Laminated ribs

[Ron Nossaman]

>          My question is are these flat laminated pieces cut with a crown 
> in them or are you crowning the ribs  in a curved caul. I know this was 
> discussed some time back but hey I don't recall it. If they're laminated 
> in a curve aren't they indeed more of a true arched rib (or arched beam) 
> than a solid piece of  spruce rib stock with a machine cut curve. In the 
> rib glued in a curve the ribs  the grain is indeed in an arch even if it 
> was made thick enough to cut the bottom of the rib flat so as it had more 
> material in the middle than on the ends. With a rib laminated in an arch 
> config. it's also possible to have a rib of uniform dimension (if thats 
> desireable).

Is a rib you make from a single piece of wood with curved grain an arch? 
The laminated rib isn't either because the laminations are glued together. 
As long as the glue holds, it's a solid piece of wood.

Ron N