The introduction of our NRA approved H2 steel barrier
system is now replacing the use of concrete barriers
in medians on motorways throughout Ireland. The severity
of impact is reduced with steel systems as the force
is transferred to the energy absorbing steel barrier.
The system can be installed by driving posts through
the road pavement and offers a quicker, cleaner and
safer solution for high containment median barriers.
The H2 steel barrier system can be socketed at crossovers
allowing it to be demounted in emergency situations.
| Containment
Level |
Vehicle
Impact Test |
| |
Test |
Impact
Speed (km/h) |
Impact Angle (degrees) |
Vehicle
Mass (t) |
Vehicle
Type |
Normal Containment
N1
N2 |
TB 31
TB 32 |
80
110 |
20
20 |
1.5
1.5 |
Car
Car |
Higher Containment
H1
H2
H3 |
TB 42
TB 51
TB 61 |
70
70
80 |
15
15
20 |
10.0
13.0
16.0 |
Rigid HCV
Bus
Rigid HCV |
Very High Containment
H4a
H4b |
TB 71
TB 81 |
65
65 |
20
20 |
30.0
30.0 |
Rigid HCV
Articulated HCV |
| Impact
Severity Level |
Index
Values |
| |
ASI
(Aceleration Severity Index) |
THIV
(Theoretical Head Impact Velocity) |
PHD
(Post Head Decleration) |
A
B |
< 1.0
< 1.4 |
< 33 km/h
< 33 km/h |
< 20g
< 20g |
