________________________________________________________________________
PROBLEM (11.61) Redo Prob. 11.60 for an S 20 x 75 steel column (.see Table B.9).
SOLUTION
S20x75 :
2
22.1 . 1.16 .Ainr==in
in
From solution of Prob. 11.60:
2
121.7 151.2 .
c
CL==
We now have
151.2 1.16 130.3
ec
Lr C==>
Apply Eq. (11.25)
26
2
(30 10 ) 9.08
1.92(130.3)
all ksi
π
σ
×
==
and
9.08 22.1 201
all
Pk=×= ips
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