King MASH Composite Block for 12″ Guardrail Applications

King MASH Composite Blocks^® are injection molded guardrail offset blocks composed of Recycled High Density Polyethylene (HDPE) and tested to AASHTO’s MASH, 2nd Edition (2016), Test Level 3 specifications. The King MASH Composite Block is offered as an alternative to 12″ (305 mm) depth wood blocks on W-Beam guardrail systems, utilizing standard W6x8.5# / 9# (W150x12.6 kg / 13.5 kg) steel posts.

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Features

Eligible for reimbursement under the Federal-aid highway program, per FHWA letter HSST-1/B-353, dated 21 December 2020, as a MASH 2016 device.
Self-hanging fingers.
Self-aligning side rails.
Lightweight – only 7.0 lbs. (3.2 kg)
Weighs less than other 12″ MASH blocks.
Bottom tab supports rail during installation.

Assembly & Maintenance

Self-hanging fingers minimize the need for assistance by end-users during installation.
Self-aligning side rails are designed to hold block in place and resist rotation.
King Blocks are designed to retain their original size over time, which helps reduce the frequency of retightening guardrail post bolts.
Formulated with UV inhibitors, to reduce long-term degradation.
Weather-resistant materials minimize damage related to rain, snow, and extreme cold/heat.
Blocks are composed of durable materials resulting in less damage by ongoing roadway operations – such as snowplowing and mowing.
HDPE offers superior resistance to solvents, alcohols, acids and alkalis.