Tractor Trailer Match 3 axle rgn

Sure you can do 139k in Canada on 8 axles, but that is only going to confuse the OP. He is not going to be able to scale 139k on 6 axles in the us on most places

 

Most places only allow you to scale 60 on a tridem, doesn't matter if your trailer is rated for more...thats all you get

Tandems 40-46k. Steer up to 20k IF made for it. No way you'd scale 80k. 70k if loaded just right you could.

 

No, he’ll be on permits way before we would on the same axle count. He won’t even be able to load the trailer to rating without permits. The point I was making was a big fat tractor isn’t going to help in that respect. There’s 3 tractors here that can max out the 35ton’s without permits.

 

I pulled a 9 axle grossing up to 175k in '96 and '97 with my IHC9200 430/470 and a rto14618 and 3.90 in super 40's with a standard frame.
I ran that tractor 2.4 million miles and put in a reman 500 Detroit at 1.6 million. the only major repairs other than the motor was a clutch piled up 1.3 million was a front diff locked up south of Amarillo at 1.2 million miles.
I also pulled a triaxle RGN grossing up to 133K(on winter weights) for 2 years.
Parked it in 2010 and sold it in 2011.

 

Your not going to be able to permit over your tire ratings, Georgia will give you 100k on five, but you can’t do it legally because of tire and axle ratings.
This guide in not 100% accurate, but close.
State oversize permits & escorts information and requirements

 

why?
20k steer with 445s
46k rears with 315s
34k trailer regular axles and common tires

 

I don't want to create a new thread to ask this question.

But it is somewhat germane.

I'm supposed to be getting a 2+1. So far I'm pretty shure I'm keeping ahold of the 3 axel truck.

Pretty shure the +1 is a stinger style booster. Unless that changed.

Anyway my question is for those of you who have possibly had a tri or something similar behind a three axle truck. How far back of center did you typically load?

Am I looking at running things all the way up against the back of the well or a little more forward than that?

I mean I'm sure I'll sort it out eventually but I am curious if someone in here might have some advice on how to get that to balance out.

 

• This is my empty weights, full tanks 3 axle T680 with a 3 axle RGN
  
  
• 

 

There are still almost too many variables to give a constructive answer, but I'll share what works with ours, which is:

48 ft. Aspen 50 ton lowboy with 21' well. Tri axle with 5' axle spacing.
Empty weight with 3 axle 379, day cab is 38,500ish. We typically place load about 1' back from center of deck.

Same trailer with 4 axle 378 day cab, light weight 41,000, and we could put center of gravity ahead of center of deck. Mind you our annual permit was liberal enough with a 50,000 lb. load that we had a bunch of tolerance. With the 4 axle tractor we can run legal axle weights at 91k, we would be slightly over on the 3 axle.

The center of gravity (fore/aft) is seldom the center of a machine though, at least on earthmoving equipment. A loader will be butt heavy, as will a track hoe. A dozer should be pretty centered.

 

I don’t know how your permits will work or if you will be running overweight permits but I would guess you will.
I do know that most of my moves with a 3 axle truck and 53’ 3 axle trailer with a 26’ well. I can be pretty sloppy on loads less than 65k
My empty weight is approximately 39500
I typically load trackhoes backwards with the rod end of the bucket cylinder near the end of the well on a roughly 60k machine I am approximately 15k steer 42k drives and 43k on the trailer
Which is plenty good on my permit 20k steer 48k drives 60k trailer. Long reach hoes can be a little tricky because they usually have a huge counter weight I load them with backwards with the tracks about at the end of the well. Most of the dozers I move are around 45-60k and will scale fine anywhere in the well
I try to keep my drives as close to or above the weight of the trailer for mobility especially in the winter or off road delivery.