[pianotech] MOE for sugar pine versus sitka spruce

[Encore Pianos]

Thank you for that info.    I have had others do these calculations for me
in the past for rib dimensions, and do not have this  formula.   I would
love to do this calculation myself.  Is it possible to ask for this beam
deflection formula?

Will Truitt

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of David Love
Sent: Thursday, February 24, 2011 12:43 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] MOE for sugar pine versus sitka spruce

I know you asked Nick but the answer is you simply substitute the MOE number
for sugar pine into your beam deflection formula that formerly had the MOE
for sitka spruce.
David Love
www.davidlovepianos.com
(sent from bb)

-----Original Message-----
From: "Encore Pianos" <encorepianos at metrocast.net>
Sender: pianotech-bounces at ptg.org
Date: Thu, 24 Feb 2011 12:22:50
To: <pianotech at ptg.org>
Reply-To: pianotech at ptg.org
Subject: Re: [pianotech] MOE for sugar pine versus sitka spruce

Hi Nick:

I'm trying to understand this too.  Do these MOE values mean that Sugar Pine
is about 75.8% as stiff as Sitka Spruce?  If one were to substitute a sugar
pine rib for a sitka spruce one, how would one go about calculating sizing
the  sugar pine rib to accommodate the same loading as a sitka spruce rib of
given dimensions?

Will Truitt

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Nicholas Gravagne
Sent: Thursday, February 24, 2011 11:06 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] MOE for sugar pine versus sitka spruce

David,

Your chart is compiled in SI units. So, making conversions from English MOEs
for Sugar Pine and Sitka, we come up with this:

Sugar Pine MOE = 837
Sitka Spruce MOE = 1104

Now you can compare this data to your chart.

I assume you are considering for evaluating rib materials? No need to reply
to this question, though.

Hope this helps


>
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
> Behalf Of David Love
> Sent: Wednesday, February 23, 2011 7:31 AM
> To: pianotech at ptg.org
> Subject: [pianotech] MOE for sugar pine versus sitka spruce
>
> In the chart below does anyone know which MOE corresponds more closely 
> to sugar pine and sitka spruce or just happen to know the MOE for each 
> of those?
>
> http://www.csudh.edu/oliver/chemdata/woods.htm
>
>
> David Love
> www.davidlovepianos.com
>
>
>
>



--
Nick Gravagne, RPT
AST Mechanical Engineering