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Jim K[_3_] Jim K[_3_] is offline
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Default DIY Concrete screws

On May 27, 6:34*pm, Grimly Curmudgeon wrote:
In my local supplier, they have concrete screws...http://deckrepairhq.com/wp-content/u...rete-Screws-15...
At three quid a pop.
No wucking fay, am I paying that for a fecking bolt, especially if I
want 12 or more.
I recall a couple of years ago, the same supplier didn't have concrete
bolts, but had these...http://www.china-tiantian.com/upload...9211551460.jpg
And I'd used a couple of them to see if they bolted into concrete well
enough. They did, so I repeated the experiment today and drove one of
the 3quid screws into its 12mm hole (quite easy) and drove one of the
coach screws into its 10mm hole (a lot tougher) and it held ok.
A pneumatic impact hammer was needed for both, though.

The difference in price? The coach screws are less than a quid each.


mmm try fixing something worth fixing to the concrete with both types
and share the results?

I;d expect the proper (massively overpriced) concrete screws to cut a
better sharper thread in the concrete and so grip better than a forced
in coach bolt - that, I;d expect, got worn out & mangled during the
"pneumatic impact hammering" stage...

Jim K