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  #11  
Old 09-09-2011
davidmbrady
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Quote:
Originally Posted by moonbeam express View Post
I looked at the 3A website for Alucobond and I see it is an aluminum skinned sandwich with a plastic core. How then is this sandwich adhered to the RV? How is the inner aluminum panel insulated from the steel structure it attaches to?
Hi Corey,

The Alucobond is clipped and bonded on using an adhesive, and anodized to prevent corrosion. It's 100% non-structural and is simply along for the ride. It's specific weight is about 1/3 the amount of BB's more typical side wall cladding: 16 gauge galvanized steel. The M380 also has a one piece 0.040" thick aluminum roof skin which is anodized, bonded and riveted. The basement floor is fluted stainless steel. The rear cap, front cap, and basement doors are fiberglass. The slide bodies are aluminum framed and skinned in aluminum. The Alucobond is only used on the flat sides and only from the floor belt (above the basement doors) to the roof line (where the aluminum roof skin attaches), or about 6' high and the length of the coach minus cutouts.

My personal opinion is I wouldn't have any problem with it. As was said before, do a PPI and if there's no evidence of expansion issues, it's good to go.
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  #12  
Old 09-09-2011
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moonbeam express moonbeam express is offline
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Your endorsement is good enough for me.

I had some experience bonding aluminum to steel, good and bad, with building my MCI bus. I learned one valuable lesson, always use Sikaflex! Tried a 3M product that had same claims as Sikaflex and if it weren't for a few locating rivets I would have had a 10X5 sheet of aluminum letting go at highway speeds when the bond suddenly let go! Yikes!
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  #13  
Old 09-09-2011
davidmbrady
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Originally Posted by moonbeam express View Post
Your endorsement is good enough for me.
Corey,

Coming from a captain of industry such as yourself, that comment is very much appreciated. Thanks!

X2 on the Sikaflex.
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  #14  
Old 09-09-2011
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bwinter1946 bwinter1946 is offline
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Quote:
Originally Posted by mynavion View Post
You know even the all steel birds wrinkle a bit also. On mine in the summer you can see some waviness on the side directly facing the sun. I've seen it on many birds....
Agreed!!
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  #15  
Old 09-09-2011
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Randy Dupree Randy Dupree is offline
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Oh yeah,thats for sure.
And the coachs without rivets show the waves even more.
The rivets kind of create there own waves.
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  #16  
Old 04-07-2013
am380 am380 is offline
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Randy do you know what the measurements of the steel ribs are in the side walls m380
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  #17  
Old 04-07-2013
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Randy Dupree Randy Dupree is offline
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Quote:
Originally Posted by am380 View Post
Randy do you know what the measurements of the steel ribs are in the side walls m380
No sir,i do not.
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  #18  
Old 04-07-2013
am380 am380 is offline
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Thanks for getting back.
Do you know of any drawing I can fine on the web
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  #19  
Old 04-07-2013
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Based on the behavior of a studfinder I would say the tubing is probably 1-1/2 inches and the coach dimensions imply that the tubing is square.
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  #20  
Old 04-08-2013
am380 am380 is offline
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Thanks for the info.
I assume that the outside skin is about 1/4 inch and the plywood in the inside is 3/8 to 1/2 inch thick. I talked to Dan at Parliament Coach and he tiring to fine a drawing on the rib cage of the m380.
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