bozodog
Carpal Tunnel
Reged: 12/19/07
Posts: 9938
Loc: SW Michigan
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Plywood is crossed grained for strength. It means "crossing the grain when laminating sheets, you gain strength by crossing those outer layers that are always lengthwise.
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Governments don’t bear the cost of anything; their citizens do.
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brooksnb
Super Handyman
Reged: 03/03/07
Posts: 2138
Loc: New Brunswick , Canada
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Quote:
Plywood is crossed grained for strength. It means "crossing the grain when laminating sheets, you gain strength by crossing those outer layers that are always lengthwise.
The OP wants to lengthen the plywood...therefore to do it the way you describe he would either need to use 4' lengths and laminate then or forego the concern of the top (usually thinner ) layer and have a full sheet to work with...tagging two 4' sections on either end. I know what you are trying to say but if it was stronger I would have been doing it that way long ago...it simply does not ...you actually lose strength because you need to work with more joins and less overlap...I agree on a 4' square your method is a little stronger but the OP is looking to produce a 12' length ...
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Dennis
Just another trouble making Canadian....
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bozodog
Carpal Tunnel
Reged: 12/19/07
Posts: 9938
Loc: SW Michigan
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Well, we'll agree to disagree. If I were laminating three layers of 1/4", 12'x 4-8'(?), for strength, I would cross the grains on the middle layer, and stagger the seams on the outside panels.
The question/answer is moot. Cab has decided to recreate the panel like it was manufactured, with a framework and foam inserts. Best choice, IMO.
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Governments don’t bear the cost of anything; their citizens do.
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brooksnb
Super Handyman
Reged: 03/03/07
Posts: 2138
Loc: New Brunswick , Canada
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No problem ...lol.. I often had to laminate when we built church pews...we laminated up to 40 feet and tried several methods but the only one that would hold up was the one I described. Building comercial seating introduced a whole set of interesting challenges.
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Dennis
Just another trouble making Canadian....
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CabinConnection
Big Foot
Reged: 01/20/04
Posts: 20932
Loc: The Indianhead's Left Nostril....
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OH PHEW!
I've just returned from a 2 day ride down the Mississippi, and started reading the continuation of this thread.
I was worried you two were going to explain to me that the OEM's design sucked, and that I should start to cross dress.
Uhhh...
Cross-lam.
Uhhh...
Cross SOMETHING!
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brooksnb
Super Handyman
Reged: 03/03/07
Posts: 2138
Loc: New Brunswick , Canada
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Quote:
OEM's design sucked, and that I should start to cross dress.
LOL..friendly bantering just for you... 
Always keep in mind that if everyone agreed nothing would get better...
BTW...send pics ...preferably of the trip !!
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Dennis
Just another trouble making Canadian....
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CabinConnection
Big Foot
Reged: 01/20/04
Posts: 20932
Loc: The Indianhead's Left Nostril....
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Quote:
BTW...send pics ...preferably of the trip !!
WHICH trip???
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brooksnb
Super Handyman
Reged: 03/03/07
Posts: 2138
Loc: New Brunswick , Canada
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Quote:
I've just returned from a 2 day ride down the Mississippi
This one sounds like a nice one ....now stop with all the questions and post the darned pics !!! LOL
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Dennis
Just another trouble making Canadian....
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CabinConnection
Big Foot
Reged: 01/20/04
Posts: 20932
Loc: The Indianhead's Left Nostril....
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Quote:
post the darned pics !!! LOL
Your wish is my command. 
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