Document:

<PAGE>

                                                      Nucor Corporation
                                                      Form 10-Q
                                                      June 30, 2001
                                                      Exhibit 10.1

                         EXECUTIVE EMPLOYMENT AGREEMENT

     THIS AGREEMENT is made and entered into between Nucor Corporation, a
Delaware corporation, on behalf of itself and its affiliates (collectively
"Nucor"), and Daniel R. DiMicco, a resident of Waxhaw, North Carolina (the
"Employee").

     WHEREAS, Employee has been employed as an "at-will" employee of Nucor, and
the parties wish to formalize their employment relationship in writing and for
Nucor to continue Employee's employment under the terms and conditions set forth
below;

     WHEREAS, Employee and Nucor previously entered into an "Agreement Not to
Compete" dated as of September 19, 1999;

     WHEREAS, Employee and Nucor now wish to substitute this Employment
Agreement for the previous "Agreement Not to Compete";

     NOW, THEREFORE, in consideration for the promises and mutual agreements
contained herein, the parties agree as follows:

     1.  Employment.  Nucor agrees to continue to employ Employee in the
         ----------
position of President and Chief Executive Officer, and Employee agrees to accept
continued employment in this position, subject to the terms and conditions set
forth in this Agreement.

     2.  Signing Payment.  Nucor will pay Employee a one-time $10,000 amount for
         ---------------
executing this Agreement.  This $10,000 will become due and payable to Employee
upon Employee's execution of this Agreement.

     3.  Compensation and Benefits During Employment.  Nucor will provide the
         -------------------------------------------
following compensation and benefits to Employee:

     (a.) Nucor will pay Employee a base salary of $412,500 per year, paid on a
monthly basis, subject to withholding by Nucor and other deductions as required
by law.  This amount is subject to adjustment up or down by Nucor's Board of
Directors at its sole discretion and without notice to Employee.

     (b.) Employee will be eligible for bonuses based on the Senior Officer
Incentive Compensation Plans, as modified from time to time by, and in the sole
discretion of, the Board of Directors of Nucor.

     (c.) Employee will be eligible for those employee benefits that are
generally made available by Nucor to its employees.
<PAGE>

     (d.) Employee shall be eligible to participate in the Key Employees
Incentive Stock Option Plan (the "Option Plan") in accordance with the
applicable terms and conditions of the Option Plan and a Key Employee Stock
Option Certificate issued to Employee.

     4.  Compensation Following Termination.
         -----------------------------------

     (a.) From the date of Employee's termination, whether by Employee or Nucor
for any or no reason, Nucor will pay Employee a monthly amount for twenty-four
(24) months following Employee's termination.  The monthly amount will be
computed using the following formula:  the amount of Employee's highest base
salary level during the prior twelve months multiplied by 3.36 and the product
divided by twelve.  The payments shall be made at the end of each month
following Employee's termination on Nucor's regular monthly payroll date.

     (b.) In exchange for Nucor's promises in this Section 4 and other good and
valuable consideration, Employee agrees to strictly abide by the terms of
Sections 10, 11, and 13 of this Agreement.  If Employee fails to strictly abide
by the terms of Sections 10, 11, and 13 of this Agreement, Nucor may, at its
option, do any or all of the following:  (i) pursue any legal remedies available
to it (including but not limited to injunctive relief, damages, and specific
performance), and (ii) declare the monthly payment forfeited with respect to any
month during which Employee is in breach of this Agreement.  Nucor may declare
the monthly payment forfeited if Employee is in breach of this Agreement for any
portion of the month at issue, and Employee will not be entitled to a payment
for that month.

     (c.) If Employee is employed by Nucor at the time of Employee's death,
Nucor's obligations to make any monthly payments under this Agreement will
automatically terminate and Employee's estate and executors will have no rights
to payments under this Agreement.  If Employee dies during the first twelve
months following Employee's termination from employment with Nucor, then Nucor
will pay Employee's estate the monthly payments through the end of the twelfth
month following Employee's termination.  If Employee dies twelve or more months
after termination of Employee's employment with Nucor, then Nucor's obligations
to make monthly payments under this Agreement will automatically terminate
without the necessity of Nucor providing written notice.

