Exhibit 99.1

                  Certification of Principal Executive Officer
                           Pursuant to 18 U.S.C. 1350
                 (Section 906 of the Sarbanes-Oxley Act of 2002)

I, Daniel R. DiMicco, Vice Chairman, President and Chief Executive Officer
(principal executive officer) of Nucor Corporation (the "Registrant"), certify,
to the best of my knowledge, based upon a review of the Quarterly Report on Form
10-Q for the period ended September 28, 2002 of the Registrant (the "Report"),
that:

         (1)  The Report fully complies with the requirements of Section 13(a)
of the Securities Exchange Act of 1934, as amended; and

         (2)  The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Registrant.


  /s/ Daniel R. DiMicco
--------------------------------
Name:  Daniel R. DiMicco
Date:  November 8, 2002