Panels which may be welded, made primarily of aluminum or aluminum alloys, for use in the transport industry, to make floors, frames, fuselages, containers, walls, roofs, decks and loading platforms in aeroplanes, boats, cars, trucks, busses, silo's, buildings, bridges and trains; Panels which may be welded, made primarily of aluminum or aluminum alloys, for use in fixed or transportable bridges, tunnels, temporary or fixed building constructions, temporary or fixed traffic lanes