Build: Ram 3500 and Aluminum/Composite Expedition Camper

TrailTestedMFG

Active member
Welcome to the documentation of our build!

Intro:
My wife Courtney and I have decided to make the move towards full time adventure. We currently live in a self built shipping container house:
To anyone considering tiny living I say go for it and never look back. Simplify your life and focus on what matters to you! Living tiny has helped us realign our life goals, expectations, and ambitions to focus on what is important to us. We plan to spend the next year or so traveling the US, snow skiing, mountain biking, and off road exploring. We would love to hear about your favorite trail or Overland destination so we can add it to our route!

The build:

The truck is a 2015 Ram 3500 CCSB 6.7 CTD.

Last summer I was shopping for a Lance 825 when a perfect combo came up for sale. Here is what it looked like when we bought it:

80203478_10156496670965919_1966271908265590784_o.jpg

Sadly, that is not my picture. That was an adventure that the previous owner got to enjoy. A business decision forced the sale of the camper shortly after purchasing to help fund the remodel of an investment property. However, I felt like the overall size of the 825 was ideal for our needs many design decisions have been based off this camper.

So what's the plan?

We're building a permanently mounted hard side truck camper using lots of aluminum, foam, glue, and plywood! The basic build plan is to create an aluminum exo-skeleton and fill in with composite panels (major inspiration credit goes to the Everlanders). The goal is the build an expedition camper capable of supporting full time life for two (plus our dogs). We approached many many different build techniques. Ultimately it came down to: What can we build with the tools and materials available to us, in a time efficient way, so we can get this show on the road!?

Here is a rendering of what we plan to create:
Final Rendering.png

Step 1 is to remove the bed and start laying out the sub frame. This is 2x2x.125 6061 Aluminum.

IMG_20201101_150049.jpg

After tacking the sub frame I clamped it up as best I could to avoid warping and welded it out. I planned on TIG welding but my first attempt was awful. I discovered a mouse had chewed the liner on the lead and I wasn't getting any shielding gas at the weld. Rats! A new lead is on the way, until then I'm using my spool gun and having really good results!

IMG_20201103_071849.jpg

This project is going to require lots of sheet metal bending. So when I discovered an 8' brake for sale locally I jumped on it. However, I have no place to put it. So for now it lives on my trailer.
IMG_20201030_100237.jpg

Here I am using our 4x8 Arclight Dynamics CNC plasma table to cut out some of the first parts for the body.

IMG_20201103_101844.jpg

We vacation rent our house out (part of the whole tiny living thing) which restricts access to the garage/shop sometimes. I decided to relocate to another spot on the property and keep making progress. The weather has been beautiful and working outside has been pleasant. Wheel well liners and the lower parts of the exo-frame are tacked together.

IMG_20201104_135441.jpg


The structure is starting to come together. These parts are .080 5052 Aluminum. Just a few tack welds and this thing is starting to really stiffen up.

IMG_20201105_135617.jpg

In between all this we've been gluing up our composite panels. We try to build one per day to let them cure for at least 24 hours. The construction is 0.050" 5052 aluminum laminated to 1" Foamular 150, laminated to 1/4" UV coated birch plywood. The aluminum goes on the outside, the plywood on the inside. For glue we are using Loctite PL Premium polyurethane. The key is to mist it with water to promote proper cure. When I supported our 2'x2' test sample on the ends and jumped on the middle there was no noticeable deflection. In order to make the panel fail I had to mechanically separate it with a pry bar. The foam failed, the glue bond did not. I know there are lots of much cooler composite panels out there but I think these will serve their purpose very well and we are able to make them ourselves with the tools we have and the materials readily available to us (still had to drive 3 hours to get the foam!).

IMG_20201102_183758.jpg


If you want to see more, check out our first YouTube episode. Please give us a thumbs up or comment and subscribe, it will help us out!

 
Last edited:

Lance990

Observer
I was just thinking to myself today that there just aren't enough YouTubers peddling their channels here on EP.
 

ITTOG

Well-known member
Looking forward to this build. I have always wondered why no one used wood on the inside. Now I can see how yours turns out before I do it on mine.
 

rruff

Explorer
Love it! Really like the use of aluminum skins, and wood is nice on the interior. You are doing some things that seem risky, but you are getting it done, so what the heck... not dinkin around forever like me. :ROFLMAO:

How do you plan to join the panels edge-edge without interrupting the structure of the skins?

