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Trailer length

Doubles like in the first pic are legal in a lot of states and you see it all the time out here. I did see someone towing a 26-28' fifth wheel trailer and flat towing a CJ7 behind that when I left Moab in April. I don't think I would ever do that.
 
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DOT doesn't give a rat's ass what your truck can pull or what it is rated for. All they're going to do is check your hitching equipment, check the truck for brakes, lights, etc., and send you down the road.

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Yes they do care how much the truck weighs and what it is rated for. The hotshotters have dot and icc numbers and are required to enter all scalehouses, and if they are overweight do you think that the dot will pass up an opportunity that easy to make $800 to $3000 for an overweight fine?

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There is absolutely nothing safe about overloading anything to that margin. I'm sure some of you don't even realize just how unsafe that is.


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The truck that I safely drive everyday is rated for 80,000 lbs GVWR. With the proper trailer and permits the same truck can have a 160,000 lb GVWR, that's 200% more. I have seen 80,000 lb trucks haul over 200,000 lbs, I wonder how they can do that if the truck manufacturer says 80,000 lbs? I guess the "properly equipped" thing has something to do with it.

Possibly manufacturer GVWR ratings are conservitive for liabilty reasons and that they are available to anyone, regardless of driver's license class. The GVWR are also for stock trucks, with add on equipment and the proper trailer these #'s can be increased.

I drive 2,500 miles every week and I see about 2 or 3 accidents every day. Never have I seen a hotshotter hauling 3 or 4 cars involved in an accident, EVER! If it were so unsafe I would think that they would be having wrecks all of the time /forums/images/graemlins/dunno.gif Maybe we need to improve the safety of the cars that are usually the focus of the wrecks...

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Grow up and get past the tone that you don't seem to like about my posts, the intentions of it are good.

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I know that your intentions are good, and people who help others as you do are valuable to a forum. You seem to present your opinion as fact and think it is the law. If something is a fact, present it as a fact, otherwise it is nothing more that an opinion. /forums/images/graemlins/thumb.gif
 
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Doubles like in the first pic are legal in a lot of states and you see it all the time out here. I did see someone towing a 26-28' fifth wheel trailer and flat towing a CJ7 behind that when I left Moab in April. I don't think I would ever do that.

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Yes they are legal in some states... I guess I just dont leave VA much. /forums/images/graemlins/grin.gif And in Canada from what I hear, they are legal everywhere.

John
 
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I really didnt say what my tow rig would be did I? I plan on using a 2 ton or larger truck for hauling that big of a load but want to keep the trailer small enough to pull behind a 1 ton dually with just a camper and trail rig on it. If I put 2 trucks that weigh in around 6-7K and the trailer weighed 3-4K. Best case would be about 15K worst case about 18K. As long as it is planned out properly it can be done safely.

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Just to give you a few notes:
I am in the process of shopping for a trailer myself, a gooseneck 28' and the ones I found where rated at 14k and weighed 5200lbs, I can't imagine a 35' being less.
On the other hand, I had a friend that had a triple axle 45' trailer with 4 jeeps on fullsize axles and 44"tires and all the trimmings to go with those setups and pulled it with a souped up Dodge 3500 with the cummins and all the BANKS goodies there are.
This thing pulled it like it wasn't there.
The driver was also good, he handled it in real tight spots with no sweat, I am trying to stay under 30' for ease of driving.
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From the GM website, a 2500HD truck with DMax/Allison is rated to tow a 15,500 lb. trailer (remember, single wheel, 3/4 ton truck, not even a Dooley). You are right about two average pickup trucks weighing 6000 lbs./each, but we all have seen 4 wheel drive 1/2 ton and 3/4 ton trucks shown to weigh much less. A gooseneck trailer long enough to to fit these two trucks will not weigh 7000 lbs. as you described, but more like 4000 lbs. (or less).

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Yes, a 3/4 ton may be rated to pull 15,000 lbs, but if you read into it further, it's really not, and here's why.

The GVWR of that truck is likely to be 9,200 lbs. Loaded with fuel, the hitch it self, passengers tools, etc., especially if that truck is a crew cab, it is going to weigh AT LEAST 7,000 lbs. 9,200 - 7,000 = 2,200 lbs left over for pin weight.

My 33' 5er has an EMPTY pin weight of 1,800 lbs. The reality of it is that no matter what you do, you're going to bust the GVWR before you get to that 15,000 lbs. In fact, you'd be lucky to be pulling a 10,000 lb trailer with 2,200 lbs of pin weight or less.

That is saying that the truck only weighs 7,000. If it is a crewcab 4wd, I'd bet it will weigh even more. More like 7,500 or so. That is going to give you even less of the GVWR available for pin weight, and if that truck weighed 7,500 lbs and had my 33' 5er hitched to it, it would be overloaded pulling an empty trailer that only weighs 8,500 lbs.

