Metal building materials, in particular semi-finished goods of aluminium, semi-finished goods of metal including semi-finished sections and in particular sections of extruded aluminium all the aforementioned goods with the exception of formwork supports, formwork tables, perimiter tables, slab forming system, wallforming systems, props, jack props, push-pull props, support towers, wedge jacks, stair towers, formwork girders, beam forms, column forms, formwork ties, turnbuckles, formwork accessories, recoverable anchor screws, jack tensioners, storage racks, rail posts, trenching struts, trenching lining systems, injection bore anchors, anchor piles, grouted piles, soil nails, rockbolts and parts of all aforementioned goods