The main parts of a friction pendulum isolator are an upper backing plate, a slider and an articulated housing plate. The surface slider between the upper plate and the slider is called the 1st surface slider . It is the curvature of this surface that determines the natural frequency of the whole structure.
The slider and the housing plate form an articulated joint, keeping the upper and lower structure horizontal. Durable sliding material such as stainless steel, polymer materials and zinc coating, will be used on each sliding surface, depending on different specifications for the frictional coefficient and effective damping ratio.
Compared to other isolators, CSS has following advantages: