Stitch welding does have its place in the manufacturing process if it's used correctly but yes RockDr896 is correct they are saving Fab Time and Materials. But I will say I have seen lots of pretty interesting welds. Bad enough where the fabricator/welder misses the joint totally with a cold lapped weld that doesn't bond anyway. It's all about quantity not quality in the mass manufacturing these days!
correct Campingsxs85........with Lippert in the spot light here and maybe Alliance, if they build it to Alliance specs....It only points to a cost savings move for Alliance/Lippert....based on when their liabilities go away. They are building to a warranty and what truck buyers can afford (5th wheels only and leaving out the other options for now). So what happens, when 3 stitch welds, have one or more bad welds? We are saying the same thing, so I am not throwing any shade here. I think this is an example of three nails....but 1 nail failing.
So if I frame a back porch...to save on nail cost....I only put a nail at the top, middle, and bottom nail holes available....If 3 won't hold it, then how would more nails help...(Stitch Welding in my opinion)..... The national builders code and local inspections have responded to the "fly by night" deck builders. If you have a 8" joist, then it needs a solid attachment. The approved joist hanger, makes knowing how many nails are needed. The home owner, inspector, and builder know how many nails are needed. I am thinking a design error exists within the CAD software, or it is a purposeful decision. The reason I started to make my own parts and equipment was not only cost....it was down time. Because the inspection requirement was needed, they had to address the failures of the trades....hence the national building code. The legal protection for the inspection operation by state. So the wild west of the RV industry is agreeing on a standard....owned by 3 major companies.
There is no inspections of any vehicles "on the road today" at the build stage. Despite, it's potential impact on our Federal highways. It is a great example of self policing products and the liabilities of their build mistakes via a warranty and possibly recalls (A Legal thang). I think they "design" to this minimum to "compete on price". If it wasn't for those DIY types, they would have a much smaller market.
The baby boomer bubble is almost at the end (1963). Meaning tradesman or others who have the interest and willing to go through the learning curve to still buy the product are in their 60's. If they don't address the longevity of the RV, then the market is going to change, yet again. Maybe this is why Alliance is moving into Class A and B products by buying a Terex subsidiary.
Anyway, I am just piling on at this point. In welding, there is no real reason to not run a full weld and fasten the entire piece of metal. I think I feel better, having typed my rant. This is nothing our forum can fix, but it is great fire side conversation!! I am also speaking from a perspective, that I think I know what the problem is. So this is just my take....fire away!!