[CAUT] killer half-octave

[Cy Shuster]

----- Original Message ----- 
From: "Ron Nossaman" <rnossaman at cox.net>
To: "College and University Technicians" <caut at ptg.org>
Sent: Thursday, May 17, 2007 6:14 PM
Subject: Re: [CAUT] killer half-octave


> Ron Overs wrote:
>> Hello Don and all,
>>
>> I have a clue as to ". . . why this happened". After considering the 
>> structure of these belly rails, I would be very concerned about 
>> connecting such a tension device. In my workshop, the solution to this 
>> soundboard-perimeter-support-stiffness problem has been to ditch the 
>> 'bell' and fit an extra back beam in the treble.
>
> Absolutely, Ron. In addition to the brace, I also put one or two 5/8" 
> steel bars through the front of the belly rail, and back into the rim for 
> further bracing and mass loading. They're epoxied into both the belly 
> rail, and the rim. It makes a substantial difference. In any case, the 
> bell goes.
>
> Ron N

The "bell" is a plate nose bolt support, right?  Any thoughts on why that 
original design used an expensive casting rather than an extra beam?  Ease 
of assembly?

--Cy--