Heading 7302: Railway or tramway track construction material of iron or steel, the following: rails, check-rails and rack rails, switch blades, crossing frogs, point rods and other crossing pieces, sleepers (cross-ties), fishplates, chairs, chair wedges, sole plates (baseplates), rail clips, bedplates, ties and other material specialized for jointing or fixing rails:
Heading 7308: Structures (excluding prefabricated buildings of heading no.94.06) and parts of structures (for example, bridges and bridge-sections, lockgates, towers, lattice masts, roofs, roofrng frameworks, doors and windows and their frames and trresholds for doors, shutters, balustrades, pillars and columns), of iron or steel; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in structures, of iron or steel: