fencing post problem.

[fdz26]

Hi, hoping someone might have some good advice. I've been putting up a knee fence and everything was ok until I went to dig the last hole for a post. About 3 inches under the soil is a very large bit of concrete, far too big to remove easily. The top of the concrete where I want the post isn't very level or even so is unsuitable for a bolt down met post. My only ideas are to

Lay down a thin (3 inch) new bit of concrete on top of the big block and then use a bolt down met post,

Or

Try and make a hole in the concrete block, put the post in and secure it using post fix.

Any ideas?

 

[Burnerman]

Personally I'd drill down into the concrete lump and then burst it out with a big hammer and chisel.
John

 

[freddiemercurystwin]

Removal is likely the only long term solution. What is the concrete doing?

 

[noseall]

As per Freddie, make sure that this is not concrete protecting a drain pipe etc.

 

[fdz26]

I think its part of the drain as there is a cover about 10 ft away and it covers quite a large area.

 

[fdz26]

I did wonder if I could drill down and set for bolts/thread bar/ ground anchors in, level the surface off with cement and use a bolt down met post?

Its too large to dig out without a mini digger and if it is part of the drain I couldn't do it anyway.

 

[b3taman]

If it's only 3 " down, why not bolt a metpost base directly onto this concrete? You could do some exploratory drilling to see how thick the concrete is first, but if it IS over a drain as you suspect then it's likely to be fairly thick. How deep are the drains in the inspection chamber?

 

[fdz26]

Its definitely part of the drain just traced the concrete back to the cover.

The concrete is a bit jagged where I want to put the post. Could I use some kind of chisel to level it off ???

 

[honda]

An angle grinder would do it just to get a flat surface for the metpost.

 

[Bilabong007]

Hilti dd350. It's safe and cracking

http://www.bbc.co.uk/news/uk-england-london-32291526

Graeme

 

[Harmony1462]

I had a similar issue a few years back and I levelled off the concrete with an angle grinder