PTFE sliding bearings, supports and guides are used in bridges, buildings, roofs, tunnels, pipe lines, heavy industry constructions, steel constructions and storage tank supports to eliminate and absorb expansions and contractions, vibrations, effects of earthquakes and changes in load. PTFE sliding bearings are produced as vested in steel, adhering to steel or mechanically adhering to steel. Bearings that are vested in steel are preferred in very high load applications. In the production of sliding bearings, Efalon^®(PTFE) skived tapes, etched one side are used.