ENGINEERING YOUR SAFETY
WWW.HIGHWAYCARE.COM
Rev. C
–
10/18
©2018 Highway Care Limited. All Rights Reserved.
Page
36
of
61
Other Operations
Curved Barrier
In many cases, the barrier may have to follow a
curve. There are a number of options
depending on the curve. These are described
below followed by a table of curvatures that can
be achieved and methods of estimating the
curvature.
1.
Movement at the QuickLink - this allows
slight curvature usually sufficient for
horizontal curves on motorways and dual
carriageways.
2.
Slackening the bolts in the standard joint in
the middle of a 12m section and retightening
after "bending".
3.
Using a BG800 0.6m long Angle Section
these can be specified with a 2.5°, 5° or 10°
angle and are quickly installed using the
standard QuickLink connections.
4.
Replacing the standard joining plates at the
bolted joint in the barrier with slotted plates
designed to allow up to a 5° bend in the
barrier. Where these plates are fitted the
bolts need to be slackened slightly to set
required angle and then all bolts at the joint
where the plates are installed must be re-
tightened.
5.
Using shorter barrier lengths. If methods 3
and 4 are used with 12m barrier sections, a
10º bend can be achieved in 12m. If,
however, the 6m (2x3m) barriers are used
then effectively the radius is halved.
To find the radius of the curve, measure the
straight line distance between two points on the
curve (C) and measure the maximum distance
from this straight line to the curve (H) and use
formula.
To find radius of curve:
H
H
C
R
Radius
8
4
2
2
+
=
=
TO FIND THE ANGLE PER 12 METRE LENGTH
Radius
Angle
688
=
