How to shorten a trailer?

   / How to shorten a trailer? #1  

stumpfield

Gold Member
Joined
Dec 7, 2005
Messages
455
Location
Sierra Foothills
Tractor
2005 MT265B
I bought a heavy duty trailer that's a little too long (24 feet). I want to cut 4 feet off. It this a crazy idea? or is it doable? What's the easiest way to do this? I'm thinking of making 2 cuts. Keeping the rear 18" so I can re-use the ramp attachment, tie down rings and other stuff. I never done this before. I can weld. Any comment before I start? What's the best tool to cut the main beam (8" C-channel about 1/4" thick)? I plan to use an abbrasive blade on a circular saw. Thanks.
 
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   / How to shorten a trailer? #2  
I think the first problem is that the axles are set according to the overall length. Mine on my 16 footer are a little rear of the middle of the trailer and yours are probally the same. After you cut the 4' off your axles will be to much to the rear and throw the tounge weight off. Before lighting the torch I would get some expert input from the other TBN'ers. You might end up with a serious sway problem which can throw your load off. Be careful. Do some research and I would find a 20' trailer somewhere and measure the length of the tongue and where the axles are in relation to the front and rear. Good Luck. I built my first trailer and it was a fun project but I did my homework first. You could move your axles by cutting the welds but be sure where they should go back on.
 
   / How to shorten a trailer? #3  
Unless you need the carring capacity you may thing about removing an axle.
If you remove the back axle your pin weight may not change one bit (empty trailer)
Having 15- 25% pin weight is ideal for towing a load.

I am half owner of a tripple axle dump trailer that looks like a wagon and it tows just fine...making tight turns is interesting.
Have fun with your project.
 
   / How to shorten a trailer?
  • Thread Starter
#4  
I'm thinking out loud here... It's is a 5th wheel trailer. It will have a lot of tongue weight anyway. My 1 ton truck can handle that. I don't know for sure but the axles look a llittle too far forward now. In addition, it's a triple axle and the weight should distribute more evenly on the frame. Moving the axles 1 foot or 2 doesn't have the same weight shifting effect as a single or double axle. This trailer current has a 19000 lbs GVWR. I don't really need that. I'll be hauler a 7000lbs max. Any sugguest of what type of joint for the weld? Can I just butt it together?

Should look like this... (wish it's that easy...cut & paste)
 
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   / How to shorten a trailer? #5  
I think your plan sounds very do-able.
But I do think you should also remove one axle. Making tight turns with a tri-axle is a PITA, and VERY hard on the tires.
 
   / How to shorten a trailer? #6  
Yea from your paste I would remove the ft. axle.
On your welds, I would atleast add a doubler on one or both sides of the frame so the weight will not be all on just the welded section..it will distribute it through out more of the frame.
 
   / How to shorten a trailer? #7  
If the trailer is new or nearly so, you might see if you can trade it for a shorter one that is more in lign with what you need. It would be a whole lot easire and maybe even cost effective.
 
   / How to shorten a trailer? #8  
I agree with wushaw based on your cut and paste to remove the front axle. As far as the weld goes you can butt weld the frame but also weld in some 1/4" thick plate across the two sections you weld together for additional strength.
 
   / How to shorten a trailer? #9  
Stumpfield, I'd cut at the beavertail & just behind the axles, then I'd weld flanges onto the ends of all cuts and make a spool piece that could be bolted in for original length when needed. The beavertail section would bolt onto the shortened frame or the lengthened frame. I'd use 6 or 8 3/4 " grade 8 bolts on each side. You could operate full length, shortened with or without a beavertail. MikeD74T
 
   / How to shorten a trailer? #10  
Add me to the remove an axle camp. much mo better
 
   / How to shorten a trailer? #11  
What a shame to hack up that trailer...

Geez, I would think in CA. there must be a ton of aspiring landscapers & equipment operators that hvae outgrown the trailers & equipment they use.

I would at least look into offering it up for trade on the trailer you are looking to create out of it...

