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 Post subject: Garage lift for the car
PostPosted: April 7, 2019, 8:34 pm 
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Location: Denver Co
So I bought a C7000 portable car lift, removed the rafters and now ready to install. My question is, can I mount it close to the concrete seams? I'm trying to place it so that I can still have the wife park in the car. Ideally, I plan on creating two mounting sets and move it to the center of the garage for a big project.


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PostPosted: April 7, 2019, 10:57 pm 
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Most Garage floors are around 4 inches thick, You can probably mount it near the stress relief joints, because ideally there should be an 8" thick footing for each post. Or however the Instructions state the installation should proceed.


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PostPosted: April 7, 2019, 11:50 pm 
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Instructions for the one I had said that if possible you want it on a single slab.
Also said to avoid being near the edge if possible.
4" minimum thick slab, some cheapo builders floors may be as thin as 2". :BH:
If your slab is too thin or may be weaker since you are at an edge you can cut and dig for a purpose made footing.
Getting the lift square and in plumb is probably the most important.
That may require shims.

Wish I still had mine.

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PostPosted: April 7, 2019, 11:53 pm 
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Cut the cement,dig the pit and install them right !
It won't be you using them wrong. It will be the guy that buy's your home when you move. Or when your Wife sells.
Just my 2c's.

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PostPosted: April 8, 2019, 8:24 am 
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Those concrete "seams" are there to define where the concrete should break, if stresses are such that there will be a break. It provides a pre-defined weak spot in the slab. I would never bolt the lift across a line that is intended to move.

I would think that an asymmetrical lift would require a thicker slab than a symmetrical one. That is just a guess on my part. 4 inches just seems too thin IMO. Either style, I would check both your local codes and the mfgr's recommendations.

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PostPosted: April 8, 2019, 1:32 pm 
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Your lift looks similar to the one I installed in my shop. I drilled through the slab and measured the thickness where the lift would be mounted (5 1/2"). I didn't use the compression fittings that set in the concrete slab, Instead I used the eqivalent diameter althread rod about 2 " longer than the supplied bolts, set the columns in place drilled the holes, cleaned the mess, then set the columns in place shimmed for verticality with big washers. When satisfied, I put nuts on the ends of the studs leaving about 3 threads exposed, mixed a 2 part epoxy construction adhesive half filled the holes inserted the stud with a washer under the head, raise the stud to see if the adhesive is at the floor level (adjust as necessary). Waited 24 hours then torqued the nuts to the recommended torque. 10 years of service so far. Now, if I were going to do it again, would cut out the slab and pour a footer, not for strength, but because the cables that maintain the synchronized level of the lift arms run over the floor with a cable cover tray. It is ~1 1/2" high and 12 " across and for the past 10 years I have had to struggle to move carts and or equipment over it. Still it is the best tool investment I have made. Good luck with yours

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PostPosted: April 8, 2019, 9:58 pm 
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These guys dont seem to see an issue with it.

https://www.gregsmithequipment.com/2-Po ... stallation

My mfg doesn't have any suggestions on it either. I bet it's fine but I am going to keep looking.

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PostPosted: April 8, 2019, 11:01 pm 
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The link you mention does not give full approval. It has some caveats that indicate to me it may not turn out to be the best plan:

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HOWEVER, you will need to check (for the first 30 days) the anchor each time you use the lift to make sure it is still tight. After 30 days, you will need to check the anchor periodically. Once again, USE YOUR HEAD!


It is your garage and your lift. USE YOUR HEAD

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PostPosted: April 13, 2019, 2:10 pm 
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Yeah I'm at a loss. I want to just go for it but a new pour would be a forsure "its good". So I am thinking just go for it on the one side of the garage since the race car is so light and pour new pads in the center of the garage when lifting heavier cars.

there isn't a lot of room as it is so that is a different problem if I want my wife to park in the garage too.

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PostPosted: April 13, 2019, 5:36 pm 
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Not sure where the "Portable" bit comes in?
It will be bolted down, and is nearly impossible to move as a single piece, so in reality it is very unlikely it will ever get moved for heavier cars.

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PostPosted: April 13, 2019, 5:49 pm 
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It's really easy to move. I'm not to worried about that.

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