[pianotech] Screens under counterbearing bars

[Encore Pianos]

I always thought their purpose was to serve as a  thicknessing shim, as they
often are not under all of the front duplex bars.  

Will Truitt

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of David Love
Sent: Tuesday, July 24, 2012 7:39 PM
To: pianotech at ptg.org
Subject: [pianotech] Screens under counterbearing bars

Does anyone know what purpose (if any) those mesh screens serve that are
under the movable counterbearing bars on older Steinways?  Are they just non
skid surfaces, or do they function as some kind of buzz barrier between the
bars and the plate, or something else I haven't thought of?

David Love
www.davidlovepianos.com