Quote Originally Posted by <MADDOG> View Post
Use a hammer drill for concrete, and you also need a set tool with drop in anchors.

Depending on your hole, you may be able to use Red-Heads.

http://www.itwredhead.com/product.ph...Wedge-Anchor-9
That is exactly what I ended up with, and worked perfectly for the two corners that I got bolted down. I didn't have access to a hammer drill and didn't want to rent one so I was just using a plug-in electric drill, which I figured would work perfectly just wouldn't be as fast as a hammer drill.

I tried finding an example of what I used and got stuck, but I can't find anything similar to it online. It was a smooth cylinder, tapped on top about 1/4" down there was a plug. The bottom was cut into 4 "leafs" that would expand as the plug was pushed down into them.