     5.  Duties and Responsibilities; Best Efforts.  While employed by Nucor,
         ------------------------------------------
Employee shall perform such duties for and on behalf of Nucor as may be
determined and assigned to Employee from time to time by members of Nucor's
Board of Directors.  Employee shall devote his full time and best efforts to the
business and affairs of Nucor.  During the term of Employee's employment with
Nucor, Employee will not undertake other paid employment or engage in any other
business activity without prior written consent of Nucor.

     6.  Employment at Will.  The parties acknowledge and agree that this
         ------------------
Agreement does not create employment for a definite term and that Employee's
employment with Nucor is terminable by Nucor or Employee at any time, with or
without cause and with or without notice, unless otherwise expressly set forth
in a separate written agreement executed by Employee and Nucor after the date of
this Agreement.
<PAGE>

     7.  Change in Employee's Position.  In the event that Nucor transfers,
         -----------------------------
demotes, promotes, or otherwise changes Employee's compensation or position with
Nucor, the restrictions and post-termination obligations of this Agreement shall
remain in full force and effect on both parties.

     8.  Recognition of Nucor's Legitimate Interests.  Employee understands and
         -------------------------------------------
acknowledges that Nucor and its affiliates compete in North America in the
research, manufacture, marketing, sale and distribution of steel and steel
products, including but not limited to flat-rolled steel, steel shapes,
structural steel, steel plate, steel joists and girders, steel deck, steel
fasteners, and metal building systems.  As part of Employee's employment with
Nucor, Employee will be provided significant Confidential Information by Nucor
(as defined below).  In addition, Employee will have direct contact with Nucor's
customers, in which capacity he is expected to develop good relationships with
such customers.  Employee acknowledges that Nucor's competitors would obtain an
unfair advantage if Employee disclosed the Confidential Information to a
competitor, used it in a competitor's behalf, or if he were able to exploit the
relationships he developed as an employee of Nucor to solicit business on behalf
of a competitor.

     9.  Definition of Confidential Information.  As used in this Agreement,
         --------------------------------------
Confidential Information shall include, without limitation, financial and
budgetary information and strategies; plant design, specifications, and layouts;
equipment design, specifications, and layouts; product design and
specifications; manufacturing processes, procedures, and specifications; data
processing or other computer programs; research and development projects;
marketing information and strategies; customer lists; vendor lists; information
about customer preferences and buying patterns; information about prospective
customers, vendors, or business opportunities; information about Nucor's costs
and the pricing structure used in sales to customers; information about Nucor's
overall corporate business strategy; and technological innovations used in the
business.

     10.  Agreement to Maintain Confidentiality.
          -------------------------------------

     (a.) Except as otherwise provided in this Agreement, during Employee's
employment with Nucor and at all times after the termination of Employee's
employment, Employee covenants and agrees to treat as confidential and not to
negligently or intentionally disclose, and to use only for the advancement of
the interests of Nucor, all Confidential Information submitted to the Employee
or received, compiled, developed, designed, produced, accessed, or otherwise
discovered by the Employee from time to time while employed by Nucor.  Employee
will not disclose or divulge the Confidential Information to any person, entity,
firm or company whatsoever or use the Confidential Information for Employee's
own benefit or for the benefit of any person, entity, firm or company other than
Nucor.

     (b.) Employee specifically acknowledges that the Confidential Information,
whether reduced to writing or maintained in the mind or memory of Employee, and
whether compiled or created by Employee, Nucor, or any of its affiliates or
customers, derives independent economic value from not being readily known to or
ascertainable by proper means by others who could obtain economic value from the
disclosure or use of the Confidential Information.  Employee also acknowledges
that reasonable efforts have been put forth by Nucor to maintain the secrecy
<PAGE>

of the Confidential  Information,  that the Confidential Information is and will
remain the sole property of Nucor or any of its affiliates or customers,  as the
case may be,  and that any  retention  and/or  use of  Confidential  Information
during or after the  termination of Employee's  employment with Nucor (except in
the  regular  course of  performing  his duties  hereunder)  will  constitute  a
misappropriation of the Confidential Information belonging to Nucor.

