We use the term “Bridge Bearing” as an indication of quality. All bearings that support bridges or highway overpasses use Natural Rubber compounds, so the moulded product has high tensile and elongation characteristics and minimal permanent set or creep. Similarly, they must pass rigid tests for ozone and oxygen resistance.
The pool shell should be restrained from lateral movement to AS1170.4 using natural rubber restraint pads. Restraint Pads isolators shall be compounded to AASHTO Bridge Bearing Natural Rubber Specifications. Maximum Dynamic Stiffness of 1.4. Mounts shall allow for a 3x Maximum Temporary Overload. Restrain Pads shall be type BBNR as manufactured by Mason Industries, Inc.