CON-SERV Inc will supply elastomeric bearing pads to provide structural support in bridges as well as commercial and industrial buildings, petro-chemical and power plant applications. These parts, depending on the type of elastomer, provide uniform load transfer, accommodate thermal movement, allow for end-beam rotation and isolate components of the structure against vibration, noise and shock.
CON-SERV Inc designs and produces both AASHTO grade neoprene pads as well as AASHTO grade preformed fabric pads. These pads can also be supplied with filled Teflon® (PTFE) bonded to them for use as the lower element in a slide bearing which will provide for longitudinal movement as well as the rotation required.
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 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 bearing is 200°F.
The following formula has proven successful in calculating the thickness of the preformed fabric pad to accept a given rotation.
This formula allows for the internal stresses built up in the pad upon rotation.
Thickness Required = ((W/2) x tan a) / "C"
- W = width of pad in rotation direction
C = coefficient of friction
CON-SERV Inc recommends an 11 ga. plate be laminated every 2" in pads over 2" thick for strength and stability.
- Durometer: 90 ± 5 (Shore A)
- Compressive Strength: 10,000 psi max
- Maximum Design Pressure: 1,500 psi
- AASHTO Grade
These materials will substitute for neoprene in areas where vibration or heavier loads are present. The random fiber material is well-suited to concrete construction as a cost-saving alternative to neoprene or preformed fabric pads. These materials may be provided with holes, slots or surfaced with Teflon (PTFE).
CON-SLIDE™ Type RFR may also be used in conjuntion with a Type CSA or CSB assembly.