Ours was okay side to side but the roof was/is too low, I seriously couldn't turn over up there. My shoulders would get stuck
Part of the issue on mine is the chassis is a full semi so they can't go up too much in the front and stay 12'6" - without doing a weird ass bulge up there. Doesn't bother me, have two couches, the dinette, the bed, and the floor for sleeping if need be.
Way late to this thread....Soooo, there is no side structure/frame...the cabinets and interior are the structure? (Interesting, I never saw the sausage made).
My old racing partner used to say; "Two things you do not want to watch being made, sausage and legislation."
Mainly the FRP is the structure - same as that Renegade trailer I had behind the RV. Just some bracing inside.
There is an AL frame on the sides, and either steel or AL in the floor. The spaces in between these AL tubes will be filled with EPS foam insulation. The exterior is made form FRP outer skin, maybe .04-.080" thick. Usually some ~1/8" luan plywood laminated to the FRP. This outer skin is then laminated to the AL/foam frame. The interior is similar, luan plywood is laminated to layers of the interior vinyl, fabric, etc and then laminated on the frame. These walls are very strong do to the large surface area that is glued together. Even if the glue to EPS is only a few psi, you have 10-20,000 square inches bondede. This is for a smooth sided trailer or motorcoach. If the sides are corrugated, then its probably a "stick and tin" model. 2x2 wood framing, filled in with insulation bats and the same type of laminated interior but with the corrugated tin for strength and structure on the outside. Cheaper way to build. I go to several of these assembly plants and lamination plants for Jayco, Keystone, Thor, etc everyday. They all build basically the same way from the same suppliers. Some use nicer stuff and do a better job than others.
Yeah, I saw the pictures of the start and all the way thru, steel frame base...just surprised there is NOT any framing uprights WELDED to the sides and roof..I kind of thought they built differently...no wonder the one I saw rolled over on the Interstate a few years back looked like an unfolded shoebox...it was.
yeah. they are all bolted on, sides, roof etc. help the plants are so busy, they are building tons of more assembly plants, they can't get enough workers. welders especially. some of them are using structural adhesives instead of welding the frames. just tacking them. all that Al is spool gunned anyways. no time to tig it. tack it, pull it off the jig and ship it....