Abstract: A dual-skin structure (10, 210) comprises a first skin (12, 112, 212), a second skin (14, 114, 214) and an intermediate structure (16, 116, 216). The intermediate structure (16, 116, 216) comprises a plurality of first contact portions (18, 118, 218) connected to an interior surface of the first skin (12, 112, 212), a plurality of second contact portions (20, 120, 220) connected to an interior surface of the second skin (14, 114, 214) and a plurality of interconnecting web portions integral to the first (18, 118, 218) and second (20, 120, 220) contact portions and extending between ones of the first (18, 118, 218) and second (20, 120, 220) contact portions to form an internal supporting structure (16, 116, 216) alternating between the interior surfaces of the first (12, 112, 212) and second (14, 114, 214) skins.