Release 08/21
High-Containment Roadside Safety Barrier
19
HIGHWAY
Table 4: Damage Assessment of Ezy-Guard HC
Type of Defect
Description of the Defect
Action to be Taken
Galvanizing
damage on Z-Posts.
The sum total of the damaged area does not exceed 35cm
2
(0.5% of the total surface area).
The sum total of the damaged area exceeds 35cm
2
An organic zinc rich epoxy paint is to be applied to the
repair area in two coats as per section 7.4.
The Z-post is to be replaced.
Galvanizing
damage on rails.
The sum total of the damaged area does not exceed 200cm
2
(0.5% of the total surface area) and no individual damaged
area does not exceed 40cm
2
.
The sum total of the damaged area exceeds 200cm
2
(0.5%
of the total surface area) and/or an individual damaged area
exceeds 40cm
2
.
An organic zinc rich epoxy paint is to be applied to the
repair area in two coats as per section 7.4.
The rail is to be replaced.
Mechanical
damage on
Ezy-HC-Carriages.
The Ezy-HC-Carriage has chips or cracks.
The Ezy-HC-Carriage is to be replaced.
Mechanical
damage on Z-Posts.
The post is bent.
The Ezy-Carriage cannot travel freely along the post due to
distortion.
The post is to be replaced.
The post is to be replaced.
Mechanical
damage on rail.
The rail is dented, twisted or flattened.
There are tears in any part of the rail.
The slots in the rail are distorted.
The rail is to be replaced.
The rail is to be replaced.
The rail is to be replaced.
Mechanical
damage on bolts.
The body of the bolt is distorted.
The thread of the bolt is damaged.
The bolt is to be replaced.
The bolt is to be replaced.
Disturbance of
material around
posts
The material around the post is loose or uncompacted.
Any disturbed pavement or material around a post shall
be left dense, tight and smooth so that resistance to water
penetration is similar to that of the adjacent surface.
10.0 repAIr
10.1 Bush Fire Damage
Ezy-Guard HC does not contain any plastic, timber or rubber
components that will burn.
The performance of galvanised coatings when subjected to
fires depends upon a number of factors, such as flame duration
and intensity.
Typical bushfire conditions may expose steel structures to an
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 temperature 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 also typically
remain unaffected through a bushfire event. If the bushfire
causes damage to the galvanized surface, then the item(s)
shall be replaced.
10.2 Damage Assessment
In the event of a vehicle impact, damage to the barrier is to
be assessed in accordance with Table 4.
A Safe Work Method Statement is available from Valmont
Highway upon request to assist in the safe repair of Ezy-
Guard HC.
Any item that is replaced is to be reinstated observing the
installation tolerances nominated in Section 7.13. Only items
purchased from Valmont Highway shall be used for the repair
of Ezy-Guard HC.
10.3 Dismantling Sequence
Prior to undertaking dismantling due to a vehicle impact,
the area should be assessed for hazards. These include trip
hazards, sharp edges and snag points.
During a vehicle impact, the rail will disengage from the posts
as they yield by bending at ground level. The recommended
dismantling sequence is as follows;
1. Dismantle the rail splice by removing the M16x32mm
mushroom head bolts and nuts. There are 8 bolts located
at each splice location.
2. Rails that are still attached to posts outside the impact
area are disconnected by removing the carriage bolts. A
10mm hex key is required.
3. Once the area is clear of damaged rail, the posts can be
removed. Since the posts yield by bending near ground
level, a sling or chain can be attached below the bent
section.
4. The damaged post can be lifted using a backhoe or post
extractor attachment.
5. Any disturbed pavement material shall be left dense, tight,
and smooth prior to the installation of replacement posts.
6. Rails, posts and carriages to be disposed of, should be
recycled at a ferrous scrap recycling facility.
Summary of Contents for Ezy-Guard HC
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