6 Building materials, namely, kits for constructing pre-engineered decks comprised primarily of metallic deck substructure system materials, and secondarily of metallic parts and fittings for constructing decks, namely, starter and termination-cast material, interior joists, joist retainer tabs, finishing joists, fascia, beams, posts, post beam connectors, beam to beam connectors, joist beam connectors, finishing joist to fascia brackets, joist to stringer brackets, stair stringers, tread supports, rear tread supports, toe kicks, newel posts, hand rails and stair railings, railing connectors, hand rail and stair rail pickets, rail corners, rail joiners, rail house brackets, corner spring clips, stringer retainer clips, stringer retainer brackets, deck board clips, pinch brackets, nuts, bolts, rivets, and screws