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PostPosted: Thu Oct 15, 2009 4:56 pm 
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Cocobolo
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Joined: Sat Feb 02, 2008 8:23 pm
Posts: 191
Location: West Scotland
hi all
further to your great responses to my “is a 12 fret MJ a stupid idea” question.
This is for my 2nd design project.
I have the Martin 000 12 fret basic sound board / sound hole and bracing position layout which I’m going to overlay onto my own body shape (with cutaway).
11 3/8 in Upper
9 3/8 in Waist
16 in Lower
20 in Length
Having searched the OLF archives extensively I see a lot advise 1/4W x 1/2H X bracing (non scalloped ala Hesh).
Question: would you go with this on a 16 in. body and 25.4 in scale length?.
yours Geordie

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PostPosted: Thu Oct 15, 2009 5:07 pm 
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Brazilian Rosewood
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I don't see a problem with 1/4" braces on a 16" body. I would be more concerned with brace placement and 12 fret on a big body...

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PostPosted: Thu Oct 15, 2009 5:17 pm 
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Brazilian Rosewood
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I've used them for years .
Just make sure the glue joints are perfect.

They will weigh less than a 5/16" brace so keep that in mind when carving and their final height.

Mike

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PostPosted: Thu Oct 15, 2009 5:28 pm 
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Location: Windsor Ontario Canada
First name: Fred
Last Name: Tellier
City: Windsor
State: Ontario
Zip/Postal Code: N8T2C6
Country: Canada
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My 16" lower bout Martin style Jumbo and the Wedge guitar based on the same outline both have 1/4" bracing, I start a little taller and tune them in. Both guitar sound real good and there are so far no issues, and I use the 12 to 56 light medium strings as I do a lot of lower tunings on the bass strings. I believe martin uses 1/4 bracing on the 3 pc back Dreadnought I think its the D35, I have seen some of them from the 70's and they are a little lifted behind the bridge but not enough to be a concern.

Fred

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PostPosted: Thu Oct 15, 2009 9:56 pm 
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Location: Ithaca, New York, United States
If your X braces are going to be 1/4" wide, I would make them taller than 1/2".

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PostPosted: Fri Oct 16, 2009 2:55 am 
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Brazilian Rosewood
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Location: Bucharest, Romania
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You first concern should be the quality of the brace stock. The European spruce I work can vary by some 15% or even more in density from one piece to the next.

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