     (c.) Employee's obligations under this Section 10 will survive termination
of his employment and will continue indefinitely.  For purposes of this Section,
information shall not be deemed to be "Confidential Information" to the extent
that the information (i) is in the public domain, or hereafter becomes generally
known or available through no action or omission on the part of Employee; (ii)
is furnished to any person by Nucor without restriction on disclosure; (iii)
becomes known to the Employee from a source other than Nucor, without a breach
of any agreement with Nucor and without any restriction on disclosure; (iv) is
required to be disclosed by judicial action, provided, however, that prompt
notice of said judicial action shall have been given to Nucor and that efforts
to avoid disclosure shall have been exhausted; or (v) is disclosed after written
approval for the disclosure has been given by Nucor.

     11.  Noncompetition.
          ---------------

     (a.) Employee hereby agrees that for the duration of Employee's employment
with Nucor, and for a period of twenty-four (24) months thereafter, Employee
will NOT, within the Restricted Territory, do any of the following:

          (1) Engage directly or indirectly (either as an owner, employee,
     consultant, or in any similar capacity) in the research, development,
     manufacture, marketing, sale, or distribution of steel or steel products
     which are the same as or similar to those in development, manufactured,
     and/or sold by Nucor on the date of Employee's termination.

          (2) Solicit or encourage any customers of Nucor (a) with whom Employee
     had direct contact during the last twelve (12) months of Employee's
     employment with Nucor, and (b) who remain Nucor customers at the time of
     solicitation, to purchase steel or steel products from any entity other
     than Nucor.

          (3) Encourage, induce, or attempt to induce any employees of Nucor (a)
     with whom Employee had direct contact during the last twelve (12) months of
     Employee's employment with Nucor, and (b) who remain employed by Nucor at
     the time of the attempted inducement, to end their employment relationship
     with Nucor.

     (b.) As used in this provision, "Restricted Territory" shall mean the
following:

          (1) The United States, Canada, and Mexico.

          (2) If the definition in subparagraph (b)(1) is found to be
     unreasonable with respect to subparagraph (a)(1), (a)(2), or (a)(3) of this
     Section 11, then with regard to such subparagraph, the term "Restricted
     Territory" shall mean the United States.
<PAGE>

          (3) If the definitions in subparagraphs (b)(1) and (b)(2) are found to
     be unreasonable with respect to subparagraph (a)(1), (a)(2), or (a)(3) of
     this Section 11, then with regard to such subparagraph, the term
     "Restricted Territory" shall mean each state in the United States in which
     Nucor has a manufacturing facility or plant on the date of the termination
     of Employee's employment with Nucor (at the time of entry into this
     Agreement, these states include North Carolina, South Carolina, Texas,
     Alabama, Arkansas, Nebraska, Utah, Indiana, and New York).

     (c.) Employee specifically agrees that the post-termination restrictions in
this Section 11 will apply to Employee regardless of whether termination of
employment is initiated by Nucor or Employee and regardless of the reason for
termination of Employee's employment.  Further, Employee acknowledges and agrees
that Nucor's payment of the compensation described in Section 4 is intended to
compensate Employee for the limitations on Employee's competitive activities
described in this Section 11 for the two-year period following Employee's
employment with Nucor regardless of the reason for termination.  Thus, for
example, in the event that Nucor terminates Employee's employment without cause,
Employee expressly agrees that the restrictions in this Section 11 will apply to
Employee notwithstanding the reasons or motivations of Nucor in terminating
Employee's employment.

     12.  Severability.  It is the intention of the parties to restrict the
          -------------
activities of Employee only to the extent reasonably necessary for the
protection of Nucor's legitimate interests.  The parties specifically covenant
and agree that should any of the provisions in this Agreement be deemed by a
court of competent jurisdiction too broad for the protection of Nucor's
legitimate interests, the parties authorize the court to narrow, limit or modify
the restrictions herein to the extent reasonably necessary to accomplish such
purpose.  In the event such limiting construction is impossible, such invalid or
unenforceable provision shall be deemed severed from this Agreement and every
other provision of this Agreement shall remain in full force and effect.

