251123 Other structures and parts of structures, plates, rods, angles, shapes and the like, of iron, steel or aluminium

25112310 Iron or steel equipment for scaffolding, shuttering, propping/pit-propping including pit head frames and superstructures, extensible coffering beams, tubular scaffolding and similar equipment 25112330 Weirs, sluices, lock-gates, fixed landing stages, fixed docks and other maritime and waterway structures of iron or steel 25112350 Other structures principally of sheet: other 25112360 Other structures of iron or steel 25112370 Aluminium structure and parts of structures..., n.e.c.