On Friday, 23 August 2019 20:33:05 UTC+1, Chris Green wrote:
newshound wrote:
On 23/08/2019 13:59, John wrote:
newshound wrote in
o.uk:
On 23/08/2019 13:15, David wrote:

We are about to use kitchen units from Benchmarx to fit out an
office.

With the batten first, it is usually only a one person job even to fit
double width wall units. Batten first also helps if you have
"difficult" walls. I have in the past used units that "hang" on high
hooks that you fit to the wall first, but it is more difficult to get
the units level and at the same height.

A length of Dexion type angle is less obvious than a batten. The fixing
to the wall is hidden by the cupboards. (if you fit it the right way)

Means a visible gap if you have an exposed end, though.

As long as the fixings are sound I don't see any necessity for these.
Hanging the cupboards on screws will exert most force in shear and the
'pull out' force will be similar with or without the support at the
bottom. Admittedly our walls are very solid, I might go for something
extra on a stud wall, but in a stud wall I think I'd simply search for
the timber and fix directly or indirectly to that.

A well fixed steel screw will hold an incredible weight in shear. My
rule of thumb for steel's strength is 40 tons/sq in which gives a
shear strength of somewhere around a ton for a 5mm screw. The screw
will probably fall out first of course but I do always wonder why
people use great fat fixings for holding a few tens of kilograms.
Nearly all my fixings are 3.5mm or 4mm screws in yellow plugs and I
can assure you they *don't* fall out or break.

Many do. Some suffer from masonry crumbling, or the masonry simply snaps. Most people fail to clear the dust out, resulting in a weak bond. And the ida that you can reliably safely support a ton on a bit of 5mm wire sideways strikes me as decidedly optimistic.


NT