Truss from Trapezoidal Surfaces?

Hi guys, generous experts out there.
I wouldn't have come here to ask if I didn't already try searching..

I'm working on drawings sections for my thesis project. and I have only 10 days left for the whole production period.
 
I've created a roof surfaces in trapezoid forms.



They aren't aligned  in the floor plan so I guess the best way to help me is to model a 3D trusses for all of the roofs.

Is there a way, suggestion where I should look into? on how to create a 'roof truss' from surfaces. Or even a method on how I should start?

I have very basic knowledge of grasshopper so I could try to re-adjust and apply it to my model. 

I tried to find a way, and spend too long then failed.
so I decided to ask for suggestions here.

If you have time and know how I should start, please suggest me..or even if there is a similar script out there that I could modify to fit my need, please tell me.

I'd very much appreciate this !
and my thesis shall be completed with all your help.

P.S. I've attached the .3dm file of the trapezoid surfaces.

Thank you again !