I'm in a California (Bay Area) house built mid to late twenties.
I have an abandoned furnace pipe that is about 8" to 10" in diameter
which has a clay pipe on the inside wrapped in galvanized metal. The
pipe sits on the floor of the basement and extends through our single
floor and exits the roof through just a framed in dead space in the
living area. That is, it's not inside a brick chimney.
It's put together in sections about three feet long and it looks like
they are only connected by a slip joint. I'm told the sections weigh
about 90 pounds each.
Does this sound right?
What I'm not clear about is how the clay liner pipe is connected to
the outter galvanized metal wrap, if at all.
Anyone have experience removing these?
I'm having the roof replaces and the pipe goes up through a false
chimney that we plan to remove.
I've had a number of furnace contractors comment about it -- a few of
which were sure it was not clay lined (which is it). A few have
suggested knocking out the bottom section one by one and letting the
pipe fall. Sounds like a bad idea.
Another contractor suggested cutting two 2x4 boards just a bit larger
than the inner diameter of the clay pipe. Bold them together in an
"X" and insert the thing into the inside of the pipe at an angle so
that when pulled with a rope or chain from the center it wedges itself
and can be used for lifting a section.
There's about 1" or so between the inner clay pipe and the outer
galvanized metal wrap, so another idea was to drill maybe four holes
around the outside of the middle of a section and use hooks connected
to cable or chain to use to grip the section.
I had an asbestos contractor look at it and they did not belive there
was any asbestos in the pipe.
Any suggestions for how to remove this pipe? I'm looking for ideas
how to best grab each section, ideas for lifting, and what to do if
the sections are bonded from years of sitting there. I'd rather not
drop a section through the living room ceiling.