Brian Gray
 Posts: 339
Joined: 2004-01-21
Location: Sandusky, OH
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I would say yes.
Because this is a torsion box, maybe you could get away with it, but I really doubt it, especially across the 80" span.
It's really not a big chore to veneer both sides, and then you are sure to be safe. For projects where the back won't be seen, I keep rolls of phenolic backer on hand. Basically, it's the paper component of paper-backed veneer, without the veneer. Usually, there's no seaming, because it comes in large widths.
This question comes up often here, with variations, and the answer usually is yes...do the backer, with some rare exceptions. But most of the time, the answer is play it safe...it's not a hell of a lot more work to simply put on another skin.
My 2 cents...
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