This document contains calculations to determine the internal forces in different sections of a structure. It solves for the axial force (Ay) and shear force (Dy) at the whole structure level and then breaks it down into sections. For each section it determines the shear force (V) and bending moment (M) by setting the sum of the forces and moments equal to zero and solving the system of equations. The key internal forces determined are Ay = 14.48 kN, Dy = 33.02 kN, and the varying V and M values over x for each of the three sections.