Cutting Concrete for ground anchor installation

[600rob]

Hi guys
I want to fit one of these in a garage.

http://www.yanchor.com/y-max 901.html

The installation requires a sizable hole to be cut in the floor, which in this case is concrete. The garage is built on to the side of a house and is around 25 or so years old.


Does anyone have an idea of how deep the concrete might be? And if I might encounter things like reinforcing steel etc?

Ive got a 9inch angle grinder with some diamond blades but Id like an idea of what im up against before hand so i can rent the required tools if need be.

Years ago I remember trying to drill 4 holes in concrete to fit a bolt down anchor and it took several drill bits and pretty much killed my hammer drill so imagine this will require a similar amount of swearing and pain!

 

[Nige F]

. Better to hire a electric road breaker for c.£52 or hydraulic one for c.£75 these are Jewson Online prices. Keep your 9 incher in case you need it the grinder will fill the place with dust so just go straight into the concrete- protect your eyes and ears !

 

[foxhole]

You might be able to hire a core drill to cut a hole large enough to drop the anchor into.

 

[600rob]

Thanks for the suggestions guys.

So how deep do you reckon the concrete could be? is there a standard depth for garage bases or is it anyone's guess?

Bearing in mind i would plan to install this fairly close to the wall would a road breaker make a fairly clean hole or would it be likely to crack the surrounding concrete?

do you reckon this would be up to the job?
http://www.hss.com/hire/p/breaker-te700-medium-duty

or go for a bigger one?

 

[foxhole]

Breaker will make a big hole, concrete will be a minimum of 100mm thick , possibly 150mm.

 

[Burnerman]

Personally I'd chain drill the perimeter you need using a hired SDS drill/breaker (10mm holes would be ok) and then use the breakers chisel to get out the concrete. The Hilti tool would be fine for this work.
John

 

[600rob]

Personally I'd chain drill the perimeter you need using a hired SDS drill/breaker (10mm holes would be ok) and then use the breakers chisel to get out the concrete. The Hilti tool would be fine for this work.
John

yes i was also considering this method. i might try this instead of the other approach

 

[600rob]

something else i though of was that the concrete floor will probably have some sort of DPC installed.

When i drill/cut through the base i would need to replace this with something similar prior to installing the anchor.

I was thinking something like a bitumen based liquid dpc.

assuming i cut right through the concrete base, what then would be the best way to line the hole with the liquid DPD?

I surely couldnt just apply it to the dirt or whatever is under the concrete could i?

 

[Burnerman]

Once the hole is dug, just clean away the loose debris and line it with thick polythene, tucking it up the edges a bit should do the trick.
This is what I did years ago when I did mine -no problems at all.
John