     13.  Assignment of Intellectual Property Rights.
          -------------------------------------------

     (a.) Employee hereby assigns to Nucor Employee's entire right, title and
interest, including copyrights and patents, in any idea, invention, design of a
useful article (whether the design is ornamental or otherwise), and any other
work of authorship (collectively the "Developments"), made or conceived during
Employee's employment by Nucor solely or jointly by Employee, or created wholly
or in part by Employee, whether or not such Developments are patentable,
copyrightable or susceptible to other forms of protection, where the
Developments:  (i) relate to Nucor's actual or anticipated business or research
or development, or (ii) are suggested by or result from any work performed by
Employee on Nucor's behalf.

     (b.) In connection with any of the Developments assigned in subparagraph
(a) above:  (i) Employee will promptly disclose them to Nucor's management; and
(ii) Employee will, on Nucor's request, promptly execute a specific assignment
of title to Nucor or its designee, and do anything else reasonably necessary to
enable Nucor or its designee to secure a patent, copyright, or other form of
protection therefore in the United States and in any other applicable country.
<PAGE>

     14.  Enforcement.  In addition to any other remedies available to Nucor,
          ------------
the provisions of this Agreement may be enforced by injunction to (a) restrain
any violation by Employee, Employee's partners, agents, servants, employers, and
employees, and all persons acting for or with Employee, and (b) to compel
specific performance of the terms and conditions of this Agreement.  Employee
represents and acknowledges that in the event of the termination of Employee's
employment for any reason, Employee's experience and capabilities are such that
Employee can obtain employment and that enforcement of this Agreement by way of
injunction will not prevent Employee from earning a livelihood.

     15.  Reasonableness of Restrictions.  Employee has carefully considered the
          ------------------------------
nature and extent of the restrictions upon him and the rights and remedies
conferred upon Nucor under Sections 4, 10, 11, 13, and 14 and hereby
acknowledges and agrees that the same are reasonable in time and territory, are
designed to eliminate competition which would otherwise be unfair to Nucor, do
not interfere with Employee's exercise of his inherent skill and experience, are
reasonably required to protect the legitimate interests of Nucor, and do not
confer a benefit upon Nucor disproportionate to the detriment to the Employee.
Employee certifies that he has had the opportunity to discuss this Agreement
with such legal advisors as he chooses and that he understands its provisions
and has entered into this Agreement freely and voluntarily.

     16.  Applicable Law.  This Agreement shall be interpreted, construed and
          --------------
governed according to the laws of the State of North Carolina, regardless of
choice of law principles to the contrary.  Further, Nucor and Employee agree
that in any dispute between them jurisdiction and venue are appropriate in
Mecklenburg County, North Carolina.

     17.  Employee to Return Property.  Employee agrees that upon (a) the
          ---------------------------
termination of Employee's employment with Nucor, whether by Employee or Nucor
for any reason (with or without cause), or (b) the written request of Nucor,
Employee (or in the event of the death or disability of Employee, Employee's
heirs, successors, assigns and legal representatives) shall return to Nucor any
and all property of Nucor, including but not limited to all Confidential
Information, notes, data, tapes, computers, lists, reference items, phones,
documents, sketches, drawings, software, product samples, rolodex cards, forms,
manuals, and equipment, without retaining any copies or summaries of such
property.

     18.  Entire Agreement; Amendments.  This Agreement discharges and cancels
          ----------------------------
all previous agreements and constitutes the entire agreement between the parties
with regard to the subject matter hereof.  No agreements, representations, or
statements of any party not contained herein shall be binding on either party.
Further, no amendment or variation of the terms or conditions of this Agreement
shall be valid unless in writing and signed by both parties.

     19.  Assignability.  This Agreement and the rights and duties created
          -------------
hereunder shall not be assignable or delegable by Employee.  Nucor may, at its
option and without consent of Employee, assign its rights and duties hereunder
to any successor entity or transferee of Nucor's assets.

     20.  Binding Effect.  This Agreement shall be binding upon and inure to the
          --------------
benefit of Nucor and Employee and their respective successors, assigns, heirs
and legal representatives.
<PAGE>

     21.  No Waiver.  No failure or delay by any party to this Agreement to
          ---------
enforce any right specified in this Agreement will operate as a waiver of such
right, nor will any single or partial exercise of a right preclude any further
or later enforcement of the right within the period of the applicable statute of
limitations.

     IN WITNESS WHEREOF, the parties have executed this Agreement on the dates
specified below.

