A vertical post $AB$ is embedded in a concrete foundation and held at the top by two cables

as shown in the figure below. The post is a hollow steel tube with modulus of elasticity

$200$ GPa $,$ outer diameter $40$ mm $,$ and thickness $5$ mm $.$ The cables are tightened equally by

turnbuckles. If a factor of safety of $3\mathrm{.}0$ against Euler buckling in the plane of the figure is

desired, what is the maximum allowable tensile force Tallow in the cables? Consider post

AB as a fixed$-$pinned end condition and neglect the weight of post and cables $($Ans$.$

$T=18\mathrm{.}1kN).$A vertical post $($AB$)$ is fixed in a concrete foundation and held at the top by two cables $($fixed$-$pinned$).$ The post is a hollow steel tube with E $=207$ GPa, Sy$=250$ MPa, an outer diameter of $40$ mm$,$ and a thickness of $3$ mm$.$ The cables are tightened equally by turnbuckles. If a safety factor of $3\mathrm{.}5$ is desired, what is the maximum allowable tensile force Tallowed in the cables? $($You can use the equation for derived in class$)$