Bridge plate rubber supporting seat consists of multi-layer rubber and thin sreel sheet via vulcanization and adhesion. It has suffvient vertical rigidity and is able to reliably transfer the opposite force of the upper structrte to piers and it possesses very good elasticity to suit to the turn of the beam end. It also possesses very god shearing deformation capability to meet the requirements of the horizontal structure of the upper strucure and lattice structure so that the rubber supporting seat possess very good horizontal displacement, compression deformability and toeffectively reduce the damage to the building caused by cole-hot deformation force if the steel plaate and the horizontal wind force.

The operation principle if pan rubber supporting seat is to use the property of elastic rubber block in a semi-closed steel pan chamber that the elastic rubber possesses a nature of fluid when in the state of bearing in three directions to achieve the actuation of the upper structure while the low friction coefficient between the Tefion panel on the intermediate steel plate and the stainless steel plte upper seat is utilized to achieve the horizontal displacement of the upper struture. The load bearing capacity is 20 times greater than that of common supporting seat so the shortcoming of common rubber supporting seat of low bearing capacity. Great horizontal displacement and great rotated angle.