SECTION XV - BASE METALS AND ARTICLES OF BASE METAL > CHAPTER 76 - ALUMINIUM AND ARTICLES THEREOF > 7610 Aluminium structures (excluding prefabricated buildings of heading 9406) and parts of structures (for example, bridges and bridge-sections, towers, lattice masts, roofs, roofing frameworks, doors and windows and their frames and thresholds for doors, balustrades, pillars and columns); aluminium plates, rods, profiles, tubes and the like, prepared for use in structures > Doors, windows and their frames and thresholds for doors