By wire rope, ring network, (when required * small rockfall additional layer of wire grill), fixed system (anchor, anchor rope, dock and support rope) pressure ring and steel columns four major components . Combination of steel columns and steel wire rope connected to form a whole, for the protection of the area to form a protective surface, thereby preventing the collapse of falling rock soil, slope protection play a role. Usage: Suitable for building facilities near the buffer zone of high mountains, the rock fall, flying rocks, avalanches, mudslides * In addition to building facilities to avoid disaster destroyed the building facilities. Passive protection structure configuration: steel columns supporting rope, anchor rope that, stitching wire, vacuum ring.