What are the nets one sees on rockfaces or hillsides abutting railway lines in some areas?

19-07-2019

In areas where rock falls or landslides are common, IR uses meshes or nets fixed to the rockfaces or the hillsides -- these are 'stitched' to the hillside at frequent intervals. They act to trap and stop, or slow down falling or sliding rocks and boulders so that they either do not fall all the way down, or lose their kinetic energy and fall without infringing the tracks. Generally the nets are made of polypropylene ropes of 10mm-16mm diameter with high thermal, abrasion, and ultraviolet resistance. The mesh size is from 100mm to 300mm depending on the area, and the typical size of the fractured or falling rocks. These are appropriate for retaining and slowing small to medium sized

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