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bob J
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PostPosted: Sun Jul 15, 2007 11:20 pm 
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Koa
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First name: Bob
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Question..
If one uses addi -split into straight-Why can't one use 1/4" bracing. Addi is strong and it is my basic understanding that strength of the brace is produced mostly by height. So, why not?
Thanks,
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tippie53
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PostPosted: Sun Jul 15, 2007 11:25 pm 
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   I see no reason that you can't. Martin has been using 1/4 sitka bracing for years. Look at the D35.
john hall
blues creek guitars
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Kim
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PostPosted: Sun Jul 15, 2007 11:44 pm 
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Yep, Martin do it and as long as the brace is tall enough to be structurally sound why should there be a problem. After all, given the compounding effect of strength to height ratio one could very easily over build with 1/4" braces.

Cheers

Kim
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Colby Horton
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PostPosted: Sun Jul 15, 2007 11:58 pm 
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This is an interesting idea.


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Colin S
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PostPosted: Sun Jul 15, 2007 11:59 pm 
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The widest braces I use (only go up to OM/OOO) are 6mm for the X and upper tone bar, the rest are only 5mm. I usually use Euro spruce for my bracing.

Colin

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JJ Donohue
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PostPosted: Mon Jul 16, 2007 12:05 am 
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Bob...I've used 1/4" bracing on 7 guitars that included Parlors, OM's, 000's and SJ's. Height has varied depending on top stiffness and voicing choices.

In general, we rookies tend to over-brace.

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Brock Poling
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PostPosted: Mon Jul 16, 2007 10:12 am 
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Remember... the strength increases linearly for increases in width and x^3 for increases in height.

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Jim Watts
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PostPosted: Mon Jul 16, 2007 2:39 pm 
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Todd is pointing out a very important point, the stiffness is what increases with the cube of the height which is not the same thing as the strength of the material.

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Brock Poling
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PostPosted: Mon Jul 16, 2007 4:41 pm 
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[QUOTE=Jim_W] Todd is pointing out a very important point, the stiffness is what increases with the cube of the height which is not the same thing as the strength of the material.[/QUOTE]

You're right... inaccurate choice of words.


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bob J
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PostPosted: Mon Jul 16, 2007 10:40 pm 
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First name: Bob
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Status: Amateur
Thanks for all the great info!!


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