T-31 Guardrail

T-31 Guardrail is a strong post W-beam system tested to both NCHRP Report 350 Test Level 3 and MASH Test Level 3. In the 31″ system height, the W-beam attaches directly to Steel Yielding Line Posts (SYLP) and does not use offset blocks.

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  • Strong posts with weakening holes at the ground line.
  • Does not use offset blocks which helps reduce site grading.
  • Countersunk-head bolts and Post Flange Protectors.
  • Mid-span splices between adjacent posts.
  • Single-Face application.


  • Standard W-beam Guardrail
  • Steel Yielding Line Posts (SYLP™): W6 x 8.5 x 6’ 0″ (W150 x 13.0 x 1.83 m)
  • W-beam Guardrail Height: 31″ (787 mm)
  • Post Spacing: 6’ 3″ (1.9 m)
  • Countersunk Head Bolts: 5/8″ x 1¾″ (16 mm x 45 mm)
  • W-beam Flange Protector at Each Post

Product Diagram

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Product Documents

PI Sheet

T-31 Guardrail