(800) 853-2651
SHOP NOW

Building a 5th wheel trailer

Ultradog MN

Ultradog MN

Well-known Member
Location
Twin Cities
A buddy of mine is building a 5th wheel trailer to replace his pull behind.
The deck will be 22' including the beaver tail.
Overall length from 5th wheel pin will be 28'.
The question we have is where to mount the axles?
Is there a formula out there giving the best ratios for length vs axle placement?
If it matters they are 12K tandem axles with dual 16" wheels.
He works in a giant machine/fabricating shop so the building part is easy. We just need to know where to place the axles.
Thanks for any and all help.
 
I'd center (pivot point) the tandem axles about 2/3 of the way back from the front of the deck. btdt.......with gooseneck.
 
my dual tandems are in the back just like a regular OTR trailer for what I haul 2/3 back would not work. So I would say that he needs to know how he is going to use it.
 
my dual tandems are in the back just like a regular OTR trailer for what I haul 2/3 back would not work. So I would say that he needs to know how he is going to use it.
 
For placement of the trailer axles you really need to know the common load weight/cubes and what kind of truck he is using.

Light trucks like single tire pickups usually use the 2/3 formula because it gives you room to put some of the load behind the trailer axle. This allows the trailer to carry more of the weight because the truck can hot handle the tongue load.
With a larger truck you will want the axle farther to the back of the trailer to give you room in front of the trailer axle to apply weight on the drive axles of the truck.
 
6ft neck is too short, all the newer stuff is 8ft.

With a 5ft beavertail, that only leaves 17ft of deck space, way too short in my opinion. Want more like 22-25 feet of deck to center wieght better.

If you go with a shorter beavertail than 5ft, even 4ft, becomes too steep to comfortable load, even if you do a pierced beam design. 4 ft sounds like enough, but it isn't when you are 34" off the ground

Those are heavy axles for that short a trailer, if you use the 2/3 rule, you will lift the back of the pickup off the ground if you load anything heavy up the ramps
 
You must log in or register to reply here.

Similar threads

N
JD 300 loader on a 2030
Replies
13
Views
678
Tx Jim
Tx Jim
B
Case Nutty 1660 /// Lowboy trailer
Replies
4
Views
507
Bruce(OR)
B
D
Trailer concerns
Replies
8
Views
2K
DoubleO7
DoubleO7
A
OT Gooseneck trailer
Replies
7
Views
525
ss55
S
S
Trailer
2 3
Replies
40
Views
2K
sald
S
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top