Plastic Supports for Reinforcing Steel

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March 27, 2008

The following manufacturers have passed the testing and acceptance procedures in Supplement 1081 and are approved for use.

ODOT Spec. 709.15      This specification covers the material requirements for plastic support chairs for reinforcing steel used with Item 509, Reinforcing Steel.  All plastic chair designs shall be capable of supporting at least 330 lbs. (150kg) without any recorded deformation, breakage or damage at a temperature of at least 110^oF (38^oC).  No plastic chair designs shall have sharp protrusions or edges that could damage or penetrate coatings on the reinforcing steel.  All chair designs shall be capable of permitting a No. 57 course aggregate to flow either through or around the reinforcing steel support without binding or causing a void in the finished concrete.  No plastic chair design shall be supported on a footprint of greater than 2 sq. inches (1300 sq mm).  Plastic chair designs shall be manufactured from material chemically inert to concrete. 

Company Name	Chair Model #
Aztec Products 13169 Slover Ave.  Suite B Fontana, CA  92337 800-531-3355	Tower Chairs from 4" to 10 "
Aztec Products	EZ Lok Slab Bolsters from 1 1/2" to 3 heights