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Plain and shimmed bearings are available in standard Shore A durometers of 50, 60 or 70 based on state and/or AASHTO Code. Section 18. natural rubber or neoprene. For sizing criteria. For economy, a commercial grade is also available.PTFE surfaced neoprene backed slide bearings are also available. Type CSA material is recommended bonded to a 10 GA. steel laminate which has in turn been bonded to neoprene. If minimum dead load pressure is less than 200 psi, it is recommended that the elastomer be epoxy-bonded to concrete. If on steel, a tack plate is recommended for positive reinforcement. The maximum temperature at a neoprene hearing is 200°F.
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