DIYbanter - View Single Post - 9mm -mutter, grumble....

Roger Mills[_2_]

On 12/12/2011 16:49, wrote:

What *really* matters is whether the fixing can pull out of the wall
and I find that a properly prepared 4mm/Yellow or 5mm/Red fixing is
perfectly capable of being able to hold a suitably sized screw such
that it won't pull out. Most of the weight of a radiator (or
bookcase, or whatever) will just exert a shear force on the screw and
not that much will try and pull it out.

I'm not sure that's right. In my experience, most of the weight is taken
by friction between the bracket and wall - which requires the screw to
be under sufficient tension to hold the bracket tight against the wall.
--
Cheers,
Roger
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