There could be a steel pan filled with concrete under the firebox and in
front of it. My gas pipe goes out the side and I think that is where gas
logs and inserts expect it.


"Larry Johnson" wrote in message
...
We have a woodburning fireplace we are converting to gas logs. I am trying
to drill a hole to accommodate the gas pipe through the floor in a front
corner of the firebox to a utility space under the house. I get through
the firebrick, about 3 1/2", and then hit something my carbide bit cannot
penetrate.

Does anyone have a suggestion how to detect what I'm hitting? Do they use
steel plate reinforcement in fireplace construction? Any help is
appreciated.