Mounting a truck camper on a chassis truck.

On a chassis cab truck, the relationship of the rear axle to the end of the truck frame is about the same as it is on a pickup. The distance between the rear axle and back of the cab is what changes as the chassis cab wheelbase changes.

In other words, as long as the utility bed you put on your F550 doesn’t have a huge rear overhang relationship to the frame rails, the COG of the camper is going to be in about the same place over the rear axle.

Ford’s website shows a standard 47.2” distance from the rear axle to the end of the frame rails. I would assume that’s measured from the center point of the axle. All of the pickup trucks show a standard 52” rear overhang, but that would include the bumper. I just measured my F450 pickup rear overhang, and it’s closer to 50”.

You’ll need something in front of the camper to keep it from sliding forward, but that should be a no-brainer. Toolbox, fuel tank, spare tire, etc.

:):)

Kayteg1 wrote:
The chassis I know not only have frame that is not perfectly flat, but is narrower, when TC need support under the edges..

The chassis probably are, but the flatbeds and utility beds aren’t.

The chassis I know not only have frame that is not perfectly flat, but is narrower, when TC need support under the edges.
Meaning you need to add at least frame under camper floor perimeter.
I think quick fix might be 1 1/8" floor plywood, but that will sag over the time.

Take a look at some of these Truck Camper Magazine articles:

articles about extreme rigs

flatbed articles

chassis mount articles

None of them seem to be exactly what you describe, but they may provide ideas of possible sources.

My RV is a 2006 Tiger CX, a small chassis-mount built on a stock Chevy 2500 HD 4x4 chassis. Not a TC, a true C with pass-thru between cab and camper. This CX model is no longer made. Newer ones are larger. Tiger Vehicles

You might also find clues to this sort of rig at Earthroamer