Have you though about hard points? Pretty sure you don't want to attach anything heavy only to the aluminum. It will pull the foam loose underneath. You can go all the way through the panel; just make sure you keep water away from the wood.

You mentioned that you didn't think frame flex would be an issue and it may not be, but I'd suggest parking your truck crosswise in a ditch and see if you are comfortable with it.

Best of luck to you!

Looking forward to this build. I have always wondered why no one used wood on the inside. Now I can see how yours turns out before I do it on mine.

I made one 20 years with panels made of 2.7mm luan, and an exterior coat of fiberglass. Plenty solid. It's nice to have wood on the inside.
 

ITTOG

Well-known member
I made one 20 years with panels made of 2.7mm luan, and an exterior coat of fiberglass. Plenty solid. It's nice to have wood on the inside.

So I was thinking about the same as yours but with ACM instead of the fiberglass.

Did you fiberglass the corners or use exoskeleton.

Sent from my Pixel 5 using Tapatalk
 

rruff

Explorer
So I was thinking about the same as yours but with ACM instead of the fiberglass.
Did you fiberglass the corners or use exoskeleton.

Since I was using ply skins anyway, I had vertical 1x2s in the panel every couple feet and at the edges. So I just screwed and glued them together. The fiberglass was wet laid... mostly to give it a hard external shell.

I almost did the same on the one I'm making now, but decided to go "wood free" to try something different.
 

TrailTestedMFG

Active member
How do you plan to join the panels edge-edge without interrupting the structure of the skins?

Have you though about hard points? Pretty sure you don't want to attach anything heavy only to the aluminum. It will pull the foam loose underneath. You can go all the way through the panel; just make sure you keep water away from the wood.

You mentioned that you didn't think frame flex would be an issue and it may not be, but I'd suggest parking your truck crosswise in a ditch and see if you are comfortable with it.

Thanks for the reply. I plan to overlap the aluminum side by building one of the panels with a 2" flange overhanging that can then be bonded to the other panel. On the inside it will get some kind of trim bonded to both sheets of wood. This is only a problem in one joint on each side and one on the back. There will also be cabinetry on the inside to further reinforce.

I'm not sure what you mean by hard points. Nothing substantial will be attached to the aluminum skin.

That's probably a test worth doing however it doesn't seem valid without any weight on the truck. I'm still undecided on whether to use springs in the back to "clamp" the camper down or to directly bolt it down. In low speed cross axle situations it seems like having the springs would be better. In all other scenarios it seems like having it bolted down would be better to eliminate weird dynamic forces, poor handling from sway, or the camper lifting and crashing back down on the frame.
 

rruff

Explorer
Sounds good. An overlap should work.

You show a ladder, top rack, and bike rack. How will these be attached?

I think you'll be able to tell... the flexible frames will twist like crazy even with no weight. By hard mounting you make it much stiffer, and your flatbed and camper end up taking most of the load. Also the frame may get overstressed at the transition (forward mounts). You say the panels will flex enough, and indeed they may... but since you are using weak foam I think it adds extra risk. On the other hand I saw some photos and videos showing that the newer Rams are pretty stiff, so you might be fine.

You are right about dynamic mounting. It's a trade-off between on-road and off-road performance I think, and tough to get just right.

Anyway, try it and see... if it passes the "ditch test", you'll have some peace of mind when hard mounting it.
 

TrailTestedMFG

Active member
You show a ladder, top rack, and bike rack. How will these be attached?

The rendering in my first post is more of a concept rendering, and should not be referenced for construction. Although I definitely understand your concern. Roof rack, ladder, bike rack, etc will be integral to the exo-skeleton and add to the overall structure. The spare tire will be tied to the bumper. I don't want that weight hanging off the camper.
 

rruff

Explorer
Cool... sounds like you are taking into account the important factors.

I like exoskeletons... seems like a good way to go, especially if you have CAD skills.
 

Jonnyo

Observer
The rendering in my first post is more of a concept rendering, and should not be referenced for construction. Although I definitely understand your concern. Roof rack, ladder, bike rack, etc will be integral to the exo-skeleton and add to the overall structure. The spare tire will be tied to the bumper. I don't want that weight hanging off the camper.


would it be easier to get big sheet of continuous aluminum vs laping them to make the walls? it would be easy to find some .040 in 8.5 roll and that is plenty strong for a composite wall? asking as i m thinking of going that route and find the roll of aluminum cheaper then 4x8 sheet.
 

Forum statistics

Threads
188,543
Messages
2,906,582
Members
230,598
Latest member
Bobah
Top