1. The problem statement, all variables and given/known data I am trying to find a solution to the below attached image. The area for AB=CD = 0.8m^2 Area of BC = 0.3m^2 Force at B = 140 kN (left) Force at C = 60 kN (right) AB=CD = Concrete with a E of 25,000N/mm^2 CD = Steel with an E = 200,000N/mm^2 2. Relevant equations PL/AE 3. The attempt at a solution This is where I get confused because there is a force acting at B and a force acting at C I am not sure if I need to make a cut at say B or make a cut at C. I understand the the sum of the forces in X direction have to equal Ax + Dx = 80 kN (As a result of 140 - 60 kN) Now taking BC as the redundant section PL/AE for section AB should that of section CD? I am not sure if I am going about it the right way? If it was one continuous section with forces only in one direction or even two I understand but because of that section BC it has thrown me out .