Good Sam Club Open Roads Forum: why aren't the frame rails of TT set evenly from the sides?
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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > why aren't the frame rails of TT set evenly from the sides?

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trailernovice

Mission TX

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Posted: 12/03/20 09:37am Link  |  Quote  |  Print  |  Notify Moderator

I discussed need for replacing bumper in other threads...

soooooo, the welder is here with the replacement, thicker bumper...and he measures to ensure it sticks out evenly from each frame rails....then a FLASH of recognition!!! The 'front to back' frame rails of the trailer (Jayco SLX 264BH) are not set evenly under the trailer...one of the rails is about 4 inches closer to the outside of the trailer than the other...put another way, the driver side rail is set about 8 inches from the outside edge of the trailer, while the passenger side frame rail is set about 12 inches from the outside edge

this is factory....nothing twisted or anything

Any ideas why it's designed that way?


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kmac7800

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Posted: 12/03/20 10:10am Link  |  Quote  |  Print  |  Notify Moderator

Could the driver side of your trailer be "heavier" than the passenger side? Therefore the weight would be evenly distributed? Just an idea.

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Old-Biscuit

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Posted: 12/03/20 10:12am Link  |  Quote  |  Print  |  Notify Moderator

Call Jayco and get the scoop from them....they spec the frames


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trailernovice

Mission TX

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Posted: 12/03/20 10:16am Link  |  Quote  |  Print  |  Notify Moderator

ctying in with KMAC's thought...that COULD be....the way its designed:
front bed--dead in the middle
--kitchen, with stove and fridge...driver side
--full-size bunks...driver side
--bathroom and dinette...passenger side

this is a no-slide trailer, so THAT can't be the reason...unless maybe just maybe this design is also used on a trailer WITH a slide??? Just thinking out loud

sure wish I had a firm grip on the answer of why the frame rails are offset from center

mleekamp

Washington, IL

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Posted: 12/03/20 10:41am Link  |  Quote  |  Print  |  Notify Moderator

Outside of calling Jayco as already suggested, maybe try and find that model locally and measure it for reference. Stop by the Jayco dealer and ask, maybe take a few measurements on similar or other models

Other than the center of gravity answer, I'm stumped too.


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BurbMan

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Posted: 12/03/20 11:09am Link  |  Quote  |  Print  |  Notify Moderator

Jayco makes their own frames and talks about construction here on their blog.

If you think about it, the tongue goes back and connects with the frame rails, so in order for the point of the triangle (coupler) to be in the center, the frame rails have to be equidistant from either side.

I suspect that there is additional framing that you can't see under the coroplast bottom. Don't overthink it, just have the welder pout the bumper on.


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trailernovice

Mission TX

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Posted: 12/03/20 11:16am Link  |  Quote  |  Print  |  Notify Moderator

actually, re. the coupler...looked at that...at the very front of the trailer is a plate welded across the front of the frame rails...the rails themselves are not visible...the coupler is (as logic and physics dictate) mounted right in the middle, but it's mounting point is this plate in front of the frame rails...

no way to tell how the rails themselves are configured...they're blocked by the plate at the front and the plastic sheeting under the unit

BurbMan

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Posted: 12/03/20 11:20am Link  |  Quote  |  Print  |  Notify Moderator

You missed the point. Yes, the coupler is attached to a plate welded across the front, but those rails that go back from the coupler form a triangle. Look at this picture from the Jayco blog:

[image]

dodge guy

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Posted: 12/03/20 11:37am Link  |  Quote  |  Print  |  Notify Moderator

Sounds like it wasn’t built properly. The frame should be mounted evenly under the box. I would say less than a 1/4” variance side-side. They need to be the same distance as the spring pads in the axles.


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Tyler0215

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Posted: 12/03/20 12:16pm Link  |  Quote  |  Print  |  Notify Moderator

If it pulls straight, don't worry about it.

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 > why aren't the frame rails of TT set evenly from the sides?
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