Metal materials for building and construction; metal building products; formwork of metal; beams of common metal for formwork systems; clamps of metal for use in beam formwork; formwork beams of metal; formwork for concrete, of metal; formwork of metal; formwork supports of metal; formwork ties of metal; supports of metal for use in the building of formwork; supports of metal for use in the construction of formwork; metal formwork elements to provide penetration though cast concrete structures; metal edging; metal formwork elements to be cast in concrete.