Question: A vertical post AB is embedded in a concrete foundation and held at the top by two cables (see figure). The post is a hollow

A vertical post AB is embedded in a concrete foundation and held at the top by two cables (see figure). 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 3.0 against Euler buckling in the plane of the figure is desired, what is the maximum allowable tensile force Tallow in the cables?

Cable 40 mm Steel tube Turnbuckle 2.0 m 20 m

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