Do you dry the ribs, along with the board, prior to gluing ?

[Prof. Euphonious Thump]

"Rib Extenders "??? What's that ???
    This one has wide, flat topped ribs,. so I thought
I might laminate something ( suggestions as per
materials appreciated ) to their tops, if I'm not
happy with the crown I get.
    I'll tell you all about this recrowning method
when I'm done, and have more to report per results.

    Peace,
     Thump


--- Richard Brekne <ricb at pianostemmer.no> wrote:

> Hey Thump.
> 
> Not quite sure enough of what you're up to has come
> through here.  Are 
> you removing ribs or just working glue in where
> they've come loose from 
> the panel already ? What exactly is this method of
> recrowning ?  I doubt 
> seriously whether gluing a few mm of loose rib/panel
> contact along 
> cracks before or after drying is going to make all
> that much difference 
> to the amount of crown if thats what you are
> doing.... and as far as 
> getting reverse crown upon taking on humidity....
> nahhh...  with or 
> without filling the cracks if anything you'd be
> tending towards crown 
> increase.... of which their would probably be very
> little if any.
> 
> I'd like to hear more about this recrowning method. 
> So far the best 
> suggestion I've heard for compression reliant boards
> is rib extenders... 
> a bit of work to install but just so.
> 
> Cheers
> RicB
> 
> 
>     Dear List,
> 
>     I'm attempting a  soundboard recrowning by a
> method another
>     technician says he's done dozens by,
> successfully. The first step
>     involves extensive drying in a "dry-room". (
> Mine's a  portable
>     building with a  dehumidifier and oil-filled
> heater,  where the
>     humidity's about 10%, and the heat's about 90 ).
>  It's been in there
>     a couple of weeks, and the board's existing
> cracks are nice and
>     wide, but I haven't glued the board back to the
> ribs, yet, where
>     they're loose on the sides of the cracks, and
> suddenly wonder if,
>     maybe, I should have done this before I dried it
> all down ??? In
>     other words: if I glue them now, and the board
> and ribs take on
>     moisture, will that, in fact, cause the baord to
> push the ribs DOWN,
>     because the   very dry  ) wood that's glued to
> them will be justa 
>     tad sort of where it used to be ?   Or am I
> worrying too much about
>     "nothing" ???   And I sort a figured that the
> question of whether
>     ribs were dried prior to glue-up had some
> bearing on the question.
> 
>     Thump
> 
> 



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