valmont INGAL MashFlex MASH TL3, Руководство по эксплуатации продукта, Страница: 4 / 28

4
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
Table 1: Post Footing Selection Guide
Centre of Post Footing to
Rounding Point
Standard Soil
Weak Soil
Dia Depth Dia Depth
Less than 0.5m 300 600 300 750
Greater than 0.5m 300 600 300 750
The minimum concrete compressive strength at 28 days
is 30Mpa.
In the event that the soil type cannot be verified, then
a post pull-over test can be conducted to validate the
structural capacity of the footing.
A pull-over test is conducted by applying a load to the
top of the post whilst positioned in the proposed footing
design. The footing is required to remain stable until the
post yields. Once the post yields, the footing has been
subjected to its maximum potential load.
For locations where the typical 600mm deep post
foundation cannot be installed, a strip footing with post
on baseplates is an alternative option, refer drawing
WR-MF-003 for further detail.
3.5 Minimum Length
There are two geometric methods used to determine
the likely trajectory of a vehicle that leaves the road in the
vicinity of a roadside hazard and the minimum length of
barrier required to protect from this hazard.
The most common method is the run-out length
method and an alternative is a method based on angle
of departure.
Prior to design or installation, designers should consult
the relevant road controlling authority to establish the
local jurisdictional practice as the methods may result
in different lengths. Both methods are detailed in the
Austroads Guide to Road Design – Part 6.3.
For instances where geometric constraints limit the
installation of the recommended length under the
above design methods, the absolute minimum length of
minimum length of need for a run of MashFlex is 70m, this
includes a TL3 Terminal on both ends. These installations
should be considered within the requirements of the
road controlling authority’s Extended Design Domain.
3.6 Maximum Length
Please refer to your local road controlling authority for their
max run length recommendation.
3.7 Point-of-Need
MashFlex is designed to contain and redirect errant
vehicles away from road side hazards. The location along
the barrier system that redirection occurs is known as the
point-of-need.
The point-of need for the MashFlex system is 11.73m
from the anchor point when using the MASH TL3 End
Terminal.