valmont INGAL MashFlex MASH TL3, Руководство по эксплуатации продукта

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8
Release 07/22
MashFlex
Wire Rope Safety Barrier
Wire Rope Safety Barrier Wire Rope Safety Barrier
ASH LE
I N G A L C I V I L P R O D U C T S
ASH LE
I N G A L C I V I L P R O D U C T S
5.0 End Terminals
End terminals are used to anchor the system and provide
a soft gating impact to prevent vehicles from launching
or snagging upon impact with MashFlex.
5.1 MASH TL3 Terminal
The TL3 Terminal has been crash tested to meet the
requirements of MASH TL3. It can be used on all new
installations or retrofitted to existing MashFlex or
Flexfence installations.
The TL3 Terminal gradually tapers the cables from full
height to an anchor bracket located at ground level over
10m. Refer drawing WR-MF-050 general arrangement
and point of redirection.
The TL3 Terminal has demonstrated an ability to provide a
soft, gating impact without releasing the cables from the
anchor point. This non-release feature allows the system
to remain anchored following design impacts.
This important feature contrasts terminals that are
designed to release the cables for end-on impacts. Once
these terminals release the cables their ability to provide
continued containment and redirection for errant
vehicles is compromised.
5.2 Standard Terminal
The Standard Terminal is designed to provide the
necessary cable anchoring to redirect errant vehicles that
impact the wire rope barrier within the length-of-need
section. Use of this terminal is limited to locations where
geometric constraints limit the use of the TL3 Terminal
and it should only be used where it is shielded behind
another barrier and cannot be impacted.
6.0 Installation
The following written instructions should be read in
conjunction with the MashFlex drawings.
A Safe Work Method Statement is available upon request
to assist in the safe assembly of MashFlex.
The installation of MashFlex requires specific tooling for
the swaging of the end fittings onto the cables, and also
for applying the appropriate tension at the end of the
installation. This equipment is known as the FlexFence
Tension Unit and FlexFence Swaging Unit. Please contact
your nearest Ingal representative for the safe operating
instructions for this equipment.
6.1 Site Preparation
The approach terrain to the barrier should be level,
otherwise a maximum grading of 1V:10H is permitted.
Steeper slopes may result in the vehicle impacting the
barrier at other than the design height.
6.2 Horizontal and Vertical Alignment Criteria
The length and/or horizontal curvature of an installation
of wire rope barrier may increase the dynamic deflection
of the barrier. In addition, horizontal curves may place
more lateral load on the post foundations. Horizontal
curve of less than 200m radius are not recommended.
To calculate the effect of a curve on the deflection,
multiply the deflections as detailed on the system
arrangement drawings by the curve correction factor in
Table 3, the length column is the total length of the run.
These correction factors only apply to convex curves
The minimum allowable sag vertical curve for wire rope
barriers is ≥ 30m. (K = length of VC in metres divided by
the change in grade expressed as a percentage). There is
no K value limit for crest curves.
6.3 End Anchor Site Preparation
The site should be inspected for the presence of
underground utilities prior to any excavation. The site
should be prepared free of obstructing vegetation and
other hazards that may interfere with the installation or
operational performance of the system. Some sites may
require minor grading if installed beyond the edge of the
pavement shoulder.
Table 3: Length and Curve Correction Factors
Length (m)
Convex Curve Radius (m)
200-299 300-449 450-749 750+
0-100 1.4 1.3 1.1 1.0
101-200 1.6 1.4 1.2 1.0
201-300 1.6 1.5 1.3 1.1
301-500 1.7 1.5 1.3 1.2
501-1000 1.8 1.6 1.4 1.2
Figure 3: Standard Terminal