… piling of iron or steel, whether or not drilled, punched or made from assembled elements; welded angles, shapes and sections, of iron or steel. …
Explanatory notes
… piling of iron or steel, whether or not drilled, punched or made from assembled elements; welded angles, shapes and sections, of iron or steel. … types have, on the longitudinal sides at least, connecting devices (e.g. grooves, flanges, interlocks). This heading …