Gentlemen, I dare enter the fray with an experience of my own, I am a small manufacturing company that builds specialty oilfield equipment, we produce a service trailer that is 3 axle and 27,600lb gvw. Federal DOT clearly states that axle centers must be 40" or greater. The law subsection was created 40 years ago before the serious advent of tag trailers and low profile tires, subsequently you simply cannot purchase springs and hangers that will produce anything greater than 38" centers on 8k axles. That being said, we have passed inspection in 47 states. #48 North Dakota has ruled our unit has 1 axle and does not recognize the low profile tires and goes by wheel width resulting in a gvw of something like 17,500, The North Dakota Highway Patrol ruled it 1 axle, 6 tires at 20,000lb gvw. Last week we shipped a replacement unit with custom equalizers to obtain a 40. 5" axle center to comply literally with the law. In my conversation with North Dakota DOT they also ruled my horse trailer, dump trailer and car trailer as 1 axle and would issue a ticket for overweight based on that assertation.
I do not have a point other than, I have seen directly that units within the same government body cannot rule the same, at the same time, same place and same unit in the same parking lot!
I also appreciate reading both of your posts and find you both thoughtful and thought provoking,
good day,
Perry
In your experience with ND DOT do you know if they enforce the same regulations on RV trailers?
I've pulled lots of RV trailers through ND and have gone through at least one DOT inspection in ND but never ran into a problem. RV trailer axles are not on 40" centers either.