1 x 1 tube vs 1 x 1.5 tube

[Charly]

Hey,

While researching trailer builders and options, I have noticed those that use tube either use 1 x 1 or 1 x 1.5.

Having been a fabricator in the past, I understand the 1 x 1.5 will have a strength advantage, but my query revolves around...

Has it been found to make a functional difference in longevity / strength ?

Anyone have issues with "only a 1 x 1" frame ?

Comparing prices, there really isnt much of a difference ..except when i add windows. The builder that does 1 x 1.5 tube wants considerably more for factory window installs.

Leaves me with the choice of getting the 1 x 1 frame with factory installed windows or get the 1 x 1.5 frame and self install windows

Either way, I am really just wondering about the actual functional difference.

thank you.

 

[tx2sturgis]

Installing windows after the trailer is yours, is doable of course, but it is a bit of a pain.

Is this a large, heavy duty trailer? Or a smaller one that will only have minimal weight inside when completed?

 

[Zoomyn]

Yes the larger measure tube should be more rigid even with thinner walls but then risks cracking/tearing at structure welds or bolted attachment points if exposed to flexing etc.. Without knowing box beam wall thickness the outside dimensions become academic - With every thing else being equal then the 1-1/2" is superior, DIY windows are easy and even preferable to just the OEM guess of how you'll really want your window installation. An example is having to stoop to look out windows when standing inside if* they're laid out too low - hear a noise outside and crouching down to see gets old, so a mix of high/low might be a stress buster, or low windows being more vulnerable to smash'n grab borrowing...

 

[John61CT]

If the longer dimension is in the direction of the forces stressing it, will make a huge strength difference.

 

[Charly]

this will be in a boondocking /offroad, full time 6 x12 cargo. weight is minimal (I lived off an enduro bike for 7 years)

 

[highdesertranger]

yes it depends on how it was built. the 1.5 is a lot stronger if the force is applied to the long measurement. if however if it is applied to the short side it makes no difference. also wall thickness makes a huge difference to a point. highdesertranger

 

[Charly]

orientation on the trailer would be long side facing front and rear, so walls are touching the 1" side.

 

[John61CT]

So stronger against front wind resistance on the highway, but not sideways forces.

 

[Charly]

so, outside of a physics discussion, .....practically, would the difference between 1 x 1 and 1 x 1.5 matter much in choosing a wall and ceiling construction for a cargo trailer with 16" OC placement?

 

[John61CT]

An accurate answer would require full details of the other components and construction techniques involved, and engineering modeling which of course involves physics.

And depends how fast you drive, how likely to scrape under obstacles etc.

Bottom line is you need to trust the maker did their homework properly, best basis for the choice is their long-term reputation.

 

[Charly]

engineering modeling...ok, thanks.

 

[tx2sturgis]

For your stated use, I think the 1" square tube would be fine. 

A lot of these trailers, including the one I bought, have cheap Z-channel vertical wall 'studs'...avoid those if you can.