6 Common metals and their alloys; metal building material; transportable structures of metal; metal scaffolding and metal components for use therewith; frames of metal; metal flooring; trapdoor units wholly or partially of metal; Articles of metal for avoiding and arresting the fall of persons from heights, namely, anchors, anchor points, crawling board clamps, ladder hooks, anchor weights, and structural parts and fittings for all of the aforesaid goods; anchors and anchoring systems, namely, anchors, anchor points, metal cable wire, metal clips for avoiding and arresting the fall of persons from heights, metal clamps, metal strapping, and metal tie downs; fixing, fastening, clamping and anchoring devices, namely, metal threaded fasteners, anchors, metal clamps, metal clips for avoiding and arresting the fall of persons from heights, and metal threaded fasteners; metal ladder hooks, clamps, brackets, ladder tie downs, eye bolts, and metal pedestals, namely, metal posts, construction support elements made of metal, and metal anchor throw weights for commercial or industrial use; perimeter protection systems, namely, metal pipes, metal tubes, metal clamps, metal fences, and metal barrier rails; metal tubing; metal pipes; metal pipe connectors; metal tube and metal pipe fittings; metal railings for forming roof edge barriers, balconies, bridges, and work platforms; metal guard barriers for pedestrian control, marking hazardous areas, and metal roof edge fencing; portable metal free-standing safety guard barriers; metal hand rails, metal handles for doors, for aiding climb and grip in building and roof top working; metal guard rails; metal clamps; metal stair treads; metal gratings; free standing demarcation systems, namely, metal barriers for pedestrian traffic control, metal railings, metal chains, metal poles and metal anchor throw weights for commercial or industrial use, all used as temporary structures to separate designated areas or potential hazards