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 Post subject: X-brace height
PostPosted: Wed Sep 05, 2018 1:26 pm 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Mon Jul 27, 2015 8:21 am
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First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur
Hello,

I made an adjustment to the jig I’ve been using to make the x-brace and didn’t catch that the result is 12.5mm height at the center instead of the 14.5mm I had been using. It had to do with how much of the brace was exposed in the radius jig which caused it to be shorter.

There are a lot of factors here, but I wonder what some of the typical heights are that you end with after voicing your tops? Is 12.5 (roughly 1/2”) asking for implosion city?

FWIW, I use 12.5 for the tonebars usually.

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I think I’m asking for trouble and will likely just make a new jig that gets me back to where I was before. In any case... thoughts?

Brad




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 Post subject: Re: X-brace height
PostPosted: Wed Sep 05, 2018 1:44 pm 
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Joined: Mon Apr 16, 2012 12:47 pm
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First name: Jay
Last Name: De Rocher
City: Bothell
State: Washington
Based on Martin and Gibson dreadnought plans, my x-braces are 5/8" tall at the X for dreadnoughts. X-braces for my smaller body guitars are 1/2" tall at the X.

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These users thanked the author J De Rocher for the post: bcombs510 (Wed Sep 05, 2018 1:45 pm)
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 Post subject: Re: X-brace height
PostPosted: Wed Sep 05, 2018 3:47 pm 
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Brazilian Rosewood
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Joined: Fri Dec 14, 2007 3:21 pm
Posts: 3291
Location: Alexandria MN
Yep, 5/8 for dreads and OM/000 and 1/2 for size 2’s.

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These users thanked the author Terence Kennedy for the post: bcombs510 (Wed Sep 05, 2018 5:40 pm)
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 Post subject: Re: X-brace height
PostPosted: Wed Sep 05, 2018 4:08 pm 
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Koa
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Joined: Sat Jan 19, 2013 7:33 am
Posts: 1831
First name: Willard
Last Name: Guthrie
City: Cumberland
State: Maryland 21502
Zip/Postal Code: 21502
Country: United State
Focus: Repair
Status: Semi-pro
The D-35 x-bracing is 1/2"x 5/16"...essentially 000 bracing for the back and 00 bracing on the top. They seem to hold up about as well as most of the other 1960's and 1970's versions of the dreadnaught.

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These users thanked the author Woodie G for the post: bcombs510 (Wed Sep 05, 2018 5:40 pm)
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 Post subject: Re: X-brace height
PostPosted: Wed Sep 05, 2018 7:49 pm 
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Joined: Sat Jan 31, 2009 8:50 pm
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Location: Seattle WA
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Same as JD and TK. It's all part of the system though. Where does your scallop start, how aggressively you thin them, Bridge plate, xcap, etc.

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These users thanked the author Pmaj7 for the post: bcombs510 (Wed Sep 05, 2018 9:49 pm)
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 Post subject: Re: X-brace height
PostPosted: Thu Sep 06, 2018 11:31 am 
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Brazilian Rosewood
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Joined: Sat Jan 15, 2005 12:50 pm
Posts: 3869
Location: United States
I tend to end up with the X braces about 1/2" at the crossing on six strings, more or less. A lot will depend on how thick you make your top, and the wood, of course.



These users thanked the author Alan Carruth for the post: bcombs510 (Thu Sep 06, 2018 11:41 am)
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