BUILDING SPECIALTIES FOR CONCRETE, REINFORCED CONCRETE, MASONRY, AND OTHER CONSTRUCTIONS-NAMELY, CONCRETE INSERTS AND ANCHORS AND ACCESSORIES THEREFOR; MASONRY ANCHORS, JOINTS, FLASHINGS, TIES, AND REINFORCEMENTS; CONCRETE REINFORCING SUPPORTS AND CONNECTORS-NAMELY, BAR MAT CHAIRS, BAR SUPPORTS, SPACERS, TIES, AND TWISTERS, DOWEL BAR CHAIRS, DOWEL CAPS AND STAKES, CLAMP SPLICES FOR REINFORCING BARS, HAUNCH STIFFENERS, REED CLIPS, SCREED CHAIRS AND HOLDERS, TIE WIRE AND TIE WIRE HOLDERS; CONCRETE FORMS AND ATTACHMENTS-NAMELY, BAND IRON, BEAM CLAMPS, BEAM SADDLES, STEEL FORMS FOR BRIDGE COLUMNS, CONCRETE JOIST FLOORS, AND CAPITALS, HANGERS, CLAMPS, CONTINUOUS THREADED ROD, CURING BLANKETS, FIBER FORMS FOR SLAB PERIMETER HEATING, CONCRETE COLUMNS, AND VOIDS, WALL PLUGS, POLYETHYLENE FILM, REGLET, ROD COUPLINGS, SCAFFOLDING AND SHORING, ANCHORS, SPACERS, WATER STOPS AND ACCESSORIES THEREFOR; PIPE HANGERS, CLAMPS, SUPPORTS, BRACKETS, CLIPS, HOOKS, STRAPS, RINGS, SOCKETS, SADDLES, HANGER RODS, AND ACCESSORIES THEREFOR