Problem $6$

Given a flexible pavement surface layer $8$ inch thick resting on a semi$-$infinite subgrade, compute the surface deflection under the center of a tire inflated to $90$ and has a radius of $5$ inches using the Burmister method. The layer moduli are $300$ksi and $15$ksi, respectively, and is is $0\mathrm{.}5$ for both.

Given!

$sin$