North Carolina-based Nucor Corporation (NUE) is a leading producer of structural steel, steel bars, joists, decks, and cold-finished bars. With a market cap of $36 billion, Nucor operates through steel mills, steel products, and raw materials segments. The steel manufacturer is expected to announce its Q3 earnings after the market closes on Monday, Oct. 21. Ahead of the event, analysts expect Nucor to report a profit of $1.39 per share, down 69.6% from $4.57 per share reported in the year-ago quarter. The company has surpassed Wall Street’s EPS estimates in three of the past four quarters whil…