AOExpress, if you click on "Find Trucks" at the top of the page under the Expediters Online.com Logo, and look up International you will see what I'm talking about. There's a few Int. straight trucks with attics that have moving co. style boxes and those TX style sleepers I was telling you about. Although they are double bunks that are 32". From the bulkhead wall to the rear is probably about 25 feet. You can get them with 24" bunks as well, usually they're tiny bunks, usually single bunks, with storage under them that has an access door on the outside. These that are for sale are 30k, they're '05 models. beneath the bottom bunk it looks like that's where they've placed an open storage area.
I don't like the design on the trucks I'm showing you, but at least you can get the general idea. There's a reason I don't like this particular layout, one good fart from the bottom and the person sleeping on the top bunk is like a rat in a capped soup can. They're going to be scrambling for fresh air... Not to mention the space shown here of 32" with a double bunk is a tight area. What would be the quality of sleep for 2 people plus a driver?
The vent is also shown for the top bunk only from what I saw.
So where does the bottom bunk get it's air from?
A single bunk with a storage area that goes the width of the truck under the bunk is the ideal choice, with a flip-up bunk as well. Be sure there's a light on each side of the storage area- so when the exterior doors are open at night there's a light under the bunk so you can see where those tools are in the tool box easier.
Provide reading lights in the bunk and a solid thick black vinyl curtain with velcro closure (or zipper, but zippers can break easier than the velcro can).
Make sure the curtain goes the full length top to bottom of the curtain AND Opening.
There's multiple ways to layout the truck and sleeper. I would keep a 24" to a 32" sleeper, and perhaps the attic as well. I would also put 2 vents on each side, and perhaps a window on each side as well, with a screen on the window and dark tint on the glass.
Designing the truck this way would allow your moving co. to utilize this truck for a long distance move with a tight schedule and eliminate stops for motels. When you're not using it for regular moving, you can expedite off a load board and/or run irregular freight anywhere you are legally allowed to run it.
What size are your fuel tanks on your current trucks? are they dual fuel tanks or ?
What is the empty weight of your current trucks with a driver and regular gear onboard?
BBB