consegna 3
1. first i create family, then open generic metric model curtain wall
2.i acces family type new parameter then shared parameters i entered, s_lenght, s_width.s_height
3.i imported new family and positioned it.
4. i modified it for instance parameter.
5. i aligned it with refernce lines
6. i created new project
7.i create a curtain wall and refenance plane.and aligned it and moved it aside.
8. i saved the curtain wall and loaded into the project.