OT- timber staircase

Check out this page, the third picture down, I think. No through mortises, but wedges that can be tightened.

Eide

Oops, see previous post...

Lee valley has some 1/2" versions but are rather expensive ($30/4) but they would not be to hard to make if you have access to a drill press or mill. Stainless would be nice but I think you could get away with steel or even aluminum for this use

I had an application several years ago on a camping trailer where the pull out bed supports hooked into a cleat held on by two bolts screwed into "T" nuts, that is except for one, which was secured by long wood screws into the edge of the plywood counter. My solution to the problem when these threatened to pull out, was to drill through the counter and install hardwood dowels for the screws to thread into - never came loose again, in fact, I suspect that the screws would have failed in tension first. Gerry :-)} London, Canada