1. For the pinned frame below subjected to a 500 kN lateral force, what are the internal forces in each member?
2. For a design allowable tension stress of 140 Mpa and a design allowable compression stress of 100 Mpa(do not use safety factors), what is the required cross sectional area of each member?
3. The structure is assembled at 70 F and then heated to 300 F. What is the axial thermal stress and strain in AB if the structure is made out of wood (CTE= 0.000020/degF) or aluminum (CTE=0.0000129/degF)?
4. Lets design the members if they are made of wood(compression and tension design strength = 5000psi) or aluminum (compression and tension design strength= 20000psi). Do not use any safety factors. Can you use any of the wood or aluminum pieces shown below.