sm7 61

________________________________________________________________________
PROBLEM (7.61) Re-solve Prob.7.60 for a built-up beam of the cross section shown in Fig.
P7.61.
SOLUTION
(a) From solution of
y
Prob. 7.29:
46
107.424 mI − ×=
We have, at welds:
)5.208(10240
×
=
Q
33
104.500 mm×=
63
6
(500.4 10 ) 2(200 10 )
424.7 10
VQ V
qI
−
−
×
== = ×
×
Solving kNV 5.339=
(b) 3
max 3
2(200 10 ) 51.9
7.7(10 )
VQ
M
Pa
Ib
τ
−
×
== =
240 mm 10 mm
407 mm
z
0 mm 1
208.5 m
m
C
7.7 mm
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