18 Revision 33 October 2022
be tightened to between 70 and 140Nm. Post bolts should be tightened to
between 70 and 140Nm.
• When Mega Guard is installed as a safety barrier it may also be set in
sockets. However, when used as a parapet system it may only be set on
base plates.
5.4 Mega Flex Transition
• There are 3 Types of Mega Flex transition: -
1. Mega Flex to Mega Guard
2. Mega Flex to Aluminium Parapet
3. Mega Flex to Steel Parapet
• Posts must be set as described in section 4. Post pitches must be as th
e
s
ystem drawings, deviations within the transition are not permitted.
• Beams should be hung on the posts using the correct fixing hand tight only.
Backing beams must be hung in the correct orientation so that the arrow
goes with the flow of traffic. The beams are fastened with Mega Flex M16
lap bolts which should be tightened to between 70 and 140Nm.
• Post bolts should be tightened to between 10 and 17Nm
• An inspection of the safety barrier should be carried out using the inspectio
n
ch
eck list on page 20.
5.5 Safe End P1
The Safe End P1 can be installed on either driven or concrete foundations.
The soil suitability should be established by applying the following test. A
bending moment of 6.5 kNm (6500Nm) must be achieved before the post’s
deflection exceeds 100mm, see sections 7 and 8 of this manual. In all
circumstances the post nearest the adjoining VRS should be the test post,
or a sacrificial post in the same area.
Please note if test data already exists from the adjoining VRS then this is
acceptable as confirmation that the ground conditions are suitable for the
P1.
The Safe End P1 can be used on high speed roads on the departure end of
a VRS. or where the speed limit is less than 50mph on both approach and
departure ends of a VRS.
The Safe End P1 can be connected to any N2 W2, W3, W4 or W5 system.
The Safe End P1 can also be connected to any H1 W2,W3 or W4 systems
that have been dual tested as N2 such as H1W3 ep and H1W3 ec3.3.
Refer to System progression chart on page 9 for compatible systems.
5.6 Safe End P4
The Safe End P4 can be installed on either driven or concrete foundations, a
foundation size of 450mm diameter by 1200mm deep should be sufficient.
The soil suitability should be established by applying the following test. A
bending moment of 8.5 kNm (8500Nm) must be achieved before the posts
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