Dump trailer question?

[Claus]

I have been around a lot of dump trailer but never seen one with a tank on it like this. My only guess is to spray the box to keep material from freezing but the tank seems awfully large for that.

Any ideas?

http://www.mactrailer.com/uploads/dumptrailers6-1.jpg

[rockNmayhem]

I've seen a couple of trucks and trailers around here like that. Most of the time they are heated tanks pumping hot water through the body of the trailer keeping asphalt hot and less likely to stick. I'm not sure if thats what that one is for but I'm sure its along the same principle lines maybe?

Tyler

[sandfarmer]

Hmm, around here there's just not much asphalt layed in cold weather. That could be what it is just never seen one. Don't see any plumbing to give it away either.