                              DANIEL R. DIMICCO

                              /s/ Daniel R. DiMicco
                              ---------------------------------
                              Daniel R. DiMicco

                              Date:       April 10, 2001
                                    ---------------------------

                              NUCOR CORPORATION

                              By:   /s/ Terry S. Lisenby
                                  -----------------------------

                              Its:   Executive Vice President
                                   ----------------------------

                              Date:      April 10, 2001
                                    ---------------------------<PAGE>

                                                      Nucor Corporation
                                                      Form 10-Q
                                                      June 30, 2001
                                                      Exhibit 10.2

                         EXECUTIVE EMPLOYMENT AGREEMENT

     THIS AGREEMENT is made and entered into between Nucor Corporation, a
Delaware corporation, on behalf of itself and its affiliates (collectively
"Nucor"), and Terry S. Lisenby, a resident of Charlotte, North Carolina (the
"Employee").

     WHEREAS, Employee has been employed as an "at-will" employee of Nucor, and
the parties wish to formalize their employment relationship in writing and for
Nucor to continue Employee's employment under the terms and conditions set forth
below;

     WHEREAS, Employee and Nucor previously entered into an "Agreement Not to
Compete" dated as of September 19, 1999;

     WHEREAS, Employee and Nucor now wish to substitute this Employment
Agreement for the previous "Agreement Not to Compete";

     NOW, THEREFORE, in consideration for the promises and mutual agreements
contained herein, the parties agree as follows:

     1.  Employment.  Nucor agrees to continue to employ Employee in the
         ----------
position of Executive Vice President and Chief Financial Officer, and Employee
agrees to accept continued employment in this position, subject to the terms and
conditions set forth in this Agreement.

     2.  Signing Payment.  Nucor will pay Employee a one-time $10,000 amount for
         ---------------
executing this Agreement.  This $10,000 will become due and payable to Employee
upon Employee's execution of this Agreement.

     3.  Compensation and Benefits During Employment.  Nucor will provide the
         -------------------------------------------
following compensation and benefits to Employee:

     (a.) Nucor will pay Employee a base salary of $298,300 per year, paid on a
monthly basis, subject to withholding by Nucor and other deductions as required
by law.  This amount is subject to adjustment up or down by Nucor's Board of
Directors at its sole discretion and without notice to Employee.

     (b.) Employee will be eligible for bonuses based on the Senior Officer
Incentive Compensation Plans, as modified from time to time by, and in the sole
discretion of, the Board of Directors of Nucor.

     (c.) Employee will be eligible for those employee benefits that are
generally made available by Nucor to its employees.
<PAGE>

     (d.) Employee shall be eligible to participate in the Key Employees
Incentive Stock Option Plan (the "Option Plan") in accordance with the
applicable terms and conditions of the Option Plan and a Key Employee Stock
Option Certificate issued to Employee.

     4.  Compensation Following Termination.
         -----------------------------------

     (a.) From the date of Employee's termination, whether by Employee or Nucor
for any or no reason, Nucor will pay Employee a monthly amount for twenty-four
(24) months following Employee's termination.  The monthly amount will be
computed using the following formula:  the amount of Employee's highest base
salary level during the prior twelve months multiplied by 3.36 and the product
divided by twelve.  The payments shall be made at the end of each month
following Employee's termination on Nucor's regular monthly payroll date.

     (b.) In exchange for Nucor's promises in this Section 4 and other good and
valuable consideration, Employee agrees to strictly abide by the terms of
Sections 10, 11, and 13 of this Agreement.  If Employee fails to strictly abide
by the terms of Sections 10, 11, and 13 of this Agreement, Nucor may, at its
option, do any or all of the following:  (i) pursue any legal remedies available
to it (including but not limited to injunctive relief, damages, and specific
performance), and (ii) declare the monthly payment forfeited with respect to any
month during which Employee is in breach of this Agreement.  Nucor may declare
the monthly payment forfeited if Employee is in breach of this Agreement for any
portion of the month at issue, and Employee will not be entitled to a payment
for that month.

