Gotta ? about bridge laws
 

If i had a 34ft trailer with a lift axle can i still gross 80,000lbs?? Whats the shortest trailer i can have with a lift axle and still gross 80k?? Thanks

Federal Bridge Gross Weight Formula - Wikipedia, the free encyclopedia
This offers a table towards the bottom of the page. I hope that helps out. Wait, I thought you sold the dump truck... Are you up to more shenanigans? Or is this for an addition to the crap-hauler?

I looked at that table and didnt really understand it. LMAO.

It will be a tank trailer. Reason im asking is i might be bale to do alot of fast food places with 1,000 gallons grease traps. If i can get a short trailer i might think about it. If not i can always go buy a tri/axle stright truck for the job. Just thinking outloud thats all. I might not even get the job. We will see.

You question can't be answered as you have given insufficient information.

A complete schematic with axle spacings is required as both inner and outer bridge measurements are important.

You would need 43 feet from 1 to 6 to gross 80K.

Why 6 axles?

There must be a minimum inner bridge measurement also.

If it's only 5 axles it's 51 feet from 1 to 5.

For some reason when I was thinking lift axle, was all the end dump trailers I've seen runing around and they are triple end dumps. Tank trailer kinda went in one ear and out the other.