gdguarino wrote:

For the uninitiated, a cajon is a percussion instrument, essentially
a wooden box with one thin side and a hole in the opposite side. I'm
a keyboard player, but have recently developed a hankering to dabble
in percussion. Plus, I have a pile plywood scraps lying around.

I've seen various plans online, and I'm sure that there are any
number of sound-related variables to consider, but I'm mostly here to
ask about structural strength.

One plan I saw calls for a box 12"x12"x18" tall, made with 1/2"
plywood. The wrinkle is, one plays a cajon while *sitting* on it. And
some of us wanna-be percussionists have put on a few pounds over a
lifetime. I'm wondering about the strength of what is effectively a
five-sided 1/2" ply box (the front side is made with very thin ply,
maybe 1/8")for say, 250 pounds. Will it need corner braces? Or 3/4"
ply?

Who da thunk the lid off a Brinkmann smoker and a big breasted gal
with legs spread across a wooden box could sound this good!

https://www.youtube.com/watch?v=K0s6sxxNG-I