I've had terrible problems trying to knock cable clips cleanly into walls.
I'm talking primarily 4mm^2 T&E cable and correspondingly sized clips here.
Either they go in too easily (into mortar usually) and end up working loos
e in short order or they go in half way and then seize and buckle (against
brick/breezblock) and go all out of shape under further hammering.
Seems like a really shit system unless used to clip cables tight against wo
od, but if you know better, which no doubt many of you will, then kindly in
form me of where I'm going wrong...
primarily 4mm^2 T&E cable and correspondingly sized clips here. Either
they go in
too easily (into mortar usually) and end up working loose in short order
go in half way and then seize and buckle (against brick/breezblock) and
out of shape under further hammering.
but if you know better, which no doubt many of you will, then kindly
inform me of where I'm going wrong...
If the masonry is hard, use clips with proper masonry nails (Unifix) and
don't bash! Tap tap tap tap quite gently for a long time -- lot of taps!
It seems to break up the masonry better than a few bashes.
There's pinplugs of course, but another way is to drill a very small
diameter hole to a depth of perhaps 4 or 5mm, and drive the nail into
that so it only has to drive in beyond the hole depth. I don't know why
but that seems to work quite often.
However you do it, put a line up and make your holes/fit your
pinplugs/whatever before you start to fix the cable.
Another point - some bricklayers put very little mortar into perps
(vertical joints) - often just a thin pointing layer. If you're
hammering clips into the mortar, hammer into the beds (horizontal
[email address is not usable -- followup in the newsgroup]
Thanks for the feedback, gentlemen.
I'm most persuaded by Frank's suggestion. One can buy wooden dowel rods sev
eral meters long from the sheds for peanuts. It wouldn't take 2 minutes to
cut these down to the right lengths (say 15mm). Seems like a good idea. If
the dowel is a snug fit within the hole you drill in the wall,then banging
in a nail from a cable clip should expand it into an interference fit which
with any luck should be as secure as it gets.
On 04/08/2013 19:27, firstname.lastname@example.org wrote:
All depends on how you think about things.
10mm is only 5mm bigger than 5mm - and 5mm is quite small. So not very
10mm is twice the diameter that 5mm is. So very much bigger. Twice the size.
2.5mm radius hole has an area of about 19.63 square mm. A 5mm radius
hole has an area of about 78.54 square mm. So very very much bigger.
Four times the size.
None of them are anywhere near Crossrail size. So absolutely pifflingly
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