Warped grand piano lid

[Brian Henselman]

Willem,

I hope that trash can doesn't leak! Or as you put it,  "you'll wind up with
a different problem."

Maybe sand in the can would be safer?

Just my 2 cents worth...

-Brian Henselman, RPT

-----Original Message-----
From: Wimblees@AOL.COM <Wimblees@AOL.COM>
To: pianotech@ptg.org <pianotech@ptg.org>
Date: Tuesday, September 28, 1999 7:26 PM
Subject: Re: Warped grand piano lid


>In a message dated 9/28/99 4:01:28 PM !!!First Boot!!!,
lawsonic@global.co.za
>writes:
>
><< Hi list, One of my next contract jobs is a grand where the lid has
warped
> considerably, might be described as an S shaped crown as Ron might put it,
> but this is a lid, not a soundboard. Warp is such that at the right hand
> corner (by hinge) is about half an inch up when lid "closed". This
happened
> some time ago when I believe owner had it in storage somewhere. It is
> figured walnut and weighting cost of feasable repair against replacement.
I
> had thoughts of pvc go bars as recently described except workshop has very
> high ceiling and not sure how much pressure for how long if this is an
> option.
>
> Thoughts, suggestions, comments welcome.
>  >>
>
>
>Putting pressure on the lid to make it flat, if the lid is laying on a flat
>surface will not take out the warp. You will actually have to over bend it
>past level, to get it to straighten out. If you are going to have the piano
>in the shop, put the lid on the ground, but put most of it on 2x4s, so that
>the warped part is hanging free. Put a large heavy object, like a garbage
can
>with water in it, on the warped end, and let the weight push it down. Check
>frequently to see the process. Caution. Do not put a damp cloth or add
water
>to the lid.  because that will effect the veneer of the lid, and you'll
wind
>up with a different problem.
>
>Good luck
>
>Willem