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goose neck trailer towing tongue weight question

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4.4K views 14 replies 6 participants last post by  PJDiesel  
#1 ·
technical/hypothetical question:

Assume you are towing a gooseneck/5th wheel trailer in the 15K lb range with a 1 ton truck. I have read recommended tongue weight is 20-25% of the total trailer/cargo weight. Assume you are below the 20-25% tongue weight (3000-3750lbs)....say in the 10-15% (1500-2250lbs ) range. How will this effect the handling of the tow vehicle?

I'm assuming the percentage recommendation is higher on a gooseneck trailer simply because of the additional load capacity offered by centering the tongue load over the rear axle, verses cantilevering the load behind the axle ( bumper hitch ). I understand how a light or negative tongue load can effect a bumper pull trailer/tow vehicle combo. I'm sure this can also happen with a gooseneck. I'm just curious how much load you MUST have on the tow vehicle to be safe.
 
#5 ·
I've always heard closer to 15 is the ideal percentage for a GN / 5'er.

I would say if you were LESS than 10% there could be issues.

Assuming we are talking about 15K, 2250 LBS tongue is a decent clip. I wouldn't worry about any negative weight (bounce/lift) issues with that weight on.
 
#8 · (Edited)
Thanks for the info..................

I can't discuss the details as it is work related. I will say the trailer I am discussing is similar to a typical gooseneck flatbed, but the cargo center of gravity is always fixed in the same position...that is about as specific as I can get!

The "cargo" can vary in weight...from a couple thousand pounds up to 16,000 per the mfg of the cargo, depending on the size of what is being hauled. Like I said, the cargo center of gravity will always be located in the same position in relation to the axles, which in this case is forward of the front tandem axle. I am considering using two 8k torsion axles. Yes, I realize this isn't sufficient for the potential 16K load. Our first run will be 16K GVW, not 16K load capacity. Trailer alone may weight up to 7k

Keeping in mind, the CG of the cargo location, always being in the same place, slightly forward of the axles, it makes sense there will never be a negative tongue load.

The calculations I have done show 11% tongue load assuming we are near the 16K max GVW. Far short of the 20-25% suggestions I have seen online.

11% of 16K=1760lbs

This may or may NOT be pulled with a 1 ton truck...probably a medium duty chassis....f450-f550...etc.

and it is LONG....the loadbed will be about 36' long. The trailer/tractor length limit is 65' if I am not mistaken. That should allow for up to 25' of tow vehicle i believe.

And no, I can't shift the weight forward to add load to the tongue. It has to be where it is in relation to the axles.
 
#11 ·
Gooseneck is just a ball mounted in the middle of the bed, the 5th wheel is that draw tite hitch shown above with a king pin lock like the tractor trailers use in a commercial setting.
You wont see any problems in the truck with the load shifted back a little and the tongue weight a little lighter. Probably make it an easier more balanced load but the trailer axles are going to go through more hell than they might be rated for so you have to take that into account.
a trailer that weighs 7K pounds is really alot of weight. What are you pulling the space shuttle?
J
 
#13 ·
If I were you I'd get a tri-axle gooseneck SHIP4BRAINS.

the weight you mention of 16,000GWV is really no weight at all for a 1 Ton. Hell I've seen 3/4 tons pull that. You will notice will a tri-axle the weight is distributed MUCH beter, And you have much less tongue weight on your truck making handling and control much easier. You need to remeber. a 36ft x8.5ft gooseneck trailer will weight its self between 7500-to9000LBS. if you get a trailer like this equiped with only tandem 7000lbs axle( I dont think 8000lbs exisits) you will only be allowed to pull 5000-6500lbs of cargo TOPS! not to mention your weight distribution will be terrible beacuase the axles would probablly be FAR back... Do yourself a favour...get a tri-axle :)
 
#15 ·
Jayl13 said:
Was this from MR Mom the movie the chain saw scene when they are talking about power requirements for something in the house and Keaton does not know but he is playing it off like he does to Martin Mull? That movie is a classic.
Actually I have never seen the movie before LOLOLOL


Schooner tuna LMFAO
An absolute classic.

Anyone who appreciates that movie should check out a movie called "The Burbs"

Another classic.