Drilling into concrete fence posts
Snowman
plan is to fix wooden rails horizontally near the top and the bottom and to
fix the trellis to this. Do I need to take any special precautions when
drilling and plugging the concrete posts?
Peter.
David W.E. Roberts
"Snowman" <sno...@anISP.com> wrote in message
news:2qD0c.2319$zu.655@newsfe1-win...
If they are like my fence posts they are reinforced concrete i.e. a lot of
iron inside them.
I have never tried drilling into them but I suspect that a masonary drill
would have major problems with the iron reinforcing, and a high speed twist
drill would be blunted by any concrete.
Also beware if they contain largeish stones (depends on the concrete mix)
because these could come out completely leaving a crater.
Sorry about all the negative comment - I am trying to think of an
alternative way to do it but failing at the moment.
Probably best to use the smallest drill and plug possible to give you a
change of getting in between the reinforcing ironwork.
HTH
Dave R
John Rumm
Never tried them but these may help:-
http://www.screwfix.com/app/sfd/cat/cat.jsp?cId=100176&ts=48594
I drilled a series of 5mm holes in various gravel boards at the base of
a fence the other day using an ordinary SDS masonry bit - seemed to work
without any problem. It may have been I was lucky and missed all the
rebar though ;-)
--
Cheers,
John.
/=================================================================\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\=================================================================/
Harry Bloomfield
You might find the concrete extremely hard, difficult to drill and
reinforced with steel. Try to fasten the trellis with some wire first
and if you can't do this check where the steel is located in the posts
with a metal detector. Try to avoid fixing too close to the edges, as
it might burst the concrete out as you tighten the fixings.
--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.org
Mark S.
wrote:
If you've an sds drill then no problem. Drilled onto the tops and
sides of some gravel boards and posts to fasten my panels to them with
no problems apart from the one gravel board where I went at an angle
and a bit chipped off the back... ;-)
They don't have "that" much reinforcing in them - they are making them
to sell at a profit after all.
Mark S.
PoP
wrote:
>I want to fix some trellis over a fence which has concrete fence posts - my
As others have indicated, drilling these concrete posts is likely to
prove troublesome. They are harder than a bully brought up in the
Bronx.
From what I recall these concrete posts may come with two attributes
which might help you. First, they might be slotted to take a fence
panel. Second, they may have holes right thru to take a bolt or wire.
Easy to see if that's the case.
PoP
---
If you need to contact me please submit your comments
via the web form at http://www.anyoldtripe.co.uk. I'll
probably still ignore you but at least I'll get the
message..... :)
Sam
"Snowman" <sno...@anISP.com> wrote in message
news:2qD0c.2319$zu.655@newsfe1-win...
If these are the concrete "H" posts which have the panels slide down into,
and they are like the ones we have, then the reinforcing is two steel rods
down the middle. If you drill to the side of the center - towards where the
panels sit then you will probably miss the rods. We haven't done this yet -
we need to do loads soon to support plant wires. I think gentle use of an
SDS will do it fine. If you hit something that won't drill then try
somewhere else - there should be somewhere thick and strong enough to take
plug within the post. SDS is the way to go when drilling concrete - it saves
hours.
Sam
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.592 / Virus Database: 375 - Release Date: 19/02/2004
Jerry Built
>
> I want to fix some trellis over a fence which has concrete fence posts -
> my plan is to fix wooden rails horizontally near the top and the bottom
> and to fix the trellis to this. Do I need to take any special precautions
> when drilling and plugging the concrete posts?
Nowhere near as hard as made out, especially if the posts are
new-ish. A drill with hammer action and a 6mm TCT bit is fine.
The re-inforcing is positioned appropriately to resisting
bending of the post, so just don't drill near the corners!
A TZ p ost has wire re-inforcing near the corners, about 10mm
in, and a slotted one has them in the shoulders around the
slots, so as long as you drill holes near the middle, you'll
be OK.
J.B.
dave
rather than drill the post?
Dave
"Sam" <s@.com> wrote in message news:c20ljq$kks$1...@newsg4.svr.pol.co.uk...
Paul King
news:2qD0c.2319$zu.655@newsfe1-win...
Why can't you use timber battens on "your side" of the fence as standoffs,
and put the trellising onto that? No one can object to it - no matter "who"
paid for the fence in the first place - all party fences are joint owned
(assuming that this *IS* a party fence - mine isn't! It completely stands
100% on my land and stood a preliminary legal test!). If the fence is in too
poor a condition to take the battening then it should be replaced in any
case!
--
paul....@theobviousdsl.pipex.com
Reply address is spamtrapped. Remove theobvious for valid e-mail address