Method for making spacer structures, each spacer structure being made by joining at least one longitudinal element, preferably at least one pair of longitudinal elements suitably spaced and parallel, to at least one transversal element, preferably to a plurality of transversal elements appropriately spaced and parallel, characterized in that it comprises the steps of: (a). providing a first supply assembly and a second supply assembly for supplying said longitudinal elements along a longitudinal direction, each comprising at least one supply device (5, 6) for a said longitudinal element; (b). arranging along a transversal direction to said longitudinal direction an insertion channel for a transversal element, an insertion assembly for inserting at least one said transversal element at a time into said insertion channel, and a cutting assembly associated with said insertion assembly, for cutting said transversal element inserted, in correspondence of a cutting plane (30a, 30b) transversal to said insertion channel; (c). providing a joining assembly configured to cooperate with said first supply assembly and/or with said second supply assembly, comprising at least one joining unit (41, 42) for joining one said longitudinal element to one said transversal element; (d). forming a first spacer structure by the cooperation of said first supply assembly, said insertion assembly, said cutting assembly and said joining assembly; (e). releasing said formed first structure; characterised in that said cutting plane delimits an operating area inside which said spacer structure is formed at step (d), and a drop-off area for at least one of said first supply assembly and said second supply assembly of said longitudinal elements; the method further comprising after releasing said formed first structure the steps of: (f). moving said first supply assembly along said transversal direction into said drop-off area and (g). moving said second supply assembly along said transversal direction inside said operating area to a desired position; (h). forming by means of the cooperation of said second supply assembly, said insertion assembly, said cutting assembly and said joining assembly a second spacer structure, while said first supply assembly is located into said drop-off area, outside said operating area. (a). providing a first supply assembly and a second supply assembly for supplying said longitudinal elements along a longitudinal direction, each comprising at least one supply device (5, 6) for a said longitudinal element; (b). arranging along a transversal direction to said longitudinal direction an insertion channel for a transversal element, an insertion assembly for inserting at least one said transversal element at a time into said insertion channel, and a cutting assembly associated with said insertion assembly, for cutting said transversal element inserted, in correspondence of a cutting plane (30a, 30b) transversal to said insertion channel; (c). providing a joining assembly configured to cooperate with said first supply assembly and/or with said second supply assembly, comprising at least one joining unit (41, 42) for joining one said longitudinal element to one said transversal element; (d). forming a first spacer structure by the cooperation of said first supply assembly, said insertion assembly, said cutting assembly and said joining assembly; (e). releasing said formed first structure; (f). moving said first supply assembly along said transversal direction into said drop-off area and (g). moving said second supply assembly along said transversal direction inside said operating area to a desired position; (h). forming by means of the cooperation of said second supply assembly, said insertion assembly, said cutting assembly and said joining assembly a second spacer structure, while said first supply assembly is located into said drop-off area, outside said operating area.