I’ve not seen Winnebago TT being built, but I have toured the Arctic Fox factory and seen YouTube videos of others.
They start with the frame for the chassis - some frames are made in-house and some are purchased from suppliers. They drop in tanks and heating ducts. Usually they then put down plywood underlayment and one big sheet of vinyl flooring. Unlike motorhomes they start building the inside furnishings before any walls are added. Depending on the type of TT walls might be built with wood framing or aluminum framing.
At Arctic Fox they did both when I toured ten years ago. All 5th Wheels there got walls made pre-fab on a big table. Aluminum framing, wiring, foam insulation, etc laid out then Filon sheeting was glued down and the whole wall was bagged and vacuum sealed to pressurize the wall. This was flown into place on the partially built up TT.
The wood built TTs were built like houses built out of 1x2 framing and the exterior was applied after all the plumbing, electrical and insulation were put in place.
Roofs were added last and the interiors were finish. But there wasn’t the same automation you see at motorhome factories. Everything was more manual process and built up from the floor upward.
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2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
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