In message .com,
Peter C writes
Consdering installing a security post at the end of my tar-mack drive.
The type that I can let down.
There are two security posts on the market, those to cement in and
those using 12mm anchor bolts.
I have never used these bolts before ,so I presume you drill a hole
first. Considering thin layers of tar-mack, Are the bolts likely to
hold ? Or should I go for the ones that cement in ,thus making a mess
of the drive?


I put one in our old drive. Tarmac on a compacted sub-base, I can't see
that I could have sensibly bolted through into this securely - if it was
laid over on old concrete drive then maybe ok.

I used a sink in one. IIRC it required a hole about 12 inches square.
Concreted in upto a little below the surface and then patch with a bit
of cold cure patching tarmac stuff. Once the stuff had weathered it
wasn't really noticeable at all.

Problems -

1. finding a water or gas pipe and having to move the hole a bit to the
side.

2. Reversing out, down a sloping drive, you couldn't see the post, and
if you forgot it was there - bump!

I installed the cheaper of the two on this page:

http://www.saundersonsecurity.co.uk/...copic_Security
_Posts.html

--
Chris French