The length of the structural beam is L = 144 in. The moment of inertia of its cross section is I = 6 in 4 , and the modulus of elasticity of its material is E = 32E6 psi. It is built-in at both ends...

The length of the structural beam is
L
= 144 in. The moment of inertia of its cross section is
I
= 6 in⁴, and the modulus of elasticity of its material is
E
= 32E6 psi. It is built-in at both ends and
w
₀
= 400 lb/in. Determine the deflection of the beam at
 = 36 in. (See the figure for Problems 9.44–9.46.)