Light steel sections, namely, lintels, plates, headers, trimmers, sills, noggins, braces, studs, joists, rafters, trusses, battens, beams, girders, ledgers, and blocking; Modular prefabricated steel wall framing; Rolled steel; Steel building materials, namely, lintels, plates, headers, trimmers, sills, noggins, braces, studs, joists, rafters, trusses, battens, beams, girders, plates, ledgers, and blocking; Steel prefabricated buildings; Structural cast steel; Structural steelwork, namely, lintels, plates, headers, trimmers, sills, noggins, braces, studs, joists, rafters, trusses, battens, beams, girders, plates, ledgers, and blocking; Building frameworks of metal; Channels of metal for use in constructing framed supports, namely, C, U, and Z-shaped metal channels; Devices of metal for fixing plane surfaces onto frame supports, namely, tie-downs, cleats, brackets, brick ties, and plate connectors; Fixed window frames of metal; Frames of metal for building; Frames of metal for construction work; Frames of metal for structures; Framework of metal for building; Frameworks of metal for rooms; Metal framed prefabricated buildings; Metal door frames; Metal building frames of rolled shapes; Metal frameworks for buildings; Metallic frames for buildings; Outdoor metal-framed transportable prefabricated buildings; Structural frames of metal for building; Metal materials for use in the construction of walls, namely, lintels, plates, headers, trimmers, sills, noggins, braces, studs, joists, battens, beams, girders, ledgers, and blocking; Metallic framing for walls; Metal hips for roofing; Metal materials for roofs, namely, metal sheeting, studs, joists, rafters, trusses, battens, beams, girders, ledgers, plates, beams, and blocking; Metal roof skeletons as framework; Prefabricated roof structures of metal as trusses; Prefabricated roof units of metal as trusses; Roof components of metal, namely, metal sheeting, studs, joists, rafters, trusses, battens, beams, girders, ledgers, plates, beams, and blocking; Roof construction materials of metal, namely, metal sheeting, studs, joists, rafters, trusses, battens, beams, girders, ledgers, plates, beams, and blocking; Roof purlins of metal; Roof ridges of metal; Roof structures of metal for supporting tiles, namely, trusses, battens, rafters, purlins, ridgeboards, and studs; Roof trusses of metal; Roofing joints of metal