3) Find the most economical wide flange section for an A992 steel beam (E = 29 x 10 ksi) which spans 30 ft. having point loads of 9 k dead load and 18 k live load at 10 ft spacings across the span with lateral bracing only at the loading points using LRFD. Assume the total load deflection limit is L/240. (See Table 3-10 provided.)
3) Find the most economical wide flange section for an A992 steel beam (E = 29 x 10 ksi) which spans 30 ft. having point loads of 9 k dead load and 18 k live load at 10 ft spacings across the span with lateral bracing only at the loading points using LRFD. Assume the total load deflection limit is L/240. (See Table 3-10 provided.)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Table 3-10 (continued)
W-Shapes
Available Moment vs. Unbraced Length
香50 ksl
Co 1
Table 3-10 (continued)
W-Shapes
50 ksl
kip-ft
ASD
klp-f
LRFD
klp-t
klp-ft
Available Moment vs. Unbraced Length
ASD
LAFD
200
300
300
450
W12x79
W14x4A
196
294
435
W12
W14x68
列
192
288
280
420
wal50
188
282
270
405
184
276
200
300
Wit40
180
270
250
075
176
264
240
172
258
345
168
252
220
130
Wi6x35
164
246
210
315
160
240
200
300
W16x36
12
Unbraced Length (0.5-ft Increments)
10
14
10
Unbraced Length (0.5-ft increments)
12
14
16
18
16
18
20
Wi
W12xB7
W24r
हाजी
WI8GO
WA62
Available Moment, M, 2 kip- increments) and 40kipR increments)
WIES
W21x48
Wie.
Wauss
Wi53
W WI650
wi
W24x55
M21244
W14x48
WIENS
WIB40
wio
ल
Available Moment, M. (1 kip-it increments) and M. (1.5 kip-ft increments)
Transcribed Image Text:3) Find the most economical wide flange section for an A992 steel beam (E = 29 x 10° ksi)
which spans 30 ft. having point loads of 9 k dead load and 18k live load at 10 ft spacings
across the span with lateral bracing only at the loading points using LRFD. Assume the total
load deflection limit is L/240. (See Table 3-10 provided.)
%3D
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