You can also rent concrete saws at most rental stores.

Also concrete blades on skill saws can cut through basement ok but I find
that cutting more than an inch or so with an electric saw to be a pain.

With either set up a several square foot hole for a pier could be cut.   Not
as neat as the hole saw but potentially less expensive


Tom Schmitt

tschmitt@...............
----- Original Message -----
From: BOB BARNS 
To: 
Sent: Tuesday, August 01, 2000 1:35 PM
Subject: Re: Questions from a beginner


> Larry Conklin,
>   I also have my seismometer on a basement floor which is flexible.  As
> a suggestion (I have'nt tried it):Find a contractor who can use a
> diamond core drill to drill 3 holes, spaced like the feet on your
> seismometer, thru the floor with a diameter of 2 to 3".  Drive smaller
> diameter pipe thru the holes into the ground beneath but don't let the
> pipe touch the basement floor.  Mount the seis on top of the pipes.
> As a wild guess, the cost of the holes might be less than $200.

Material cut

> > My other problem is a basement floor that is about as stiff as a
trampoline.
> > Haven't been able to find a spot that is immune to people walking on the
> > floor above.  Short of buying a new house or pouring concrete in the
back
> > yard, I'm probably stuck with that one.
> >
> > I'd appreciate anyone's comments or suggestions.  I'm having fun, but
have a
> > lot to learn.
> >
> > Larry Conklin
> > lconklin@............
> >
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