I bought some 3/8" x 3" sleeve anchors for a fence i'm installing. This is very hard concrete from a building ledge; the holes cannot be drilled with a regular hammer drill.
So we drilled 3" holes for these sleeve anchors, and before installing them I double-checked to make sure that the hole depth was correct.
I start hammering it so that it goes in, but after a certain point, it doesn't move anymore. From the sound of the hammering, I know the anchor sleeve won't budge.
Why is this happening and what can I do so that it doesn't happen again?
The problem is that there's no way to remove it.
This is what it looks like. There's about an inch there, and I know for a fact that the hole is 3" deep: