[pianotech] Bottom Board Material

[George F Emerson]

When I was a university tech, it was a standard procedure, for any and all 
studio uprights that came into the shop, to get Tee-nuts in the bottomboard 
to replace wood screws.  With pelican springs, for example, we would replace 
the screw nearest the fulcrum with a Tee-nut and bolt, leaving the original 
screw furthest out on the spring, as it bares relatively little stress.

Frank Emerson

----- Original Message ----- 
From: "Ron Nossaman" <rnossaman at cox.net>
To: <pianotech at ptg.org>
Sent: Friday, February 18, 2011 8:31 AM
Subject: Re: [pianotech] Bottom Board Material


> On 2/18/2011 7:10 AM, Terry Farrell wrote:
>> Baltic Birch has many thin laminations - is that correct?
>
> That's the stuff.
>
>
>>Are the inner
>> laminations reasonably hard for good screw holding?
>
> As far as I can tell, it's the same stuff throughout, unless it's changed 
> since the last time I used some. That sort of thing happens more than I 
> like. In which case, t-nuts.
>
> Ron N
>