55 ton RGN Lowboy Capacity

Usually the weight rating is for a concentrated load in 10' or 12' spacing. Your trailer will probably handle more for equipment. As to the laws in Alberta I can't help.

 

Looking at their website they rate all of the RG series trailers for the rated load in a 16' span. Considering they are a US based manufacturer and always have been they are not using metric tons for their ratings. Their 50 ton trailer is almost certainly going to be rated for 50T(100,000 lbs) in a 16' span.

You are mixing the US Short ton (1Ton = 2,000 lbs) with the Metric Long Ton (1Ton = 1,000KG = 2,200 lbs). 50 US Tons is about 43.3 Metric Tons. That's pretty much what you came up with for possible payload with your configuration.

All of the weights you provided are in metric tons but the trailer rating is marked in US tons.

 

that trailer is not going to accept a tandem jeep or a tandem booster most likely. The neck will be too short and the rear attachement for the booster will not be reinforced for a tandem booster. You may be able to run a single axle booster or a closed quad ( not legal AB).

without seeing the trailer, you may not have a long enough neck to even load the steer axle on your tri-drive - If it is a 120” swing clearance you probably won’t get more then 15k up front.

on GVW it will be 55 ton including the empty weight of the trailer - so if the trailer weighs 22k - 98k would be max legal weight without
“overloading”.

 

So if the tag says 55400 kg gvw that is 122,136 lbs. so 122,136 - minus take weight trailer = net load capacity

This is why they are referring to in their nomenclature as a 50 ton.

 

before you spend money building a flip neck - you should get in touch with Witzco and run it past them. Even a short neck extension produces a giant increase in stress on the neck. Just look at the difference in the neck for a 50 ton trailer and a 60 ton or larger.

since you said you are in Alberta - take trip to Accusteel near Edmonton and have them take a look

so if you go 15k on steer plus max trident at 60.600(27500 kg) - that is 136200 lbs

tridrive maybe 25000 lbs plus 22000 lbs trailer = 47000 lbs tare weight

Net 89,200 lbs

machine 42 metric tons = 92,594 lbs

you may not be able to scale that machine unless you equipment is much lighter than that 47 000 I guessed.

hope this helps you in your actual calculations.

 

Every trailer I've ever been around XXX ton means XXX ton on the deck. In whatever footprint it's rated at. Subtracting empty weight makes no sense.
Adding neck or boosters yah. Rating shrinks rapidly.