Quote Originally Posted by aaxiss View Post
basically what I am doing is drilling a hole through the slab in the garage 1" in diameter then using a 3' long 3/8 wood auger bit I will drill down into the soil beneath the slab as far as I can go. then pound in a 1/2 5' copper rod with a 1" x 4" tigged on solid at the top that is tapped for a bolt. vibro-hammer it down till just the 1" part is visible then apply epoxy and vibro-hammer flush with the slab. I will do this in the center of the shop which should limit the legnth of the bolt ground cable to about 6' and reach anywhere in the shop.

Just my Idea for what it's worth. Helps being the son of an aerospace metals broker, I can get just about anything but mild steel for mill cost and tons of rems for free. Got Titanium?
Great idea. Still a little trip hazard if it's not recessed. Maybe recess the plate and then you can remove the bolt and put a rubber plug in it. Your idea will save on the ground lead cost and looks clean too.

I have a friend that owns and iron work factory. Drops are us. Only problem is he can't work with anything under 1/4", but works for me. He and the foreman there are great guys too. In a pinch, run out of argon or C25, call and run about 4 miles.