3 axle 40 ft trailer?

In which region? Tridem loads vary from state to state and differ provincially in Canada. They are also dependent on the size of the spread (i.e. an 8 ft spread tridem is only 41,500 in a state like MN or IL, but 43,500 for a 10 foot spread).

 

He said New York.

 

https://www.dot.ny.gov/nypermits/faqs

New York doesn't make this easy to understand, lol.

I think it says 36,000 lbs maximum for any two consecutive axles and you are likely looking at 38,000 maximum on a tri with a 12' spread.

Manitoba is 50,700 on most common tridem spreads. Ontario is 52,900 on most common spreads. If you always load to Manitoba weights (gross is the same) you should have no issues.

I'm not up on my specific bridge laws, so I don't know what the shorter trailer might do to change these things, but it won't be by much.

 

Are we talking about special hauling permits or just legal loads?

 

In New York? I have no clue, lol. I just checked their DOT website. Couldn't make heads or tails of the info there. Usually they are pretty straightforward. They remind me of Ontario and Michigan, gotta be special.

 

I think l know the company too. Ny has very complicated weight rules when it comes to permits. Makes ont and michigan look easy. Probably permitted to 107. They take truck axle weight into consideration too. Meaning you might have to have actual 46000 lbs rear ends to get full weight.

 

6 axles is good for 105k/107k. 7 axles gets you 117k/120k depending on region. Just look at the dump trailers/walking floors that stay in state. NYS doesn't care about the commodity.