Buy the lift. It is probably an excellent opportunity. You have two
options for the floor. #1 is to saw cut a rectangle and pour that
section deeper after doing the calculations to size it. However, if it
were me doing it for myself without anyone to answer to or create a
liability situation, I would do the following: #1, drill a hole in the
floor where each post is going. Carefully and slowly to determine how
thick the floor really is. It could just as easily be 5" as 3" thick.
#2, If it is at least 4", then buy some 1/2" steel plate and weld it to
the bottom of the lift to make a larger base plate. As long as the load
is spread in the floor to minimize a concentrated point load, you will be
fine. Locate the new anchor bolts further apart and you're good to go.
GPD4
On Tue, 28 Oct 2008 09:39:47 -0500 Jim Stone <jandkstone99@msn.com>
writes:
> My garage was designed with high walls and a cathedral ceiling to one
> day
> accommodate a home lift system. I don't need one just yet, but am
> always
> keeping my eyes open for a bargain that would make me pull the
> trigger faster.
> There is an auto shop closing about a mile from my house and they
> are selling
> their 10,000 lb commercial lift. It is far more than I will ever
> need, but
> they are currently asking $1000 and need it gone by tomorrow, so
> they would
> probably take less. However, I just checked the architectural plans
> on my
> garage floor and here is what it says about the floor:
>
> 4" concrete slab with 6 x 6 x W1.4 x W1.4 W.W.M. on gravel fill as
> required.
>
> I don't understand anything after "slab", but this doesn't seem like
> much to
> me. Should I forgo the commercial lift at any price? Will I be ok
> with a
> lighter weight one? It only needs to be able to lift and store a
> Sunbeam
> Alpine, so 10,000 lbs is way overkill.
>
> Thanks.
>
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