ENGINEERING YOUR SAFETY
WWW.HIGHWAYCARE.COM
Rev. C
–
10/18
©2018 Highway Care Limited. All Rights Reserved.
Page
6
of
61
Length of Need
The length of need for BG800 is the total
installed length between the two inner anchor
shoes.
The beginning of the length of need is measured
6m from the approach (upstream) end of the
BG800 terminal (at the inner anchor shoe). It
must be noted that when an approved, non-
gating (redirective) end termination such as a
crash cushion is connected to the BG800
terminal, then the approach (upstream) end of
such system becomes the beginning of the
length of need. If an approved, gating (non-
redirective) end termination such as a crash
cushion is connected to the BG800 terminal,
then the beginning of the length of need
remains 6m from the approach (upstream) end
of the BG800 terminal (inner anchor point).
When deciding length of need of a system
consideration must be given to the proximity of
any anchor points to any excavations, if the
BG800 is to be used to protect errant vehicles
from excavations we recommend that the
anchoring takes place beyond any excavation
and if any extra anchoring is required, it should
be single sided away from the excavated face.
Ground Conditions
The ground conditions that the barrier is to be
installed on and anchored to, need to be
established to ensure the correct anchoring
choice is made and the appropriate anchor shoe
is connected to the barrier. Details of common
ground conditions and the available types of
anchors and anchor shoes can be found in
drawing BG-60-23 and in the appendix of this
manual.
Note: For use of BG800 on any ground conditions
or anchors that are not shown in this drawing
please contact Highway Care Ltd for further advice.
Crash Cushions
When choosing a suitable crash cushion for use
with BG800, special consideration must be given
to opting for a gating (non re-directive) crash
cushion or a non-gating (re-directive) crash
cushion. A non-gating crash cushion is one that
has been tested to withstand a side impact from
an errant vehicle and a gating system is one that
has not been tested for this impact angle. If
opting for a gating crash cushion then
consideration must be given to allow for a safe
run out area behind the system.
If it is not possible to locate the terminal ends
outside the clear zone, then an approved end
termination (such as a crash cushion) can be
fitted to the BG800 full height terminal. Any
crash cushion placed in front of a full height
terminal will have its own anchoring
specifications and assembly instructions. Any
connection between BG800 and the approved
end termination will be designed and supplied
by either the BG800 supplier or the approved
end termination supplier. They shall work
together to ensure a suitable connection is
available.
Approved end terminations that are currently
available with designed connections are:
I.
Tau II
–
Non gating
(re-directive)
II.
QuadGuard
–
Non gating
(re-directive)
III.
Absorb 350
–
Gating
(non re-directive)
IV.
TRACC
–
Non gating (re-directive)
V.
SMART
-
–
Non gating (re-directive)