     (c.) If Employee is employed by Nucor at the time of Employee's death,
Nucor's obligations to make any monthly payments under this Agreement will
automatically terminate and Employee's estate and executors will have no rights
to payments under this Agreement.  If Employee dies during the first twelve
months following Employee's termination from employment with Nucor, then Nucor
will pay Employee's estate the monthly payments through the end of the twelfth
month following Employee's termination.  If Employee dies twelve or more months
after termination of Employee's employment with Nucor, then Nucor's obligations
to make monthly payments under this Agreement will automatically terminate
without the necessity of Nucor providing written notice.

     5.  Duties and Responsibilities; Best Efforts.  While employed by Nucor,
         ------------------------------------------
Employee shall perform such duties for and on behalf of Nucor as may be
determined and assigned to Employee from time to time by members of Nucor's
Board of Directors.  Employee shall devote his full time and best efforts to the
business and affairs of Nucor.  During the term of Employee's employment with
Nucor, Employee will not undertake other paid employment or engage in any other
business activity without prior written consent of Nucor.

     6.  Employment at Will.  The parties acknowledge and agree that this
         ------------------
Agreement does not create employment for a definite term and that Employee's
employment with Nucor is terminable by Nucor or Employee at any time, with or
without cause and with or without notice, unless otherwise expressly set forth
in a separate written agreement executed by Employee and Nucor after the date of
this Agreement.
<PAGE>

     7.  Change in Employee's Position.  In the event that Nucor transfers,
         -----------------------------
demotes, promotes, or otherwise changes Employee's compensation or position with
Nucor, the restrictions and post-termination obligations of this Agreement shall
remain in full force and effect on both parties.

     8.  Recognition of Nucor's Legitimate Interests.  Employee understands and
         -------------------------------------------
acknowledges that Nucor and its affiliates compete in North America in the
research, manufacture, marketing, sale and distribution of steel and steel
products, including but not limited to flat-rolled steel, steel shapes,
structural steel, steel plate, steel joists and girders, steel deck, steel
fasteners, and metal building systems.  As part of Employee's employment with
Nucor, Employee will be provided significant Confidential Information by Nucor
(as defined below).  In addition, Employee will have direct contact with Nucor's
customers, in which capacity he is expected to develop good relationships with
such customers.  Employee acknowledges that Nucor's competitors would obtain an
unfair advantage if Employee disclosed the Confidential Information to a
competitor, used it in a competitor's behalf, or if he were able to exploit the
relationships he developed as an employee of Nucor to solicit business on behalf
of a competitor.

     9.  Definition of Confidential Information.  As used in this Agreement,
         --------------------------------------
Confidential Information shall include, without limitation, financial and
budgetary information and strategies; plant design, specifications, and layouts;
equipment design, specifications, and layouts; product design and
specifications; manufacturing processes, procedures, and specifications; data
processing or other computer programs; research and development projects;
marketing information and strategies; customer lists; vendor lists; information
about customer preferences and buying patterns; information about prospective
customers, vendors, or business opportunities; information about Nucor's costs
and the pricing structure used in sales to customers; information about Nucor's
overall corporate business strategy; and technological innovations used in the
business.

     10.  Agreement to Maintain Confidentiality.
          -------------------------------------

     (a.) Except as otherwise provided in this Agreement, during Employee's
employment with Nucor and at all times after the termination of Employee's
employment, Employee covenants and agrees to treat as confidential and not to
negligently or intentionally disclose, and to use only for the advancement of
the interests of Nucor, all Confidential Information submitted to the Employee
or received, compiled, developed, designed, produced, accessed, or otherwise
discovered by the Employee from time to time while employed by Nucor.  Employee
will not disclose or divulge the Confidential Information to any person, entity,
firm or company whatsoever or use the Confidential Information for Employee's
own benefit or for the benefit of any person, entity, firm or company other than
Nucor.

     (b.) Employee specifically acknowledges that the Confidential Information,
whether reduced to writing or maintained in the mind or memory of Employee, and
whether compiled or created by Employee, Nucor, or any of its affiliates or
customers, derives independent economic value from not being readily known to or
ascertainable by proper means by others who could obtain economic value from the
disclosure or use of the Confidential Information.  Employee also acknowledges
that reasonable efforts have been put forth by Nucor to maintain the secrecy of
the Confidential Information, that the Confidential Information is and will
remain the sole property of Nucor or any of its affiliates or customers, as the
case may be, and that any retention and/or use
<PAGE>

of  Confidential  Information  during or after  the  termination  of  Employee's
employment  with Nucor (except in the regular  course of  performing  his duties
hereunder) will constitute a  misappropriation  of the Confidential  Information
belonging to Nucor.

