Type 1 Design
Total dead plus live load on bottom pad maximum of 1000 psi with maximum dead load of 750 psi
Maximum deflection at 2000 psi is approximately 10% of thickness of bottom pad. Design for 2% rotation in l direction
Design coefficient of friction
A. 750 to 1000 psi of .04
B. 500 to 700 psi of .05
To design top plate overlap of bottom pad: bottom pads less than 40 sq in / minimum edge is 1/2 in;
bottom pads more than 40 sq in / minimum edge is 3/4 in
Complete bearing assembly capable of test to 5000 psi for 5 minutes with no visible damage
Recommended operating temperature range is -40ºF to 180ºF
Neoprene material meets AASHTO specification. The bearings can also be manufactured in natural rubber to AASHTO specification.
Type 2 Design
Total dead plus live load on bottom pad maximum of 2000 psi with maximum dead load of 1700 psi
Maximum deflection at 2000 psi is approximately 10% of thickness of bottom pad. Design for 2% rotation in l direction
Design coefficient of friction
A. 1000 to 1500 psi of .04
B. 1500 to 2000 psi of .03
Complete bearing assembly capable of test to 5000 psi for 5 minutes with no visible damage
Recommended operating temperature range is -70ºF to 200ºF
Special polyurethane meets DYMAT™ material specification, which is available on request.
All other details and installation same as Type 1 bearings.
