Concrete and lift question.

[Is this thing on]

Hello

The concrete pad has to be done. I only have room for a canvas type garage, To put beside the stick garage.
I plan on the maxjack lift.
I understand the pad needs to be so thick (6"?)
And a rated psi (need to look this up)
My question is how much concrete is needed past the post footprint?
example
So it the post are 8 feet apart, does the pad need to be 10 feet wide or 12 feet?
To give the concrete strength at the post outer edge , I am guessing the outer bolts holding the post takes much more of the loading than the inner, as the lift wants to become an A frame while lifting a vehicle.
I did not see anything about this on the maxjack site.

 

[493mike]

You could just add more rebar around the post areas to keep the size smaller. I'm no engineer but overkill is in my wheel house!
Mike

 

[Ilikeike]

what I found looking at their website

""Most residential or commercial foundations are strong enough to support a MaxJax lift. The minimum requirements is 2500-3000 PSI 4" thick concrete. Be sure to check your floor on the possibility of it being a post tension slab. In this case contact the building architect before drilling. Visually inspect the site where the lift is to be installed and verify the concrete is in good condition and free of cracks or other defects."""

 

[theegovernor]

A 3000 psi 4ft x 4ft x 6" slab for column is what is needed. The slabs need to be keyed into the concrete around with #4 rebar

 

[sreeb]

A 3000 psi 4ft x 4ft x 6" slab for column is what is needed. The slabs need to be keyed into the concrete around with #4 rebar

There is no existing pad. He wants to build a minimum size pad.

 

[Is this thing on]

There is no existing pad. He wants to build a minimum size pad.

Kinda,
The tube framed tin skinned garage is 16' wide by 20' long.
The maxjax example bay is 14' wide, that leaves 1 foot per side of concrete pad past the post.
I can add to the pad width if needed, if the post being only a foot from the pad edge will not be strong enough.
Or have the pad edges thicker, guess you'd call them footers. on the sides near the post. Say a 6" slab with the sides with post 8-10" thick 2' wide from edge. running the length of the pads 24'
If I pour a slab the whole 24x24 that I'd like, the town wants a foundation, as they assume a real garage will sprout up. on the pad/slab. And digging 4' foundation/footers isn't in the cards, As much as I would like the extra area to store stuff on.

 

[CraigStu]

I have no engineering back round at all but I'd prefer more than one foot concrete beyond the lift posts. Can you make the slab 16x20 to match the garage size?

 

[Milton Shaw]

Canvas type garages are not usually high enough to have a lift inside them. Most of them I have seen the sides are at most 7' and that is no even close to what you need. On the lift slab, I would check with lift mfg. to see the minimum size for the slab to keep it from moving with the weight off center that will occasionally happen. There is a lot of leverage when the lift is all the way up and the weight is to one end/side, it could tip and dump a pickup truck real quickly.

 

[WNYflyer]

Personally I would download and print out the spec sheet that shows the unit layout in plan. Then I would mark up the printout to indicate the dimensions you are looking for. Mark it up relative to the out/out of baseplate dimension for plan lateral dimensions and relative to the centerline of columns for plan vertical dimensions. Scan the mark-up in as .pdf and call the technical help line and inquire about an e-mail address you can send the mark-up to so they can fill in the dimensions and send it back to you. If you do not have the capability to scan the mark-up then talk to them on the phone and be prepared to fill in the required information on your mark-up yourself. Personally I would make every effort to send a scan so they have to mark-up it up and thus you have a record.

Also enquire about limitations on concrete control joints (if any) locations relative to the unit. Also confirm the required concrete strength and thickness so you have all your information in one place.

They should have that information readily available and hopefully they will work with you and get you your required information. If they give you a hard time I would be walking away.

P.S. I do this constantly for equipment installations where equipment drawings are missing important information. More often than not standard operation procedure and usually goes smoothly but occasionally some equipment vendors don't have a sense of urgency.

Good luck !

Below maybe the link to the unit are talking about?



https://www.maxjax.com/pub/media/downloads/MaxJax-M-6-Portable-Two-Post-Garage-Lift.pdfthe centerline of col