So, you never busted the, "gross trailer weight rating" that the factory gives you, but you busted the GVWR. Moral of the story? You're nowhere near the rating of the truck's total pulling ability but you're overloaded.

We have also not considered the rear axle's weight rating or the rating of the tires in the rear of the vehicle which are likely to allow even less weight available to pull safely within the limits set forth by their manufacturer which are assuming that you're at the max pressure as well.

4,000 lbs or less is complete and utter nonsense. If my 20' trailer weighs 2,500 lbs, you'd be a fool to believe that a 30+ footer with axles that have dual tires and that long gooseneck hitch hits the scales at less than 5,000 lbs. No way you're going to get a steel 30+ foot gooseneck rated at 20,000 lb GVWR that is going to be 4,000 lbs.

Engineers design safety factors in to vehicles for a reason. This is not intended to be broken. Sure, the vehicle isn't going to explode if it's one pound over weight, but that safety factor is not there so joe blow can overload his truck sucessfully. It is there to ensure that in ANY condition, your truck and trailer combination will be safe at its full rated load.

I will not argue as to whether the truck will do it or not. That is unquestionable. I have no doubts that I could put 30,000 lbs or more behind my C30 SRW and pull at highway speed. The truck will do it, but that doesn't make it right, safe, or legal.

So, since you wanted facts only, I'll recap:

1. You will be hard pressed to load a single wheel truck to its maxiumum towing capacity without overloading it somewhere else, such as rear tires and rear axle weight rating. Realistically this huge gooseneck you're talking about with a 5,000+ lb truck right above the bed or slightly behind is going to have at least a 4,000 lb pin weight which no matter what you do with a single wheel truck, it's going to be overloaded.

"Know it all" or not, it seems that some of you guys who understand some very complicated things about four wheeling haven't read far enough into tow ratings to realize that the weight rating given by the manufacturer, or GCWR, isn't the end all to this discussion. There are a number of factors that play into whether a truck is overloaded or not that you're all missing.

Without actual numbers of a loaded vehicle and how much weight is on each axle it's hard to call whether a vehicle is overloaded or not. A single wheel truck with a trailer 30' or longer, especially a gooseneck or 5th wheel, is most likely overloaded though. A 35' trailer behind a single wheel truck is most definitely overloaded.

This is something that we really need to have a discussion about on this board, anyway. It's long overdue.
 
Tim as long as the trailer axles are placed properly you can make it work. As long as the weight on each axle does not exceed its rating for both truck and trailer. All you have to do is position the trailer axles far enough forward that the hitch doesnt over load the truck (and still keeping within the tow rigs GCVWR and trailer axle ratings/load rating). Semi's have sliding axles for this purpose and some equipment trailers do as well. Yet in the end not much of this has to do with what I have planned anyway /forums/images/graemlins/histerical.gif

I don't have a bill of material in front of me to calculate the weight of a trailer but as a rough estimate for a 20K trailer (material sizes taken from Over Bilt Trailer Co.:

12" I beam main frame (19#/ft) x 36' x qty 2 = 1368#
3" channel iron crossmembers on 24" centers (5#/ft) x 9' x qty 18 = 810#
5" channel iron sides (6.7#/ft) x 36' x qty 2 = 482#
3/8" x 3" flatbar running length of trailer for tie down (3.825#/ft) x 36' x qty 2 = 275#
wood deck 2" x x 9' wide x 36' long (0.02456#/cu in) = 2292#
(or optional 1/4" diamond plate decking at 11.26#/sq ft = 3650#)
Guessing on Axles 250# x 2 = 500#
Guessing on Tires w/wheel 100# x 8 = 800#
Guessing on Gooseneck hitch = 500#

I'm getting a hair over 7000# as a rough estimate. 3-4K was just a wild guess and I didnt have any info to back it up.
Add in a couple 5800# trucks and you are easlily up to 18.6K. I would not want to tow that with a single wheel truck, 3/4 ton or 1 ton. But I would with a properly equipt dually tow rig.

A new Chevy 3500 with a duramax is rated for 11.4K GVWR with a 15.5K max trailer rating. If you keep the weight on the g/n hitch down to 20% (considered average) of the 15.5K total trailer weight that is only 3.1K payload directly above the rear axle the truck would only be loaded around 10.5K.
2004 Chevrolet Truck Weight ratings

Edit: looks like the 3500 weighs in around 6200# but it would be safe to say the tow rig would come close to 7000 by the time you add in extra tools and misc stuff. But the trucks being towed would most likely be stripped down to just a truck and be closer to the 6200# mark if they are both 1 tons, probably lighter if they are 1/2 or 3/4 ton. My '79 K20 only weights a little over 5800# with me and all my tools in it.
 
