On Wednesday, October 24, 2012 3:03:14 PM UTC-2:30, dadiOH wrote:
Bob F wrote:
Hanger bolts. Closet bolts are the toilet hold down bolts.

In lieu of hanger bolts, I'm currently using threaded inserts (T-nuts) to bolt the panel in place. +1 since the bolt head will always be the same distance above the surface of the plywood, regardless of how much the bolt is tightened.

I'm going to try C-channel along 3 sides (bolts remain on the 4th side) as a test to see if it will be secure enough. Simply remove those bolts and slide the entire panel out. Given that it is a small piece of ply I'm optimistic that it will be strong enough...if I see appreciable flex I'll go back to using bolts.

Apologies to those who didn't get my update on a 'climbing wall' application. I was trying to describe the problem in a generic manner so it might also be useful to others. I'm appreciative of the suggestions...I always learn something new when I post on this group.