Protective metal netting with interwoven wires, and a machine and a method for its manufacture

A protective metal netting comprising an array of straight extended elements predominantly in a main direction and bent or folded with alternating loops in a direction transverse to the main direction in order to be interwoven one with the other in interweave portions comprising only two interwoven extended elements, to thus create meshes of the metal netting, wherein the array of extended elements is made up of a first group of extended elements comprising a plurality of extended elements having a first strength, and of a second group of extended elements comprising at least one extended stiffening element having a second strength, greater than the first strength, wherein said interweave portions are defined by lines of respective extended elements which are twisted one around the other in a unidirectional twist direction, the at least one extended stiffening element of the second group of extended elements being interwoven with two adjacent extended elements and bent or folded with alternating loops substantially less pronounced in the transverse direction compared with the alternating loops with which the extended elements of the first group of extended elements are bent.