MASH Compliant Safety Barriers

Since its introduction in 1999, the Australian/New Zealand Standard AS/NZS 3845 has utilised the NCHRP Report 350 guidelines as the basis for testing protocols to assess safety barrier related hardware and devices. In the recent revision of this Standard, Part 1:2015 and Part 2:2017 recognised the introduction of the Manual for Assessing Safety Hardware (MASH) guidelines, and updated to MASH as the basis for crash testing.

In an effort to encourage installation of MASH compliant devices, the Austroads Safety Barrier Assessment Panel (ASBAP) updated its assessment criteria to be in accordance the MASH guidelines as per AS/NZS3845 Parts 1 and 2.

The Panel set a staged transition period due to conclude at the end of December 2020, and this was recommended to the various state road authorities.

MASH TL1 COMPLIANT

MASH TL2 COMPLIANT

MASH TL3 COMPLIANT

MASH TL4 COMPLIANT

Safety Barriers WA offers the full range of MASH Compliant products for your project

These include our proprietary Ezy-Guard Smart and Ezy-Guard 4 systems which are fully compliant to MASH TL3. We have also extended this product family with the Ezy-Guard High Containment, the first ThrieBeam barrier in Australia which is compliant to MASH TL4. This offers a large increase in containment with a 58% increase in impact energy when compared to the old 350 TL4 systems. Both of these barrier systems can be terminated with the ET-SS End-Terminal which is compliant to MASH TL3.

MASH TL3 COMPLIANT

Ezy-Guard Smart

MASH TL3 COMPLIANT

Ezy-Guard 4

MASH TL4 COMPLIANT

Ezy-Guard HC

MASH COMPLIANT

ET-SS Guardrail Terminal

MASH TL3 COMPLIANT

 

MASH COMPLIANT

QuadGuard M10

MASH COMPLIANT

ArmorZone MASH

MASH COMPLIANT

BG800 Temporary Barrier

Changes to Standard – NCHRP 350 to MASH

The differences between NCHRP 350 and MASH reflect the upsizing of the American vehicle fleet since 1993 and amendments to remove testing inconsistencies in impact conditions and evaluation criteria in NCHRP 350.

The key differences between the two test protocols are:

  • Pickup truck mass increases from 2000 kg to 2270kg
  • Small car mass increases from 820 kg to 1100kg
  • Small car impact angle increases from 20 to 25 degrees
  • TL-4 truck mass increases from 8000 kg to 10000 kg
  • TL-4 truck speed increases from 80 kph to 90 kph
  • Terminal and crash cushion impact angle increases from 20 to 25 degrees.

The NCHRP 350 and MASH impact conditions and containment energy for the highest mass vehicle are summarised in the following tables. Lighter weight vehicles (820kg for NCHRP 350 and 1100kg for MASH) are also used in all tests to ensure that impact severity conditions are not exceeded for these smaller vehicles.

NCHRP-350 SUMMARY

Test LevelMaximum Test Vehicle MassImpact SpeedImpact AngleCrash Energy
TL-1Pickup – 2000kg50kph2535kJ
TL-2Pickup – 2000kg70kph2568kJ
TL-3Pickup – 2000kg100kph25138kJ
TL-4Single Unit Truck – 8000kg80kph15138kJ

MASH SUMMARY

Test LevelMaximum Test Vehicle MassImpact SpeedImpact AngleCrash Energy
TL-1Pickup – 2270kg50kph2539kJ
TL-2Pickup – 2270kg70kph2577kJ
TL-3Pickup – 2270kg100kph25156kJ
TL-4Single Unit Truck – 10000kg90kph15209kJ

All the products described on this page are manufactured by Ingal Civil Products (www.ingalcivil.com.au)