They are widely available. And the install tool is cheap. When installed are flush or slightly recessed. One would want to thread a headless bolt into them when not being used to keep cruft out. I’d go with anchors for 1/2 bolts with an antisense just for the durability of repeated removal.
You could use those Sammy anchors too. One would just need to drill a shallow 7/16 hole for the “head” to fit into so it would be flush and rig up a driver with a bolt and a couple nuts to set them from the inside theeads instead of using a wrench on the outside.
That Tapcon video was super helpful, I was absolutely going to under size my holes for the Sammy anchors that I have
@Melvin have you used those drop in anchors? The idea of pounding them into me seems like they could end up being lose, but they do seem to be widely used and liked and the pull out strength numbers are impressive.
Also, commercial buildings with high floor load ratings too. They may only have the warnings on the construction prints. @bar where are you planning on doing this?
I gave it a shot today with the Sammy’s anchors that I already had and other than the fact that they leave a bump that protrudes when they aren’t in use, they work great.
I don’t have a garage right now so it was just in my driveway which I am absolutely positive is safe to drill holes in
Edit: full disclosure I didn’t cut that M outside, that was done earlier on the other frame. It was just a piece of plywood that I had laying around so I threw it down to play around on.