What is your tolerance for sheet good flatness?

[Bill ThompsonNM]

Good to talk about this, maybe someone will introduce yet another grade of plywood: Flat to within xx across the sheet...

[Carl Beckett]

Maybe the question is:

What would you be willing to pay for flatter material? The baltic birch and apple ply and phenolic skinned materials I have used are all usually pretty flat.

But I wouldnt pay for those for general purpose construction.

So we need a price elasticity curve - cost vs 'flatness' (again I dont know how to spec flatness without a CMM)

Say:

.060 over 4ft = $125/sheet
1/8 over 8 ft = $70/sheet
1/4 over 8ft = $50/sheet
1/2 over 8ft = $40/sheet

These would be for birch or maple veneer.