I like this topic/thread for one reason - there are nice people that contribute and in 227 pages there have been no "word fights". There is a whole lot of respect shown in these pages. I also wish that the classifications by the RVIA could be changed, but I honestly do not have a suggestion on how it could be changed. They selected the method of construction whether the converter stayed within the confines of a van body, or built on what is called a "cut-away", or was built on a chassis without a cab. I like to think of a B+ as a RV just slightly bigger than the Class B. If B+ was a classification, I would have a problem defining it.
If you would merely define B+ by length, some RV we now know as Class A's are only 25' long and those we now know as Class B's are 22' long. So the length would have to be in a very narrow range. Class B+ and Class C would be between 22' and 25'. That would not work too well.
To try to define a Class B+ as a RV without a bed over the cab, that would include most of what we now know as Class B's. And...what about the Conquest and Jayco units built on a medium duty truck cut-away? They make those as 39' without a bed over the cab, would that be a Class B+?
The quick answer is to take the definition of the Class C (built on a cut-away) and chop it up into small, medium, and large. WOW, that is what this forum has done - amazing.
I enjoy this discussion, in case you cannot tell. We are all here to learn from each other. Many have changed my mind when the subject is presented calmly. I would like to see a revised method to determine Class, but I have yet to see a great easily understood definition. ;)