Beams of common metal for building; Beams of common metal for scaffolding; Beams of metal; Decking boards of metal; Fasteners of metal for scaffolds; Materials of metal for scaffolds; Metal beams; Metal brackets for use in the construction and assembly of decking; Metal connectors for decking and decking joists; Metal floor decking; Metal roof decking; Metal scaffolding; Metal structural beams; Scaffolding of metal; Scaffolding towers of metal