16-20 ft. dbl axle trailers are much more common than what you've got there and could be easily outgrown by a busy business with multiple pieces of equipment to tote around.
 
   / How to shorten a trailer?
  • Thread Starter
#12  
After reading all the comments and advice from TBN members and from a trailer dealer. I decided to leave it the way it is. It's a shame to chop up a piece of nice equipment. Too many variables involve and it wasn't as simple as just cutting 4' off the rear. To do it right, it' involves lots of work and not worth the effort. Besides, I could trade for a shorter trailer plus some cash anytime. I have no idea that a 24' triple axle heavy duty 5th wheel flatbed trailer worth more than 3 times of a typical 18' double axle bumper pull utiltiy trailer. It would be unwise to chop it up. Thank you. I knew it was a silly idea:eek: Luckily I have access to this forum and be able to ask a dumb question like this. Here's picture of the trailer with the little dozer on it.
 
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   / How to shorten a trailer? #13  
Just wondering about your expertise and what it means to this trailer.
Anyone who would consider tackling a project of this magnatude must know what they are doing, and be proficent at it, or will find out the hard way that they made a major mistake. Considering using a skill saw with an abrasive blade to make these cuts is probably not something you want to try. You will wear out many, many blades, trying to do a job that should require a torch setup, or in todays advanced world, a plasma cutter. ( I prefer the torch)
I built a 27' trailer for a customer, to his spec's. He spec'd it out wrong. After completing the trailer, he asked me to modify it, which is when I started asking serious questions, and he started backpeddling due to the money and expense of the the required modifications.
I finally relented and added six foot to the rear of the trailer, knowing it would not handle right, and had him come over with his truck and pull it empty for a short drive. Unfortunately, it handled fine, so we went back and loaded up a reasonable load compared to what he wanted to haul. Made it almost half a mile before the darn thing started swaying, and he panicked, hitting the brakes. We stopped just shy of connecting trailer to truck in a jacknife situation. He never questioned my judgement again, and I always asked way too many questions to figure out just what he was trying to do in future arrangements.
You situation is the reverse of what he did. You are removing lenght from the rear section of the trailer, behind the axles. This should improve the handling caracteristics' of the trailer, but will add considerable more weight to the tongue, due to not being able to center the weight on the axles. It also will not help in the manuevering of the trailer, since the wheelbase will not be changed, which is what you probably are after. Removal of the front axle is also not going to help that. Removal of the rear axle will shorten your wheelbase, but will decrease the capacity of the trailer.
What you are doing basically is making an arrangement similar to a boat trailer, with the axles nearer the rear of the trailer. Nothing wroing with that, but there is a reason trailers are built the way they are. Most of the weight in a boat is on the rear of the boat,which centers it on the rearward placed axles. Most items hauled on a flatbed trailer aren't like that,in fact most are quite the opposite.
Bottom line, yes this conversion is possible, but unless I miss my guess, your going to need some serious help with it. Running welds vertical and overhead that will be under extreme stress aren't for the average homeowner with a mig gun, and cutting the trailer with a skill saw will soon tell you that your in over your head.
I hope I have added some information to you post without insulting your intelligence. If you are qualified to handle this type of a modification, then you probably already know the answer to your original question.
Respectfully,
David from jax
 
   / How to shorten a trailer? #14  
I posted the last post before I realized you had already decided to leave well enough alone. Good decision!
I started to delete my last post, but realized somebody else might be considering the same thing, so I left it there for future reference.
David from jax
 
   / How to shorten a trailer? #15  
browns40 said:
What a shame to hack up that trailer...

Geez, I would think in CA. there must be a ton of aspiring landscapers & equipment operators that hvae outgrown the trailers & equipment they use.

I would at least look into offering it up for trade on the trailer you are looking to create out of it...

16-20 ft. dbl axle trailers are much more common than what you've got there and could be easily outgrown by a busy business with multiple pieces of equipment to tote around.

I think you did the right thing not cutting it. If I were you, I would just opt for the longer tractor option
 

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