Clearview National September 2015 - Issue 166 | Page 66

hardware& security

“Initially however, for a
company who had originally
moved away from espags to
shootbolts, and had spent the
last few years shouting about it,
needed convincing! Part of Roto’s
campaign to introduce TSL to the
market was to invited fabricators
to make a window in their own
profile and invite key distributors
and the fabricators to witness it
being tested.
“Roto wanted its whole supply
chain to observe for themselves
what this new product was
capable of doing. A lot of people
really did have to see it to believe
it! The demonstrations proved to
be extremely successful and gave
people the confidence needed to
see how the new TSL product
could stand up to the best of the
shootbolts that existed in the
market place at the time.
“The discreet appearance
of the lock was not the only

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advantage for the TSL, we soon
discovered that fabricators liked
the simplicity of fitting an espag
system. It also offered something
different with the larger sizes
offering eight individual cams
and its unique twin-cam action, a
feature which allowed each pair of
cams to close together in common
strikers, creating an extremely
strong and secure locking point
across the whole window was an
immediate winner.
“Roto provided detailed
reports from the tests they
conducted, which helped support
the strength of the product
and proved the windows could
easily breeze through against any
standard 3 kN loading test. In
line with standard procedure,
the engineers applied the force
to each locking point three
times – with the additional 1 kN
being applied in three different
directions.

“We found that when trying to
convince customers to consider
the TSL lock, they couldn’t
resist the opportunity to see
how well their own window
could withstand being tested to
destruction. Roto supported us
by helping customers one by one
to test their windows. Amazingly,
the vast majority of windows
survived being pushed to the safe
limit, which was way beyond the
standard 3 kN. Of course, all of
this was done using hydraulic
equipment to impart forces way
beyond what anyone would easily
be able to apply with a crowbar.

“TSL is one of those ideas that
was so straightforward it seems
obvious when you’re used to
seeing it - but that’s the beauty
of so many great inventions: their
simplicity!

‘Roto’s TSL espag lock
is still going strong’
“Twelve years on, I no longer
work for Avocet, but it’s exciting
to see Roto’s TSL espag lock
is still going strong. A simple,
but extremely effective window
lock still offering reliability and
enhanced security on regular
side-hung or top-hung casement
windows. It’s a shame so many
new build properties are still
being constructed and fitted with
basic espags. If only the customers
knew how easily and low cost
their windows could have been
made so much more resistant to
intruders by fitting the TSL.

66 » SE P 2015 » CL EARVI E W- UK . C O M