Fabricated metal equipment and devices used in and by the building industry and contained in class 6, such equipment and devices including scaffolding; shoring; joists; and all other construction related products such as tubes, clamps, couplers, trusses, wallforms, beams,ledgers, swing stages, scaffold planks, safety fences and posts, fence hooks, disposal chutes, strongbacks, work platforms and lift platforms and parts therefore included in this class.