
5.3
Site Grading
It is recommended that the area in advance of the
barrier be limited to a grading of 10H:1V and free
of undulations that may adversely affect the
trajectory of a dismounted rider.
5.4
Kerbs
Placing kerbs in front of the barrier is not
recommended. As an alternative subsurface grated
drainage should be considered.
5.5
Retrofitting
T
he
RiderPro
mounting bracket connection to the
post
just below the
thrie
beam with a 12mm hole
placed in the post
allows for
appropriate
vertic
al
align
ment with of the MPR system
with the w-
beam guardrail. This alignment reduces the
potential for rider snagging.
Attachment of
RiderPro
does not require any
dismantling
or loosening
of the existing guardrail
barrier
and associated hardware
. This reduces
installation time and avoids problems where debris
and/or vegetation can accumulate around the post.
Ref: IM 031 Rev 00
Date: 15/07/2021
Page 5/1
7
Property of
Margaritelli Ferroviaria S.p.A.
06135 Ponte San Giovanni - Italy
5
Design Considerations.
5.1
Length Of Need.
The Beginning of the LON is placed at:
•
ACP Sentry Barrier
ThrieB
eam System
: at
the
midspan between the 3
th
and the 4
th
post
from the RiderPro End Terminal
.
5.2
Minimum installation Length:
The Minimum installation Length of the
RiderPro
is:
•
ACP Sentry Barrier
ThrieB
eam System
:
20
meters (No 5 panels).
5.6
Placement within Guardrail End
Terminals
The end terminals of w-beam guardrail barriers are
designed to reduce the severity of a vehicle impact
near or at the end of the system.
These terminals may incorporate yielding posts,
energy-absorbing impact heads or a combination of
both.
It is recommended that
RiderPro
not be installed
within the guardrail end terminal section.
5.
7
7
Minimum Horizontal Radius
(Installation curvature radius)
The
RiderPro
can achieve a minimum horizontal
radius curvature of 25m onsite installed onto the
Sentry
Thrie
Beam system
, when supplied with
standard straight
RiderPro
panels. For installation
curvatures of less than 25m radius, pre-curved
RiderPro
panels need to be ordered prior to
installation. Contact your
ACP
representative for
further information once the installation radius is
identified.
5.8
End Termination
A specifically designed end terminal is available for
attachment to the
RiderPro
.
It is a requirement that the
RiderPro
end terminal
is installed on both ends of the system.
Figure 2. ACP Sentry Barrier and RiderPro Sentry: Minimum
Horizontal Radius