valmont INGAL MashFlex MASH TL3, Руководство по эксплуатации продукта

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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
15
Release 07/22
MashFlex
Wire Rope Safety Barrier
7.0 MashFlex Maintenance
MashFlex is a low maintenance roadside safety barrier.
Except for repairs due to impacts, there is virtually no
maintenance required for the system. It is recommended
that regular drive-by inspections be performed to ensure
the following;
1. Post caps have not dislodged from terminal posts.
Delineation stickers are attached to the post caps
and a loss of numerous caps could result in poor
delineation.
2. Debris has not accumulated around the system. A
clear zone, free of hazards should exist immediately
behind the fence to accommodate for the expected
dynamic deflection.
3. Safety check ropes should be secured to the anchor -
Standard Terminal only. Refer WR-MF-55.
4. Ropes have not dislodged from the posts as a result of
minor impacts.
7.1 Cable Tension
MashFlex is supplied with pre-stretched wire rope. The
pre-stretching process removes the constructional stretch
in the wires as they ‘bed-down’. Wire rope is essentially an
elastic member and will not require retensioning after
most impacts. For fences subjected to regular vehicle
impacts or large seasonal temperature variations, it may
be necessary to evaluate the rope tension annually. This
can be undertaken using the FlexFence Tension Unit.
7.2 Bush Fire Damage
1
The performance of galvanized coatings when subjected
to bushfire depends on a number of factors, such as flame
duration, intensity and the characteristics of the galvanized
coating and the technology with which it is applied.
Typical bushfire conditions may expose steel structures to
air temperature of 800°C for periods of up to 120 seconds,
however zinc coatings are generally reflective and will not
absorb heat at the same rate as an uncoated steel surface.
Depending on the section thickness of the steel, the actual
steel surface temperatures may not exceed 350°C.
Typically, the bushfire flame duration and intensity are
not high enough to compromise the structural strength
of the steel. The hot dip galvanized coating will thus
remain largely unaffected through a bushfire event. If the
bushfire causes damage to the galvanized surface, then
the item(s) shall be replaced.
7.3 Damage Assessment
In the event of a vehicle impact, damage to the barrier is
to be assessed in accordance with Table 6. In the event
that the ropes are to be cut, they are NOT to be cut under
tension.
A Safe Work Method Statement is available upon request
to assist in the safe repair of MashFlex.
1
Information based upon testing conducted on behalf of BlueScope
Steel by the CSIRO Manufacturing and Infrastructure Technology
Bushfire CRC in 2005.