slide platform materials/construction ?

[MTCamper]

I have a 2014 16DBS. Does anyone know what/how the base platform that the sofa sits on is constructed? I know there is a thin aluminum sheet on the bottom, a piece of edge trim around it and a decorative sheet on top. Anyone know what is sandwiched in between? Since the sofa base is screwed down through the top surface I am wondering what these screws are actually biting into for holding power as it does not seem to be the aluminum tubing. Thanks in advance for any help.

[Paul]

In my 2015 13QBB I removed the sofa and I believe it was biting into something I believe it was the aluminum tubing but I am not a 100% sure

[MTCamper]

Thanks Paul. The platform itself is 1 3/4" Since it is a thin aluminum sheet on the bottom and the azdel panel on top my guess is it has foam insulation sandwiched in between. I am wondering what the (assumed) aluminum frame structure is size wise and spacing. I have two long screws (one on each end) that protrude below the bottom by 1 1/4". A poor repair job by the previous owner to deal with the original screws that were obviously pulled out. Maybe it was a poor install to begin with. I need to fix those and I am trying to decide on how best to install a table mount that will require me to drill through the platform. I obviously would like to hit something substantial rather than a block of foam. I was looking at the mod pictures GrandpaKilt posted and noticed the computer monitor table mounts seem to be mounted to the edge. Just trying to avoid drilling a hole I regret.

[Merlin]

I realize it is a different camper, but if you have not seen this, it might help you visualize the structure.

https://m.youtube.com/watch?v=XZtOIbisE4M

[DavidM]

That looks like our 2013 16TBS.

David

[GrampaKilt]

Alas, my CL is not a slide version. As for my table mount, the metal screws bite into a 1" x 2" x 1/16" aluminum tube, welded in flat, covered by adzel. The screw holding power of 1/16" aluminum is pathetic, just a slight overtorque and the bite is gone. I cut out the adzel to gain metal on metal, put in 3 #14 screws and for good measure added some good cyanoacrylate glue. In a few other places where I have stripped screws (and if accessible), I use bolts. 

One trick I learned for stripped screws is to insert some 16 ga or so stranded copper wire into the hole and try again along with a dab of my trusty AC glue.

I'm sure a plethora of other forum members including myself have a few other ideas for securing fixtures into soft substrates so feel free to keep posting any challenges you encounter with this mod. GK