King Block® & King Size King Block®

Guardrail Offset Block

Trinity’s King Block® and King Size King Block® are injection molded offset blocks composed of High Density Polyethylene (HDPE) and Ground Recycled Rubber tested to NCHRP Report 350 Test Level 3.

The King Block® and King Size King Block® may be used as a substitute for wood or steel blocks on steel posts.


  • Self-hanging fingers.
  • Self-aligning side rails.
  • Lightweight – only 4 lbs. for W-Beam, 10 lbs. for Thrie-Beam.
  • Bottom tab supports rail during installation.
  • Molded product design helps reduce inconsistencies sometimes seen in wood blockouts.

Assembly & Maintenance

  • Self-hanging fingers designed to help facilitate easier installation.
  • Self-aligning side rails designed to help hold block in place and reduce spinning.
  • Narrower width helps facilitate easier access to bolts.
  • Once installed, blocks maintain their original size which helps reduce the frequency guardrail bolts need to be tightened due to shrinkage often found with wood blocks.


King Block®
4″ W x 14″ L x 7.5″ D, 4 lbs. (100 mm x 350 mm x 190 mm)

King Size King Block®
4″ W x 22″ L x 7.5″ D, 10 lbs. (100 mm x 560 mm x 190 mm)

Product Images

Product Documents


PI Sheet



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