Function of the rim

[Ron Nossaman]

>On the members area of the PTG site, I've found a great "practice test" for
>the RPT written exam (thanks to the Chicago Chapter).  I scratched my head
>on this question:
>
>
>
>71) The outer rim of the grand piano primarily serves to provide a
>
>                 A. cosmetic structure against wood deterioration
>
>                 B. resistant structure against the force of the soundboard
>crown
>
>                 C. resonant structure to enhance tone
>
>                 D. vertical structure for the top lid to rest on
>
>
>
>In the answer key, it gives "B" as the correct answer.  From what I've read
>here, it seems that neither compression-crowned nor rib-crowned boards get
>much assistance from the rim.  In fact, in both cases it seems that crown is
>achieved completely before installation into the cabinet.
>
>
>
>Is this outdated info?  Does this reflect the received wisdom as expressed
>in the current RPT exam?
>
>
>
>--Cy Shuster--

Should be D, shouldn't it?

Ron N