tag to goose neck conversion

[Mjl1226]

Looking for input I have a 21ft Tag trailer that I want to convert to a gooseneck the frame is double stacked 2"x4" 1/4 tube steel. I was thinking of using 2"x6" C chanle for the goose neck any thoughts on the size and form of the steel (C chanle, i beam, tube steal). And befor everyone starts with the just buy a goose neck I will have to shell out quite a bit more for a new trailer than what it would cost to modify this one.

 

[farm boy00]

Looking for input I have a 21ft Tag trailer that I want to convert to a gooseneck the frame is double stacked 2"x4" 1/4 tube steel. I was thinking of using 2"x6" C chanle for the goose neck any thoughts on the size and form of the steel (C chanle, i beam, tube steal). And befor everyone starts with the just buy a goose neck I will have to shell out quite a bit more for a new trailer than what it would cost to modify this one.

I like your thoughts. My father helped out a friend a good few years back (5-10) and took a construction trailer after it was bought found out it was stolen so they converted it into a gooseneck. I think they used c channel but not sure. It fooled me As a little kid

 

[b7610hsd]

On this Link it looks like "C" channel is used Trailer Blueprints — 26ft. x 8ft. 6in. Flat Deck Auto Hauler | Trailer Blueprints| Northern Tool + Equipment

 

[dieselbeef]

i did it..used 8'' c channel..its alot harder than ya think

 

[BHD]

I would most likely use the same material that the frame is made out of, but with out seeing the trailer would not recommend any course of action,

when my son re did my trailer, (I do not have a fifth wheel or ball), the frame on the trailer was either 10 or 12 inch channel and he used the same as what the frame was, and gusseted the corners, he also built a dove tail and ramps on it, and added a third axel on it, (guess what I no longer have a trailer).

 

[ishiboo]

Use lots of gussets and splice plates everywhere you can put one.

 

[George2615]

I remember reading here that another member converted a bumper pull to gooseneck. He made it in a way that did not alter the BP and the goose neck part could be easily removed. I tried searching for the thread but search isn't working for me on my work computer. It was a bolt on type arrangement.

 

[Mjl1226]

I don't have any pictures of it that im able to upload at the moment but the frame is 2X4 X1/4" double stacked fully welded like a figure 8. I was just thinking about extending the length and keeping it a tag. either way it will be come longer and wider by the time I'm done and yes gussetts every where.

 

[Shield Arc]

I've done this a couple times. They are really easy to build.

 

[tcartwri]

I've done this a couple times. They are really easy to build.

Very nice work, but that is a heck of a lot of steel.... Our 12t goose was nowhere near that heavily built.

 

[Shield Arc]

Very nice work, but that is a heck of a lot of steel.... Our 12t goose was nowhere near that heavily built.

First one I did was for a friend. Used smaller steel.

 

[busy dad]

We used to build a tri axle 18,000 pound trailer . It's neck was made with 8" I beam to match the frame .. It had a simple design and used several gussets and doubler plates where required .

 

[franklin2]

I know this is a rather boring way to figure out what you need, but it sure does work. Go to a place that sells trailers and measure what they have. You can pretend you are looking to buy if that makes them feel better about you nosing around and measuring things. Nothing like seeing how the store bought trailers are made with all that engineering already done.

 

[Mjl1226]

The only problem with this is I have called around and the closest one I found is an hour away. Not worth the drive. I just broke down and bought trailer plans for the 26ft gooseneck flatbed.

QUOTE=franklin2;4157231]I know this is a rather boring way to figure out what you need, but it sure does work. Go to a place that sells trailers and measure what they have. You can pretend you are looking to buy if that makes them feel better about you nosing around and measuring things. Nothing like seeing how the store bought trailers are made with all that engineering already done.[/QUOTE]

 

[franklin2]

The only problem with this is I have called around and the closest one I found is an hour away. Not worth the drive. I just broke down and bought trailer plans for the 26ft gooseneck flatbed.

QUOTE=franklin2;4157231]I know this is a rather boring way to figure out what you need, but it sure does work. Go to a place that sells trailers and measure what they have. You can pretend you are looking to buy if that makes them feel better about you nosing around and measuring things. Nothing like seeing how the store bought trailers are made with all that engineering already done.

[/QUOTE]

Too bad. Maybe some guys on here with the gooseneck style can chime in with their experiences using one. If I were converting my trailer, the first thing I would wonder about is clearance over the bed of the truck. How high should you make the frontend go up and over the back of the bed and extend down into the truck?

Do different makes of trucks have different distances from the rear bumper to the center of the rear axle? I wonder how much you should allow for that?

 

[Mjl1226]

I have all of the measurement concerning the gooseneck. I got those from a friends trailer. The biggest difference is his is a custom open center hauler. Custom made for boat transport. The thing is about 48 ft long and build like a brick outhouse. My trailer has have the capacity of his so as for the size of the steel I'm still up in the air at the moment. As for the measurements I m good.

 

[farm boy00]

I have all of the measurement concerning the gooseneck. I got those from a friends trailer. The biggest difference is his is a custom open center hauler. Custom made for boat transport. The thing is about 48 ft long and build like a brick outhouse. My trailer has have the capacity of his so as for the size of the steel I'm still up in the air at the moment. As for the measurements I m good.

What are you hauling. If it's something hive like a backhoe or a Dozer i don't think your frame is big enough

 

[Mjl1226]

It's main purpose is a heavy uniform load of hay. Approximately 300-350 bales at a time.
According to the original manufacturer this trailer the way that it sits is rated for a total combined weight of 21000 pounds. And the frame itself has a max load of 24000 pounds.

 

[Shield Arc]

the frame itself has a max load of 24000 pounds.

After I built my gooseneck adapter, an engineer friend ran the numbers. He said it was good for 30,000-pounds. I got the beams off Craigs list. They were demoed out of Childrens Hospital in Seattle. They must be an M-shape, but I can't find there size in any of my books.

12-inches tall.
Flange width is 4 1/8-inches.
Flanges thickness is 1/4-inch.
Web thickness is 3/16-inch.

 

[vince2]

Wondering how much weight is added by this GN conversion.