Fencing for primary airports or military bases with galvanized iron poles "T/50" with a double "bavolet" anti-climbing system at the top, bracings set up behind in galvanized iron "T/25", galvanized wire mesh finished with plastic-covering 50x50mm, H = 2000 mm, with smooth wires in tension, set in place using the cross of St. Andrea system, 8 lines of barbed wire and a "concertina," a wrapped spiral system of galvanized metal.