A guy cable is thrown over an Ipil post $150mm$ in diameter. The allowable shear stress is $1\mathrm{.}04$MPa

parallel to the grain and $1\mathrm{.}56$MPa perpendicular to the grain. Find the tension in the horizontal cable as

determined by the shearing stresses:

If the Cable is next to the ground $($Answer should be: $27\mathrm{.}57kN)$

If the Cable is $0\mathrm{.}90m$ above the ground $($Answer should be: $13\mathrm{.}78kN)$