US Patent 7234283 Knot of a retaining net

A method for making knots (4) of retaining nets (1), such as rock and avalanche fences, wherein a knot (4) consists of a first and a second rope (2,3) crossing over each other and a junction binding said ropes (6), comprises the steps of placing a first and a second U element (7,8) astride said first rope (2) and adjacent to said second rope (3) on opposite sides thereof, linking the ends (7d,7e) of the first U element (7) to the ends (8d,8e) of the second U element (8) by means of bridge elements (9d,9e) overlying said second rope (3), and clamping said second bridge elements (9d, 9e) on said second rope (3). With such a method a very strong and simple knot (4) can be speedily obtained.