Official Luthiers Forum!

Hi,
This is my first time of using this bracing for the back and I need to know about how high to go with the bracing at the lap joint..... it is an OM size. Right now there about a 1/2 - 9/16 high.

Thank you,
Jeff

On my OLF-OM plans and in my builds I use 3/4" tall by 1/4" thick back X bracing. I thin to parabolic cross sectional profile and silhouette

Well...ain't that my luck!! I ask the question after there shaved down to the height they are now!!
I wouldn't have thought they would need to be at that height>

Thanks for your help....

Jeff

1/2" will probably fine.

I'm usually 9/16-5/8 in the lower bout, including the cap, and 1/2 in the upper bout.

_________________
Ken Franklin
clumsy yet persistent
https://www.kenfranklinukulele.com

Has anyone use scalloped bracing identical to the top on the back ??
As if it was another sound board ??
Any thoughts ??

Gregg

_________________
Gregg

Looking good jeff .. but I dont see the point is adding another X up top thats that closed, and so close to the rim edge (at the cutaway for sure) - that area of the top is now very stiff, which will inhibit the upper back movement and detract from bass response IMO. I would think you could eliminate half the X, and just keep the other angled cross bar (the one that goes away from the cutaway) - I do that all the time on florentines ...

my 2 cents ....

_________________
Tony Karol
www.karol-guitars.com
"let my passion .. fulfill yours"

I agree with Tony that with a cutaway the upper x is not as necessary, but I use it anyway. My theory is that it helps keep the back from flattening which may be a contributing factor to the need for neck resets. I haven't heard a lesser bass response in my instruments compared to ones I've ladder braced.

_________________
Ken Franklin
clumsy yet persistent
https://www.kenfranklinukulele.com