RV Roof Construction

I have a question about truss style rafter construction for my walk-on roof. I wish to run a cable through/across the rafters towards the front of my trailer. My question is how are these rafters made and most importantly are they hollow?  I am trying to accomplish this without any drilling through anything. It is a PacificCoachWorks trailer 2014. Bill M.

Bill, according to Pacific Coachworks, all PCW units have wooden roofing structural components, including their trussed-roofed trailers. It would be very difficult to route any conductor or cable though the roof. But because they have ducted air conditioning, it might be possible to snake a cable alongside the duct work, at least part of the way. Depending on what you’re installing and how far the run would extend beyond to two extreme ducts, of course. Though the sidewalls are constructed using hollow aluminum tubing, the rafters are all solid wood, unfortunately.