717 kpis ft
Ob. 629 kpis ft
Oc 160 kpis ft
Od 184 kpis ft
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