On 07/08/2015 2:26 PM, Curt Raymond via Mercedes wrote:
Umm. I'd submit that either you don't have a very good jack (you're sure its a 20 ton and 
not a 2 ton? 2 ton bottle jack is maybe 3" in diameter, 20 ton is more like 6") 
or you've got a very heavy cottage.
Maybe 13 years ago the floor in my grandmother's house was sagging really bad 
under the fridge. We cut a 6x8 hole in the floor and found a broken beam. We 
sistered 2x8s on to both sides and jacked both broken pieces into place, then 
ran bolts through the 2x8s and the other piece of beam, put another 2x8 under 
it and fashioned a post under that. All the jacking for that job was done with 
a 5 ton bottle jack since we couldn't find the 20. My grandmother's house is 
quite large, 2 stories with high ceilings, built around 1850 if I remember 
right. We weren't lifting the whole house on that job but the fridge backed up 
against an interior wall which had settled a bit more than an inch so we were 
lifting the interior of the house. You could also see some bow come out of the 
ceiling. That one we lifted over two days. Had to cordon off the hole in the 
floor lest somebody forget and stumble into it on the way to get a drink of 
water in the night.

I have 3 or 4 of the 20 ton jacks.
They are 6 inches or more in diameter.
I have one here in the city in a press and 3 more out at the lake.



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