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    Nu-Guard® 31 Guardrail System

Nu-Guard® 31 Guardrail System

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The system has been tested to the guidelines in NCHRP 350 (TL-3 & TL-4) and MASH (TL-3) for a median and roadside longitudinal barrier and when correctly installed and maintained is capable of stopping, containing or redirecting an errant vehicle in a safe manner under NCHRP 350 and MASH impact conditions.

Nu-Guard® 31 is listed in NZ Transport Agency Specification M23 Appendix A for use on New Zealand State Highway roading network.

Click here (PDF 924 KB) for FHWA Letters of Acceptance for Nu-Guard® 31



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  • Height to centre of rail must be 635mm for TL-3 and TL-4 installations 
  • Tested and approved to NCHRP 350 TL-3 and TL-4 
  • Tested and approved to MASH TL-3 
  • Fully accepted and listed in NZTA Specification M23 Appendix A 
  • Post weight: 14.78kg 
  • Post length: 1980mm 
  • Height: 0.78m 
  • System Width: 0.139m (excluding bolt extension)
  • Post footprint: 0.061m² 
  • Maximum deflection is 1.2m for median and roadside applications at NCHRP350 TL-4 criteria 
  • Maximum 1.30m deflection at MASH TL-3 criteria 
  • No blockouts required 
  • Standard highway rail and fixings 
  • All components hot dip galvanised 
  • Post high tensile steel
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