Soundboard drydown for installation

[Ron Nossaman]

> In this restrained condition, what happens to the board
> itself in terms of dimensional shrinkage, not in terms of
> crown/down-bearing/etc, but simply in terms of when will
> the board want to crack.
> 
> Jim I

Good question. I don't know. Neither does Jude, which is why 
he's gone down the middle with the hybrid. I'd expect the 
board would crack at some point, but it will sooner or later 
in any construction given that kind of MC variation. 
Functionally, the difference is that a panel in an RC&S board 
can crush and crack until it looks like a corn crib and still 
function quite well, where a CC board would be toast, and an 
RC hybrid would be degraded to whatever degree it relied on 
panel compression for stiffness.

This is where RC&S with a laminated panel is the obvious out.

Ron N