Rigid beam ABC is supported by rods $(1)$ and $(2)$ that have identical lengths of $L=7\mathrm{.}2m.$ Rod $(1)$ is made of steel $E=200$GPa and has a

cross$-$sectional area of $145m{m}^2.$ Rod $(2)$ is made of aluminum $[$E $=70$ GPa$]$ and has a cross$-$sectional area of $260m{m}^2.$ Assume

dimensions of $a=1\mathrm{.}9m$ and $b=3\mathrm{.}8m.$ For a uniformly distributed load of $w=14k\frac{N}{m},$ determine the deflection of the rigid beam at

point $B.$ Downwards deflection is positive.

Answer:

$v_S=i$