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Topic ClosedFloor failure!!!
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Topic: Floor failure!!!
    Posted: 21 Sep 2019 at 1:10pm
Had 3 conversations with folks with the same issue today.

Good news was for one Lippert stepped up and stacked a 2x2x1/4" tube to theirs. That was pleasing to hear. Their unit is equal to the age of mine.

One of the others his unit is several years old and just found the issue and about to have basically the same repair done.

The last one claimed he bought it used and the dealer told him it was normal.. He has a issue that may or not be made good. I do feel sad for him that he believed what he was told. I don't know what state he is from and if indeed it could be sold "as is". In my state it can not. 

I am a bit relieved to hear that one had their trailer repaired. I was also told that it took Lippert 6 weeks to decide. Lippert has had the claim for 3 weeks now. Claim was placed with FR 6 weeks ago. 
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Posted: 20 Sep 2019 at 2:33pm
Week 6. Going through the FR/Lippert shuffle. Pictures and info have been again requested that have already been submitted.. My representative at the Dealership is doing a very good job so far. There has been no reason so far to get involved. Thankfully.. 

May only statement so far has been we're getting into winterizing season.. There is no water in the tanks or lines, things will freeze quickly. 

I'm staying optimistic, yet watching temps.. People and weather.
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Posted: 12 Sep 2019 at 7:50am
Now coming into week 5.. FR and Lippert are tossing it back and forth right now. I don't know if anyone has seriously looked into this yet. 

Best I can tell so far, is there is no time limit to how long they can do this, tossing it back and forth. 
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Posted: 01 Sep 2019 at 9:22am
End of week 3 Update:

No progress.. Still in Lippert's hands (or on someone's desk).

I do like how the dealership is doing this and have had several conversations through all this with them. They will be requesting an update next week. No more info or pictures have been requested this past week, so it seems Lippert has what they need to make a determination. 
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Posted: 23 Aug 2019 at 12:10pm
End of week 2 update:

FR has turned it over to Lippert now and Lippert is requesting more pictures.

Well, good news is no one has flat out rejected the claim/issue. 
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Posted: 15 Aug 2019 at 2:16pm
Originally posted by David and Danette

   This has been interesting and educational because on our Gulf Stream Vista Cruiser I have been thinking about strengthening the tongue. The metal bows when camper is loaded and being our model is the heaviest Vista Cruiser using this frame I am a Little concerned. For the 2020 models they use a stronger frame perhaps the engineers were a little concerned too. There has been a lot of useful information that is what is so good about this forum. Thank you

This may be something for you to look at. It comes from someone assisting in my trailer build design on the frame. Yes, I'm going to build my next once I get through this mess..
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David and Danette View Drop Down
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Posts: 1226 		Direct Link To This Post Posted: 15 Aug 2019 at 2:04pm
   This has been interesting and educational because on our Gulf Stream Vista Cruiser I have been thinking about strengthening the tongue. The metal bows when camper is loaded and being our model is the heaviest Vista Cruiser using this frame I am a Little concerned. For the 2020 models they use a stronger frame perhaps the engineers were a little concerned too. There has been a lot of useful information that is what is so good about this forum. Thank you
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geewizard View Drop Down
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Posts: 347 		Direct Link To This Post Posted: 15 Aug 2019 at 9:44am
Thanks, offgrid.  Now I know.
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offgrid View Drop Down
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Posts: 5290 		Direct Link To This Post Posted: 15 Aug 2019 at 9:33am
I found this on a metalworking forum. Control of thermal distortion looks like one reason for stitch welding, another being cost if a continuous weld is just not necessary. There is a 3rd reason suggested which appears to involve differences in properties between the weld metal and the base material but there isn't sufficient explanation as to why a continuous weld might result in a weaker joint in that case. Maybe Toyanvil can explain it. 

My first job as a welding engineer was as a joint detailer literally going through hundreds to thousands of welding blue prints and specifying and writing all the weld symbols. A lot of the time I was given the joint strength requirements and had to figure out the weldingdetail from that.

now as to why stitch welds are used. Distortion control is generally the first reason. In general lower heat= less distortion. And distributing that heat evenly, by skipping around, back stepping etc can help control distortion. You can also control distortion by preheating a part (another discussion)

In general the other reason joints are only intermittently welded is economics and strength.

For example a simple stiffener like a gusset on the leg of stand almost never needs a full weld. Assuming the material is the same thickness. The main member will fail by buckling or torsional stress way before the stiffener would fail. So placing full length welds gives you no strength advantages and lots of headaches and wasted cost. I remember specifically taking out pass after pass

I would say about 90% of intermittent welds (Besides distortion) are specified for this reason. The service condition stress is way lower than what a full welded joint would provide. So why bother?

finally occasionally in the post welded condition or by using a different filler material a weld joint will have a higher strength than the base metal In that case fully welding will not increase strength and actually may decrease it. In those cases intermittent welds are called out, but that requires a decent amount of pencil and paper engineering. 
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geewizard View Drop Down
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Posts: 347 		Direct Link To This Post Posted: 15 Aug 2019 at 8:34am
I just cannot see how a stitch weld would be stronger than a continuous seam weld.  I think stitch welding is done just to save time, money, and filler.
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