Basin rubber support utilizes an elastic rubber block enclosed in a semi-closed steel basin, which exhibits fluid-like properties under tri-axial stress conditions.

A point to achieve the rotation of the upper part of the bridge, while relying on the low friction between the PTFE slider on the middle steel plate and the stainless steel plate of the upper seat plate.

Coefficient of friction, to achieve horizontal displacement of the upper structure, so that the shear force supported by the support is no longer solely borne by the rubber, but acts indirectly.

On the sliding between the steel basin and the PTFE sliding plate and stainless steel.