Rib dimensions

[Greg Newell]

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At 04:40 PM 12/10/2003, you wrote:
>Hello,
>
>I'm trying to apply some science to my soundboard rib making and I am
>looking for "tables of static values for  the Resisting Moment (W) and the
>Moment of Inertia (I) for all the possible cross sections of sugarpine and
>spruce (DIN 1052 Class I will suffice).
>
>What is the formula for converting pounds/inch squared to kg/cm squared?
>
>Given a right angle connected to the outside of an arc of a circle, how do
>you prove the circle is 60'? (I made a jig for crowning ribs that is
>adjustable and I want to calibrate it.

Jude,
         Sounds like a cool jig. Got any pictures?


>Thanks,
>
>Jude Reveley, RPT

Greg Newell
Greg's piano Fort=E9
mailto:gnewell@ameritech.net=20
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