Don;
The new Haulmarks that I saw all had the coach floor and basement framing built and mounted by a sub contractor and they were raised off of the truck frame rails by about 8'', haulmark then installs the subfloor and builds the wall and roof framing and installs the waste tanks, slideout mechanisms and lower wire harness as required, the chassis and framework are then moved into a different building where the build continues away from the heavy fabrication of the structure. Their was a pallet with pre made waste tanks in the frame fab shop. If you are ever in the Elkhart area you would probably enjoy a factory tour, just call and arrange a time that works with them.
shorts
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