What is the maximum allowable value of P with respect to buc

What is the maximum allowable value of P with respect to buckling in the trusses? Assume the truss members have a modulus, E, of 29,000 ksi and moment of inertia, I, of 16.9 in^4. 13.6 kip 29.7 kip 16.8 kip 18.5 kip 21.0 kip

Solution

As shown in the figure, modulus of elasticity is 29,000 ksi.

Moment of inertia = I = 16.9 m²

The maximum allowable value of P for the buckling is 29.7 kip