You can make it work MAYBE with a dually. With a single wheel truck I'd say 99% of them pulling more than one vehicle behind them on a large trailer are overloaded.

Positioning the vehicles on the trailer for optimum pin weight is not practical unless your trailer is quite a bit larger than it needs to be for two rigs.

11,400 lb GVWR is certainly a step in the right direction, but you'll have to be quite careful, especially if your trailer is 6,000 lbs or more without trucks on it.
 
In summary I'm seing a 3000# overload using a 36' trailer on a 1 ton dually with 11.4K GVWR. With some extra design work I think I can loose 1000# on the weight of the trailer with a few tricks I know. One being stronger but lighter frame rails (just not common on commercially built trailers due to time it takes to make the beams). Decking could also be solid runners with open grating down the center to save a little weight.

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<font color="red"> custom </font> 12" I beam main frame (made from W8 x 13#/ft) x 36' x qty 2 = 936#
3" channel iron crossmembers on 24" centers (5#/ft) x 9' x qty 18 = 810#
5" channel iron sides (6.7#/ft) x 36' x qty 2 = 482#
3/8" x 3" flatbar running length of trailer for tie down (3.825#/ft) x 36' x qty 2 = 275#
wood deck runners 2" x x 3' wide x 36' long (0.02456#/cu in) x qty 2 = 1528#
expanded metal center 3' wide x 36' long (4#/sq ft) = 432#
7K Axles 175# x 3 = 525# (found the shipping weight of 200# each for axle, hubs and springs on a 6K axle Here)
Guessing on Tires w/wheel 75# x 6 = 450#
Guessing on Gooseneck hitch = 500#

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I'm now down close to 6000# in material to build the trailer.
 
It is easier to slide the axles on trailers that are equipt that way. But I wouldnt be towing a 36' trailer loaded down with 2 full size trucks with a 1 ton anyway. I'm planning on a 2 ton or larger (16K GVWR) truck for a tow rig. That should be large enough for a 48" sleeper (or possibly small camper) plus trailer and vehicles in tow. /forums/images/graemlins/thumb.gif
 
I only have enough engine to haul around my fat ass, which approches my GVWR. /forums/images/graemlins/smile.gif /forums/images/graemlins/rotfl.gif
 
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I only have enough engine to haul around my fat ass, which approches my GVWR. /forums/images/graemlins/smile.gif /forums/images/graemlins/rotfl.gif

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/forums/images/graemlins/histerical.gif /forums/images/graemlins/histerical.gif Think about all those times you see 3-4 people tipping the scales over 250-300# riding around in a GEO Metro /forums/images/graemlins/yikes.gif Gotta be an overloaded little car /forums/images/graemlins/whistling.gif
 
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Think about all those times you see 3-4 people tipping the scales over 250-300# riding around in a GEO Metro Gotta be an overloaded little car

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If you see this in public again, get Timmy on the case. That can't be safe! /forums/images/graemlins/rotfl.gif
 
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Think about all those times you see 3-4 people tipping the scales over 250-300# riding around in a GEO Metro Gotta be an overloaded little car

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If you see this in public again, get Timmy on the case. That can't be safe! /forums/images/graemlins/rotfl.gif

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Yeah, losing control of 3,000 lbs worth of Geo is really comparable to overloading a pickup truck by 40% and then taking that 20+k lbs down the road. /forums/images/graemlins/rolleyes.gif
 
Okay here goes. I'm gonna stir the pot a little. About 1/3 of the 20' trailer is axles, the hitch/gooseneck, tires and wires. Now you are gonna put similar stuff into the 30' one, and an extra axle (now 3) into a 40' one.

As for the GVW issue. It is limited mostly by two factors, liabilities and standard auto insurance requirements. Insurance companies as well as auto makers don't like the idea of just anybody using (even when perfectly equipped) a 30,000lb set up on the road. Auto makers won't sell a whole lot if you can't insure the rig for a normal fee. So they nock the GVW down to an agreed upon limit. Sure the truck will probably hual a lot more but it will require more driver awareness (as well as time) to do so legaly. Why do you think a ryder truck is only allowed 19,000lb on a full cab-chassis truck (read 19.5's heavy duty set up). It is the idea of comercial sales overkill.

To end even a mini van with 4 adults, 2 ice chests, chairs, and a wet tent trailer is overloaded. Not to mention that my K5 is rated for some amount of trailer weight but I know very well it won't even come close to handling it anymore.
 
Tim, STFU!
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Two trucks @ 6,000 lbs + a 7,000 lb trailer = 19,000 + 7,000 lb truck to pull them = 26,000 lbs.

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my STOCK 04.5 dodge 3500 SRW is rated a CGVRW of 26,000.

a one ton truck of the newer age is MORE than capable to pull 26k.

to the origonal poster,
as said by therobzilla come hang with me any time.
Grant
 

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