Double frame

Depends. How thick and how tall is the rail?

 

It’s not so much the “doubling” the frame. It’s just more so of how much weight are you putting on the truck directly.

also, how thick is the current frame?


I think you’ll be just fine as long as you are not exceeding your axel/tire/suspension/drive line/transmission weight/torque ratings.

 

Do you mean lowboy, or RGN? On most of either of them, especially with a flip axle, most of the weight is on the trailer axles. I have pulled RGN trailers fairly successfully with a Cascadia. The tight turning circle is kind of a bonus on narrow lease roads. The only drawback is that very few Cascadias have locking diffs, which makes mud a bit of a challenge. It's not perfect, but rarely is anything perfect in trucking.

 

I've seen regular frames crack under normal circumstances, but I've never seen a double frame crack. Happened to my Western Star just pulling RR pigs. With the possibility of that much weight, it should be double at least under the 5th wheel. While it's true, most weight will be on the back, resonance will go to the front. I'd get a double frame.

 

[QUOTE="[/QUOTE]
This advice is concerning any load on todays tractors.
Canadians regularly pull weights of 140,000# (8 axles) with standard tractors with tractors with a 240 or less wheelbase.
As long as you are not exceeding rated weights on any axle on the tractor (13200#/14600# steers) (40,000#to 46,000# drives) and do not jerk the frame sideways under load you are perfectly safe.
You should be safe to exceed the rated drive weights by 10% but do not exceed steer axle rating as that can overload the frame-rails between the drive suspension and the steering suspension.

 

You will be fine unless you have a super light speced unit…100k isn’t really that much

 

I wouldn't worry about it at 100k. I've done that with a single axle T300.

 

A standard tractor in Canada has 8 axles?!?

 

Super b combination