please advise ---X-brace notch

[Dean C. Wilson]

By redesigning the notch in the X-brace I have doubled the breaking strength of the braces at the intersection. Is this of any value or is the regular notch more than adequate. Am I wasting my time by trying to improve the stiffness of the area of the X-brace, or should I just stay with the regular Martin design.

[Mark Tripp]

Without seeing the redesign, it is difficult to comment on it...

I've always used a standard lap joint, and have always capped it with a small (1/16" thick) strip of spruce. Many of the more well known makers also do this. It's remarkable how much strength and stiffness this adds to the joint. This gives strength where it is needed, without adding extra weight to the bracing scheme, and allows for more flexibility when voicing the top. I like to start from a point of as "stiff" as I can get it, without being bulky or overweight. If I am starting with a structure that is stiff, I just have more options in the way I voice, as I tend to build with (comparably) light bracing structures and tops.

I guess I'm saying that stiffness in that area is a good thing...

-Mark