Re-ribbing an olde board

[Erwinspiano@aol.com]

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Joe
  Interesting & true. I also agree with your point of view.  However I have 
recrowned an upright boards without taking it out of the  piano & it sounded 
unbelievably great. How long it last & is viable is a  guess but it will 
probably out live me. I posted this before & it's in the  archives probably under 
recrowning. duh Dale
  Dale

Joe  Garrett wrote:

> Yes, I changed the subject.<G>
> The  one thing that gets me to NOT want to do a re-ribbing of an olde 
>  board, is the fact that wood does age. Forget the compression factor 
>  for now. Let's just consider this: In the aging process of wood, it 
>  loses it's cellular cohesion/bonding. At some point, this aging 
>  process creates what is known as Brash Failure. If wood is kept in a 
>  consistant environment, it will eventually turn to stone, (ie 
>  petrify). The Brash Failure occurs about half way to the petriying  stage.
> Most of us have run into the action w/parts that defy repair.  These 
> actions are in the first stages of Brash Failure. The best way  to 
> explain how the wood reacts is: a new shank/dowel, when broken  will 
> splinter. One with Brash Failure will break cleanly, as if it  were 
> sawn. I've seen this problem on parts that were less than  50years 
> olde, so there's really no way of telling when this will  occur.
> So, back to the boards....I feel that there is no way of  knowing how 
> much more time the wood, of the sound board will have, so  I'm very 
> reluctant to re-rib a board, even though it is an intriguing  
> idea/technique. I think, that if I'm going to go to all the trouble  to 
> take a board out, then I'll improve on what was there originally,  if I 
> can.
> Best Regards,
> Joe Garrett, R.P.T.
>  Captain, Tool Police
> Squares R I


 

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