In message

nal-september.org, Tim+ writes
Jim K wrote:
On Sunday, 10 March 2013 17:21:57 UTC+1, Jim K wrote:
have a say 1m fence to construct atop a nice old curved low stone

built garden wall, gtopped with some nice old large bits of flattish

stone (think wall that had railings ontop before they were cut off for

the war).

The wall is also sloped so the fence will be hand built to suit - i.e.

not panels



Standard ways of attaching fence posts to masonry/concrete are pretty

foul bolt down jobbies that look naff and don;t last long IMHO. Also

drilling 4 holes is asking for bother on capping stones, and I expect

they won't cope with the slope well and will look even more naff...



So looking for a neat way of attaching wooden posts to sloping coping

stones...??



Sure I;ve seen some post "shoes" with a length (12"?) of rebar

attached vertically underneath presumably to concrete in - can't find

em now- was thinkinig I could drill the stones (and better down into

the wall) for the rebar and then use resin to anchor them in?



Any thoughts?

mmm OK then

found the things I was on about but they are designed for deck posts with
vertical loads and I'm worried they will not put up with much stress when
holding a 3ft (say) fence atop a wall in the wind. I think the febce will
have to be a "hit and miss" job with staggered pales each side to
allow some wind through..

SO
plan B:-
M12 Threaded stainless rod - post bottoms drilled to take 150mm of this
and 200mm protruding, attached with? resin? expanding foam? gorilla glue?

then wall drilled vertically and 200mm section anchored in with resin?

Anyone see anything about this one?

I could maybe beef up the interface between wall and post (against
bending by wind or scrotes) by threading a 36mm long M12 bar connector on
to the stud (counter boring the post and wall by 18mm each)

Any thoughts anyone?

cheers
Jim K

I must admit I'd be very wary of adding a fence to the top of a wall.
Structurally they are working in very different ways and I wouldn't have
thought that it would take much wind load to risk damaging the wall. This
might account for the lack of replies to your question.

M12 doesn't take much to bend and I doubt the bar connector would add
much strength.

Some pictures would be a big help. Personally, I'd put posts in behind the
wall supporting the fence over the wall.

Me too. 75mm square and well fixed to the side of the wall.

--
Tim Lamb