ENGINEERING YOUR SAFETY
WWW.HIGHWAYCARE.COM
Rev. C
–
10/18
©2018 Highway Care Limited. All Rights Reserved.
Page
45
of
61
Maintenance & Repair
BG800 is generally a maintenance free barrier
system.
It is recommended that some basic
maintenance is carried out on the system, we
suggest after 10 years of being installed a
thorough inspection of the system is carried out,
this involves a visual check for signs of corrosion
both outside and inside (using the hatches for
access), and a check that the fasteners are tight,
this could be done by taping the fastener with a
hammer. We suggest that this inspection is
carried out at
5-year
intervals after the first
inspection.
Galvanising Durability
The steel components supplied as part of the
Highway Care BG800 steel barrier system are
hot dip galvanized using a process which
conforms to EN ISO 1461:1999.
According to EN ISO 1461:1999 the minimum
thickness of zinc coating that should be applied
to the component is dependent upon the
component thickness. According to this
standard we can expect the zinc coating of the
steel components of the BG800 system to be
between 55
μ
m and 85
μ
m.
The durability of all steel components of Vehicle
Restraint Systems (VRS) that are hot dip
galvanized depends on many factors, including
the environment where they are put into
service.
Considering the areas where VRS are normally
located and using the table from EN ISO
14713:1999 (which shows the indicative
corrosion rates for various environments). We
can estimate the expected lifespan of BG800
components.
This estimated lifespan is from 20-100 years
and based on the assumption that the zinc
coating on any of the components remains
undamaged. If damage to the zinc coating is
carefully controlled, it is reasonable to accept
that the lifespan will be extended.
Repair
Usually after a design impact there is little
damage to BG800 and it could continue to be
used without concern. If however the barrier
has had to withstand a severe impact then it
may be necessary to remove and replace a
section, this would need to be done in the
unlikely event of a tear in the barrier wall or if
the barrier has deformed a great deal (i.e. if the
barrier run has been left with a large and
unacceptable kink in it length).
If damaged sections requiring attention are
within 180 metres of the end of the barrier it
may be easier to remove sections from the end.
If the damage is further from the end, the
barrier will have to be split at the downstream
end of the section to be removed by unbolting
the jointing plates from two joints 12 metres
apart. The bolts can be accessed through the
hatch by the joint.
It may also be found that sections either side of
the impacted length have had the bolt holes
elongated at the joint. If during a visual
inspection it is noticed that the gap between the
two sections of barrier bolted together have
come apart more than 15mm then it is
necessary to remove these sections, inspect for
damaged bolts and reassemble with the joint
closed. If on reassembly the joint is not closed
