Platform · Medium-duty trucks
When a van or cutaway runs out of payload, clearance, or range, the same composite build steps up to a thicker 2.5-inch panel and a four-point Zero-Torsion subframe on a medium-duty chassis — Ford F-450/550, Ram 5500, or Chevrolet 4500–6500. It’s a full expedition cabover, custom-sized to the payload, range, and clearance a bigger trip or job demands.
At a glance
A medium-duty chassis brings a much higher payload ceiling, room for larger fuel and water, super-single wheels and serious ground clearance, and the frame strength to carry a bigger habitat off-road for years. If you’re building for full-time expedition travel, heavy systems, or a demanding commercial mission, the medium-duty cabover is where the platform goes.
The body steps up from the van’s 1.5-inch R11 panel to a thicker, higher-R (R17) 2.5-inch composite panel, mounted on a four-point Zero-Torsion subframe. On a longer, heavier body over a flexing medium-duty frame, the multi-point subframe manages the greater loads and torsion — letting the chassis articulate while the habitat stays square. It’s the same principle as the E-Series subframe, scaled up for the duty.
On medium-duty trucks we build and install the full composite cabover as a final-stage manufacturer, custom-sized to your chassis and cab configuration. From there the interior is finished by you or your professional builder. If you already run an F-550, Ram 5500, or Chevrolet chassis, we can usually build on it.
Real builds
Common questions
Ford F-450 and F-550, Ram 5500, and Chevrolet 4500–6500 are the common medium-duty choices, but we can build on just about any chassis. If you already own it, we can usually build on it; we can also coordinate the chassis as part of the build.
It uses a thicker 2.5-inch composite panel on a four-point Zero-Torsion subframe, with a queen or king cabover, and it is custom-sized rather than offered in fixed van lengths — because the payload, clearance, and range targets are higher.
Yes — medium-duty builds are sized and quoted to your specific chassis and use. Tell us the truck and how you’ll use it and we’ll put together sizing and pricing.
Related
Start a project
Tell us the chassis and the payload, clearance, and range you need, and we’ll size a composite cabover for it and put together pricing.
The message form is loading. You can also email info@foundationvehicles.com or call 720-610-1562 any time.
