laminated ribs

[Ron Nossaman]

> Or, for a much more complete picture, you can measure the change in 
> crown at all accessible ribs! That's what I do. You get dirtier and say 
> more nasty words, but you sure get a great picture of what is happening 
> down yonder. I tape a string at one end of the panel near a rib and hold 
> it to the panel at the other end of the rib. Then I use a series of 
> little feeler-gauge wooden blocks that I made up (in half-millimeter 
> increments) to see which one will just fit between the string and the 
> panel bottom. 

Or a wedge, with increments marked off along it's face so you 
only have to keep track of one tool.


>I do that at all accessible ribs both before pre-stressing 
> and with the board loaded.
>  
> The first time I did that was a MAJOR "Ahh-Ha" moment for me!

Neat, ain't it?

Ron N