6 Floor access covers of metal; shaft covers of metal, namely, fixed, removable, flexible and extendible doors, lids, mats, bridges, grilles, grates, plates, trellises, and coverings for the entrances and openings of maintenance shafts, access shafts, staircases, holes, pits and entry points; trapdoor units wholly or primarily of metal; metal tubing; metal pipes; metal pipe connectors; metal tube and metal pipe fittings; metal fittings for joining tubes and pipes together, and structures assembled from such tubes, pipes and fittings, namely, metal railings for bridges, metal scaffolding; perimeter protection structures in the nature of crash barriers of metal and perimeter protection barriers of metal in the nature of flexible, removable and extendible mats, trellises and manhole covers for safety purposes; metal railings, metal hand rails, metal door handles, metal hand railing stands; metal guard rails, balustrades of metal; support brackets of metal, namely, mounting brackets for general use, spacer brackets, cantilevered brackets, brackets for building; Counterbalances in the nature of counterweight arbor assemblies in the nature of frameworks with weights in it made primarily of metal and also sometimes including non-metal parts, for use assisting with the manually powered lifting by means of ropes, cables and/or chains of people and equipment; anchor blocks, namely, metal based weights, namely, metal throw weights for commercial or industrial use; metal clamps; barriers in the nature of portable metal free-standing barriers, safety crash barriers of metal; shaped channel sections of metal, namely, metal beams; hollowed sections in the nature of hollow steel bars and metal beams; stair treads; gratings of metal; industrial flooring made of common metal and its alloys; metal gangways in the nature of removable, flexible and extendible bridges, grilles, grates, trellises; nuts of metal and bolts of metal; anchors and anchoring systems comprised of anchors and also including anchoring ropes; mainly metallic freestanding demarcation systems comprised of metal posts, metal chains, and non-metal chains; grills of metal for safety purposes in the nature of fixed, removable, flexible and extendible metal gratings, mats; safety scaffolding of metal; podiums in the nature of prefabricated metal platforms; gantry structures, namely, metal holders for signs; metal scaffolding; scaffolding towers of metal; work platforms in the nature of scaffolding of metal; access platforms in the nature of scaffolding of metal; mobile aerial work platforms in the nature of scaffolding of metal; replacement and structural parts and fittings for all of the aforesaid in the nature of metal bolts, metal anchors, metal joinery fittings; all of the aforesaid goods made of metal