Timber Column Axial Load Problem Solution

________________________________________________________________________
PROBLEM (11.75) Determine the allowable axial load P for a built-up timber column of the cross
section shown in Fig. P13.75. The effective length is Le = 15 ft.
Given: E = 1.6 x 106 psi, σall = 2 ksi
SOLUTION
, 15 12 180 .
e
Lin=×= 22 2 2 10 7 51 . 10 . 18
e
AindinLd
=
−= = =
Use Eq. (11.32) :
6
2
0.3(1.6 10 ) 1.48 2
(18)
all ksi ksi
σ
×
==
<
ips
Thus,
1.48(51) 75.5
all
Pk==
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