Aluminum Box Beam Load Bearing Properties

[David Ilvedson]

It's a little stronger than a T5...;-]

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "David Love" <davidlovepianos at comcast.net>
To: "Pianotech List" <pianotech at ptg.org>
Received: 12/17/2007 7:44:58 PM
Subject: RE: Aluminum Box Beam Load Bearing Properties


>I really appreciate you pursuing this on my account, but what is a T6 box?  

>David Love
>davidlovepianos at comcast.net 
>www.davidlovepianos.com

>-----Original Message-----
>From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
>Of Ron Nossaman
>Sent: Monday, December 17, 2007 1:56 PM
>To: Pianotech List
>Subject: Re: Aluminum Box Beam Load Bearing Properties


>> An aluminum pneumatic rib press.  Two aluminum box beams (upper and lower)
>> held together by vertical pieces of aluminum angle "iron" with room for a
>> single 2x4 cut into the shaped caul between which the rib, soundboard
>panel
>> and pneumatically operated hose would go.  Nice and light and easily
>> storable.  Just trying to figure out how big the box beam needs to be,
>1.5"
>> wide is all I need in that dimension so the key, as it always is with
>beams,
>> is the height.  The caul would add a bit of stiffness to the assembly as
>> well.    
>> 
>> David Love

>Near as I can tell, an 1/8" wall T6 aluminum box would be 
>around 150% as stiff as solid maple of the same dimension. I'd 
>go maybe 5" on the height.
>Ron N