JEM neck dimension

[Metallion]

I have some maple scarf joint necks ibanez JEM style and wounder if the current dimensions are sufficiently strong. The scarfs have an angle of ca 13 to 16 dgr.

I was going for the JEM dimensions, wich is 19mm thick at 1st fret, 6mm board + 13 maple, 14mm headstock at 14 dgr angle. 

If the maple would continue more under the nut and headstock it would be stronger, and volute could be added. 

If I glued in more maple wood in this wedge space, would it add anything, or is the current material enought?

Edited September 17 by Metallion

[henrim]

If the joint is good it quite possibly holds up ok. But I think the joinery angle is quite steep.

Here’s a neck that has about same dimensions. I believe this was 19,5mm at the first fret, but in the same ballpark. I drew a line where the glue line is as it wasn’t really visible in the photo.

Adding stiffness in your case is not trivial without making the neck thicker. A glued piece below the nut doesn’t really add any structural strength. You you could laminate a longer piece to make a sandwich structure, but that would either make the neck thicker or you would have to first shave it thinner and then add a laminate. In that case you would likely cut into the truss rod channel.