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years ago as part of a wider ongoing
ceremonial streetscape project.
Given the huge historical and cultural
significance yet sensitivity of the
Westminster location, the gates had to
be functional and secure yet harmonise
with the environment to fit in and
reassure the public – call it an
aesthetically pleasing HVM gate rather
than a barricade-style solution.
Our brief was to create a simple, low-cost
lockdown gate to block a road up to
8m wide and that could blend in
beautifully in any architectural
environment. They also wanted the
hanging and closing posts to be
removable, so the gates could be either
permanent or temporary.
The lockdown gate was subjected to
multiple IWA14-1 tests (see separate
panel) in its development from a simple
removable lockdown gate to a
permanently-installed aesthetic design
to blend into the iconic and historic
environment of Westminster.
The technology has since been
installed elsewhere at other locations
across London, in Solihull and as far
afield as Australia.
Increasingly robust barriers like our
lockdown gates are being created to
comply with the latest international
IWA14 impact test standards.
And aesthetics and their harmony
with the environment they are set in is
of growing importance as urban
planners try to avoid creating cityscapes
more akin to war zones than modern
21st century urban spaces.
Street furniture that doesn’t obviously
appear to be HVM product is therefore
desirable, breaking up ‘raceways’ and
providing ‘safe areas’ to which the public
can flee for sanctuary.
We have installed both fixed and
retractable HVM bollards at the
Westfield Shopping Centre in west
London, King George Square in
Brisbane and around the Coca-Cola
Arena in Dubai (see separate case
Venue operators such as Old Trafford
and Wembley are increasingly staging
counter-terrorism awareness and
The IWA14 standard
The IWA14 standard was developed by the
International Organization for Standardization
(ISO), sponsored by the UK Government’s CPNI
on behalf of the international community and
facilitated by BSI Standards Limited.
ISO is a worldwide federation of national
standards bodies or ISO member bodies created
to introduce greater conformity into global
standards and common baselines to classify and
International Workshop Agreement (IWA) 14
came into effect on 15 November 2013 and
covers two parts: the performance requirement,
vehicle impact test method and performance
rating; and its application, including design
guidance and correct installation.
It specifies a classification system and a test
method for rating the performance of vehicle
security barriers (VSBs) or gates subjected to a
single horizontal impact by a test vehicle.
It identifies impact test tolerances and vehicle
performance criteria which need to be met in
order for a product to conform and be granted a
It defines the vehicle type, test mass and
impact speed together with the required
measurements, vehicle and test item details that
should be recorded and reported.
After impact and if the VSB or gate stopped
and immobilised the test vehicle, then testers
measure the penetration distance from the front
of the vehicle cargo load bed to the position of
the original rear face of the VSB. They also
record the dispersion distance of major debris.
These measurements can be used to choose
the most suitable VSB or gate for each location.