NU-GUARD-27 is a standard W-beam strong post guardrail system available for use with offset blocks for 27″ rail height applications. The system is NCHRP-350 crash-test proven to guard against collisions with fixed objects or hazards.

System features include:

  • Crashworthy to NCHRP 350 criteria.
  • FHWA accepted for use on roads with design speeds up to 65 mph. (Ref. B-162)
  • RIB-BAK 5 lb./ft. U-Channel post is easier and faster to install than wood or I-beam posts.
  • RIB-BAK U-Channel posts available galvanized or powder coated.
  • Approved for roadside applications
  • Through-bolt slot works to maintain rail height during impact.

NU-GUARD-27 Strong Post Guardrail System


Use with standard w-beam (AASHTO M-180, Class A or B, Type II)

W-Beam Height

27” for Roadside

RIB-BAK U-Channel

5 lb./ft.; 6’ 6”; Nucor Grade SP-80

Post Spacing

6’ 3”

Offset Blocks



6 to 1 or less

NCHRP 350 Tested

TL-3 Compliant

The Nucor® and Nucor Steel Marion, Inc.® name and logos, RIB-BAK®, LAP-SPLICE®, SLIP-SAFE®, SLIP-SAFE SUPREME®, NU-GUARD®, NU-CABLE®,NU-TEN® and It's Our Nature® are registered trademarks of Nucor Corporation. Powder-Shell™ is a trademark of Nucor Corporation.