You could keep sheets of drywall or glass in there without exposing them to scratches or deformation from road grit or the elements. Looks like it’s for transporting large flat somethings vertically. Paintings?
It’s for transporting exotic dancers.
No, no! It’s clearly a mobile art installation exploring the existential angst of the car wash!
Or something.
Why, obviously this truck is owned by the company that equipped the Batcave!
It would help if you posted a picture of the writing on the side of the truck.
I don’t remember ever being on the side of it. I was riding in a tow truck at the time on the way to the garage.
Heck, if I knew what business it was in, I would have Googled it myself.
Your truck appears to be transporting giant toasted marshmallows on skewers. They may have left them over the fire a bit too long. 
Its for transporting theater back drops and scenery. My husband’s litter theater had one like it.
:smack: LITTLE LITTLE
What better place to stage Cats?
What sort of trash did they act out?
That was a throw away line.
Booo! Rubbish!
Starring Iron Eyes Cody!
Wow, has this really stumped the board? That’s got to be pretty darn rare.
You missed the part where **picunurse ** said it was for transporting scenery backdrops.
If you look carefully at the bottom of the straps, you can see that they are hooked to rings in the floor. Unhook the cables, and they should retract up to the ceiling, leaving the cargo area clear for large items. Set up like the photo, you store flats in there, on edge. As picunurse said, it’s for theatre.
DancingFool