Hoist installation

07cob · #1 (**permalink**) 12-07-2012, 02:07 AM

All

Hoping to install a two post hoist in the new year. It will be installed on a slab that I have no idea about. Has anyone else done this and if so, how can I be sure the concrete is up to the task. I have considered cutting through the slab for the two bases and digging for some decent footings, tie in to existing slab and maybe even inset a bolt plate before pouring the boxes. Might sound like overkill but there must be a fair load at the base of the posts when lifting cars.

Thoughts?

Geof

renovationinnov · #2 (**permalink**) 12-07-2012, 02:48 AM

drill a couple of test holes to see what the depth of concrete you have
if you have under 100mm of concrete
do as you said above cut the cocrete & pour a decent footing
if 100mm or more drill your holes for the base & chemset your bolts in set your hoist up level & lock it down & there you go
have fun
ROB

Rog246 · #3 (**permalink**) 12-07-2012, 03:00 PM

the recommended min concrete is 200 mm from memory otherwise do as you suggested
Rog

razerwire · #4 (**permalink**) 12-07-2012, 05:38 PM

Don't know about mm but 5 1/2 inches thick is recommended with no cracks in concrete within 3 or 4 feet of where posts will go. Shim level and bolt down. I leaned post out 1/2 inch at top on my install, just because.

chucks1 · #5 (**permalink**) 12-07-2012, 07:11 PM

What about a 2-post unit like this one that is designed for concrete that is in less than ideal condition?

Torin Two Post Car/Truck Lift — 4 Ton Capacity, 137in.W x 144in.H, Model# QJY240B | Two-Post Lifts| Northern Tool + Equipment

Bernica · #6 (**permalink**) 12-07-2012, 07:38 PM

IMHO.....If I was doing it, for peace of mind I would sawcut the slab around 18-24" square and dig a footing aprox 18" deep. Then pour it back and embed your anchor bolts with a template to match your lift base. But that's just me.....I like peace of mind.

Merv and Sharon · #7 (**permalink**) 12-07-2012, 11:08 PM

Goeff I did one of these in 2011 and have been really pleased with the result. It makes work on the car so easy.

MaxJax Reviews -US

My slab was all concrete with no filler and quite thick enough. More than needed really. I used a large impact drill set that I have to make the holes. I also sent lots of time measuring ... Just be sure you don't hit the reinforcing rods. That can twist you, instead of the drill bit! The MaxJax has a quite large base and spreads the load well. The anchor bolts are most impressive and I couldn't find any bad reports on them. I have had a quite a few cars up on the hoist with no problems. 150mm is fine.

The agent is in Tingalpa and is very helpful. They have a large base in the US as well.

07cob · #8 (**permalink**) 12-08-2012, 12:39 AM

Bernica, I am indeed tending towards that solution. Maybe regardless of the concrete thickness. I doubt very much it would be more than 4" so this would be the only option. I'll drill it first and if it is 6" or more, I will consider both options.

Merv, the MaxJax sure does look the goods in restricted areas, but I am hoping to have the option to go for a clear floor two poster. Plenty of height to walk around underneath.

Geof

Bernica · #9 (**permalink**) 12-08-2012, 10:41 AM

Quote:

Originally Posted by 07cob

Bernica, I am indeed tending towards that solution. Maybe regardless of the concrete thickness. I doubt very much it would be more than 4" so this would be the only option. I'll drill it first and if it is 6" or more, I will consider both options.

Merv, the MaxJax sure does look the goods in restricted areas, but I am hoping to have the option to go for a clear floor two poster. Plenty of height to walk around underneath.

Geof

If you end up going that route and do footings, drill into the edges of the slab and insert 2 or 3 #3 (3/8") rebar "dowels" in each of the four sides with epoxy grout. Insert about 3" and have them protrude into the hole about 6". That will help spread the overturn load out across the slab as well as give you a solid base. That should do it. Good luck!

BMK · #10 (**permalink**) 12-08-2012, 04:06 PM

I know this discussion is regarding two post - but if you have not made a financial commitment consider the Tuff lift four post.

It is movable, very stable and well made.

I think they are near $3000. I have had mine for over 5 years.

Bernie.

07cob · #11 (**permalink**) 12-08-2012, 06:59 PM

Bernie

I have considered the four post but like how easy it is to remove wheels, access suspension, etc with the two post. With a new project just starting, I can see great tracts of time with no wheels and no suspension.

For storage, four is definitely the way to go. I might end up with one of each yet!

Geof