It has a smaller footprint, is lighter weight and has no requirement for a blockout, this means the Nu-Guard® 31 steel post guardrail system is comparable in cost to wooden post systems and is simpler and quicker to install.
Nu-Guard® 31 Guardrail System
FEATURES
- System has a smaller footprint and no blockout –maximises road area
- Only 12g W-beam guardrail system that has been tested and approved to NCHRP 350 TL-4 providing containment and redirection of high Centre of Gravity (CoG) vehicles
- Tested and approved to MASH TL-3
- NUCOR® steel posts are one third the weight and 16 times smaller in area than timber posts - which means easier handling and transport
- High tensile galvanised NUCOR® steel post designed for easier after-impact repair of system
- Environmentally friendly - manufactured using recycled steel, no timber treatment by-product leaching into soil
- Uses standard highway rail and fixings
- Can be used as a median or roadside barrier
- NUCOR® steel posts designed to split on impact to avoid the guardrail tearing and reduce the incidence of wheel snagging
- NUCOR® steel posts and no blockout enable faster installation (using post rammer) and with steel, longer post life
- X-350: 31 TL-3 end terminal available - can be installed at the same rail height as Nu-Guard® 31
SPECIFICATIONS
- 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
STANDARDS AND APPROVALS
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
RESOURCE DOWNLOADS
- Product & Installation Manual PDF (4 MB)
- Brochure PDF (4 MB)
- Check List PDF (85 KB)
- Technical Drawings
- Leading Transition TL4 Nu-Guard 31 to Rigid Barrier - Drawing PDF (95 KB)
- Leading Transition TL4 Nu-Guard 31 to Rigid Barrier - Letter of Acceptance PDF (98 KB)
- Curved Terminal Drawing PDF (97 KB)
- Transition to Trailing End Drawing PDF (73 KB)
- CSP Barrier Manual