Truss deformation

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Truss deformation


I'm writing because I have a problem that I don't know how to solve.
I would be thankul if someone could help me solve this problem.

The problem is as follows:

The truss is made of a steel member and copper member. The truss is subjected to a force F at point C and the steel member is subjected to a temperature increasement of 600K. The cross sectional area of copper is Acu=500 mm^2 having an elasticity modulus Ecu=10^5 MPa, and steel is As=350 mm^2 with Es=2*10^5 MPa.The thermal coefficient of steel is 12*10^(-6) K^-1 The angle beta is 15°. The force is F=25kN and the angle gamma is 18°. The lenght is a=2,5m. By how much does point C move?


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