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Posted by: Dr Evil Jan 26 2021, 01:10 PM

I finally got my own two post lift for this shop. I live near a distributor and it was fair priced so it was a simple matter of prep and pay. The old barn that now houses EvilWerks has a floor that was supposedly poured in 1974, per the marks left attesting to such. However, its a barn, and it is a hodgepodge of things so I was not confident in the thickness of the concrete when I drilled a few pilot holes to check thickness. So, new footers were done.

Measure out locations, and mark 3x3' spots.


With the hose running, and using the saw my new neighbor was able to lend us, cut on the lines.


Beat the hell out of the cut section, find out that there is one 2" floor poured over another variable depth floor. Feel good about decision to pour new footers.


Drill holes into existing floor and epoxy rebar, lash screen to rebar.


Mix and pour concrete. Messy job all around, but worth it and cost maybe $300 for rental of a mixer and supplies. Neighbor also had the epoxy so didnt have to buy, as well as some rebar.


Install 9000# Triumph lift. This one is the one that fit. Still needs to be wired up, but I have not had time. Now, I can have customers drop off their car and I can remove and install, test, etc here at home.

Posted by: 914Sixer Jan 26 2021, 01:59 PM

All right, your getting there

Posted by: 914forme Jan 26 2021, 07:15 PM

Contact for the distributor, I need a new lift.

Closest one I knew was Greg Smith over in Indy

Posted by: AmjadY Jan 26 2021, 07:37 PM

Very Nice. Congrats on the lift. You will love it! and smart decision on the re-pour of the concrete.

Jed

Posted by: Dr Evil Jan 26 2021, 07:43 PM

https://nationalautotools.com

Posted by: Spoke Jan 26 2021, 08:19 PM

Looking good. How deep did you make the concrete footers?

Posted by: FourBlades Jan 26 2021, 08:23 PM

Very nice!

Posted by: Dr Evil Jan 26 2021, 10:28 PM

8"

Posted by: AZBanks Jan 26 2021, 10:50 PM

Very Nice! Congrats

Posted by: 76-914 Jan 26 2021, 11:05 PM

Mesh to rebar? Why not rebar to rebar?

Posted by: horizontally-opposed Jan 26 2021, 11:27 PM

Looks good. Two-post lift…the stuff of dreams to many a weekend hobbyist, this one included.

Posted by: wonkipop Jan 27 2021, 05:51 AM

because you cut the mesh out to cut the hole in the concrete. it goes out with the concrete you cut out.

the rebar you can see are "ties" epoxied into the slab to tie the new mesh in the new pads to the old slab.

no other way to do it.

very similar to how you tie two separate concrete slab pours together.
though they often weld or tie the mesh to those rebar joiners.
and the joiners are often more a tube with a bar slipped inside.
but its hard to do that with an existing slab

its done properly. it will work. the pads look big enough.
though my engineer would probably make me do pads about 450mm deep.
foot and a half.
but engineers do like to use a lot of concrete.

does that make sense.

Posted by: 930cabman Jan 27 2021, 06:04 AM

You have 3'x3'= 9 square feet at 8" thick, all is good. How long will you let the new concrete cure?

Posted by: Dr Evil Jan 27 2021, 11:37 AM

It cured for two weeks or so over the holidays waiting for installers for the lift. I wasn’t in a rush. The company said I needed only 4.5”, but I didn’t like that. 8” better and not all that much more.

Posted by: 76-914 Jan 27 2021, 11:52 AM

I've cut a lot of slabs and whenever we cut one that has rebar we tie rebar back into it. We drill 3" deep holes midway into the concrete walls angled slightly down, insert a piece of rebar about long enough to reach 3/4's the span of the cut then bend it down until horizontal. The same is repeated for the opposing side. Then the 2 pieces, now running alongside one another, are tied together with wire. This is repeated @ ~12" intervals. No epoxy. We do the same when cutting across driveways as they are load bearing. Even if the original pour used mesh. I suppose you can get away with using mesh if the soil is stable. Cheers!

Posted by: Root_Werks Jan 27 2021, 03:16 PM

Now that is done right! How cool!

Posted by: TonyA Jan 27 2021, 03:57 PM

Looks good to me. I liked all the comments on re-bar and mesh so I had to put my 2 cents in also. It all doesn't mean squat if the concrete in mixed way to wet, it will just flake off the top and just crumble away.

Posted by: bigkensteele Jan 27 2021, 05:35 PM

Did you move again, or is that a separate property from your house? What ever happened with the garage you were wanting to build?

Posted by: 930cabman Jan 27 2021, 05:48 PM

It's all engineering and it sounds as though you had one. From my perspective, I may have NOT connected the existing slab. Let the slab move around and let the foundations for the lift stand alone with an expansion between. Only .02

Posted by: 914forme Jan 27 2021, 06:58 PM

Thanks for the link I found them.

4 post for me if I get a larger lift, my other German cars have some fill procedures that make me a bit uneasy when working under the car with it running, and 3 tons 7 feet in the air.