***** Guitar Project Jigs, Tools & Techniques Online Resources Archives OLF Video Page Library of plans MP3 Library Inlay Class
Offical Luthiers Forum





And our community proudly sponsored by:

RC Tonewoods | Stewart MacDonald | LuthiersForum
TasmanianTonewoods | OLF | OLF MERCH
Luthier Suppliers | Pacific Coast Woods | ELEVATE
OLF X | Tasmanian Acoustic Tonewood | Luthiers Forum Store!
Luthiers Forum | OLF Facebook | AVAIL SPACE
OLF | Alaska Specialty Woods | A.Hix Tonewood
Duke of Pearl | Birkonium CNC | Space




Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sun May 25, 2025 4:34 pm


Board index » Forum Archive

All times are UTC - 5 hours





Post new topic Reply to topic  Page 1 of 1
  [ 14 posts ] 
  Print view Previous topic | Next topic 
Author Message
bob J
 Post subject:
PostPosted: Sun Jul 15, 2007 11:20 pm 
Offline
Koa
Koa

Joined: Sat Feb 12, 2005 6:20 am
Posts: 1437
First name: Bob
Last Name: Johnson
City: Denver
State: CO.
Zip/Postal Code: 80224
Country: USA
Focus: Build
Status: Amateur
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,
Top
 Profile  
 
tippie53
 Post subject:
PostPosted: Sun Jul 15, 2007 11:25 pm 
Offline
Koa
Koa

Joined: Thu Feb 17, 2005 3:38 pm
Posts: 1542
Location: United States
   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
Top
 Profile  
 
Kim
 Post subject:
PostPosted: Sun Jul 15, 2007 11:44 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Aug 18, 2005 2:21 am
Posts: 2924
Location: Changes when ever I move..Australia
Focus: Build
Status: Amateur
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
Top
 Profile  
 
Colby Horton
 Post subject:
PostPosted: Sun Jul 15, 2007 11:58 pm 
Offline
Koa
Koa
User avatar

Joined: Fri Jan 14, 2005 2:01 am
Posts: 542
Location: United States
This is an interesting idea.


Top
 Profile  
 
Colin S
 Post subject:
PostPosted: Sun Jul 15, 2007 11:59 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Jan 06, 2005 7:29 am
Posts: 3840
Location: England
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

_________________
I don't believe in anything, I simply make use of a set of reasonable working hypotheses.
Top
 Profile  
 
JJ Donohue
 Post subject:
PostPosted: Mon Jul 16, 2007 12:05 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Mon Dec 27, 2004 3:50 pm
Posts: 4662
Location: Napa, CA
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.

_________________
JJ
Napa, CA
http://www.DonohueGuitars.com
Top
 Profile  
 
Brock Poling
 Post subject:
PostPosted: Mon Jul 16, 2007 10:12 am 
Offline
Old Growth Brazilian Rosewood
Old Growth Brazilian Rosewood
User avatar

Joined: Mon Dec 27, 2004 1:20 pm
Posts: 5915
Location: United States

Remember... the strength increases linearly for increases in width and x^3 for increases in height.

_________________
Brock Poling
Columbus, Ohio
http://www.polingguitars.com
Top
 Profile  
 
Jim Watts
 Post subject:
PostPosted: Mon Jul 16, 2007 2:39 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Thu May 12, 2005 5:46 am
Posts: 2992
Location: United States
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.

_________________
Jim Watts
http://jameswattsguitars.com
Top
 Profile  
 
Brock Poling
 Post subject:
PostPosted: Mon Jul 16, 2007 4:41 pm 
Offline
Old Growth Brazilian Rosewood
Old Growth Brazilian Rosewood
User avatar

Joined: Mon Dec 27, 2004 1:20 pm
Posts: 5915
Location: United States
[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.


_________________
Brock Poling
Columbus, Ohio
http://www.polingguitars.com
Top
 Profile  
 
bob J
 Post subject:
PostPosted: Mon Jul 16, 2007 10:40 pm 
Offline
Koa
Koa

Joined: Sat Feb 12, 2005 6:20 am
Posts: 1437
First name: Bob
Last Name: Johnson
City: Denver
State: CO.
Zip/Postal Code: 80224
Country: USA
Focus: Build
Status: Amateur
Thanks for all the great info!!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 14 posts ] 

Board index » Forum Archive

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 23 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com