     (c.) Employee's obligations under this Section 10 will survive termination
of his employment and will continue indefinitely.  For purposes of this Section,
information shall not be deemed to be "Confidential Information" to the extent
that the information (i) is in the public domain, or hereafter becomes generally
known or available through no action or omission on the part of Employee; (ii)
is furnished to any person by Nucor without restriction on disclosure; (iii)
becomes known to the Employee from a source other than Nucor, without a breach
of any agreement with Nucor and without any restriction on disclosure; (iv) is
required to be disclosed by judicial action, provided, however, that prompt
notice of said judicial action shall have been given to Nucor and that efforts
to avoid disclosure shall have been exhausted; or (v) is disclosed after written
approval for the disclosure has been given by Nucor.

     11.  Noncompetition.
          ---------------

     (a.) Employee hereby agrees that for the duration of Employee's employment
with Nucor, and for a period of twenty-four (24) months thereafter, Employee
will NOT, within the Restricted Territory, do any of the following:

          (1) Engage directly or indirectly (either as an owner, employee,
     consultant, or in any similar capacity) in the research, development,
     manufacture, marketing, sale, or distribution of steel or steel products
     which are the same as or similar to those in development, manufactured,
     and/or sold by Nucor on the date of Employee's termination.

          (2) Solicit or encourage any customers of Nucor (a) with whom Employee
     had direct contact during the last twelve (12) months of Employee's
     employment with Nucor, and (b) who remain Nucor customers at the time of
     solicitation, to purchase steel or steel products from any entity other
     than Nucor.

          (3) Encourage, induce, or attempt to induce any employees of Nucor (a)
     with whom Employee had direct contact during the last twelve (12) months of
     Employee's employment with Nucor, and (b) who remain employed by Nucor at
     the time of the attempted inducement, to end their employment relationship
     with Nucor.

     (b.) As used in this provision, "Restricted Territory" shall mean the
following:

          (1) The United States, Canada, and Mexico.

          (2) If the definition in subparagraph (b)(1) is found to be
     unreasonable with respect to subparagraph (a)(1), (a)(2), or (a)(3) of this
     Section 11, then with regard to such subparagraph, the term "Restricted
     Territory" shall mean the United States.
<PAGE>

          (3) If the definitions in subparagraphs (b)(1) and (b)(2) are found to
     be unreasonable with respect to subparagraph (a)(1), (a)(2), or (a)(3) of
     this Section 11, then with regard to such subparagraph, the term
     "Restricted Territory" shall mean each state in the United States in which
     Nucor has a manufacturing facility or plant on the date of the termination
     of Employee's employment with Nucor (at the time of entry into this
     Agreement, these states include North Carolina, South Carolina, Texas,
     Alabama, Arkansas, Nebraska, Utah, Indiana, and New York).

     (c.) Employee specifically agrees that the post-termination restrictions in
this Section 11 will apply to Employee regardless of whether termination of
employment is initiated by Nucor or Employee and regardless of the reason for
termination of Employee's employment.  Further, Employee acknowledges and agrees
that Nucor's payment of the compensation described in Section 4 is intended to
compensate Employee for the limitations on Employee's competitive activities
described in this Section 11 for the two-year period following Employee's
employment with Nucor regardless of the reason for termination.  Thus, for
example, in the event that Nucor terminates Employee's employment without cause,
Employee expressly agrees that the restrictions in this Section 11 will apply to
Employee notwithstanding the reasons or motivations of Nucor in terminating
Employee's employment.

     12.  Severability.  It is the intention of the parties to restrict the
          -------------
activities of Employee only to the extent reasonably necessary for the
protection of Nucor's legitimate interests.  The parties specifically covenant
and agree that should any of the provisions in this Agreement be deemed by a
court of competent jurisdiction too broad for the protection of Nucor's
legitimate interests, the parties authorize the court to narrow, limit or modify
the restrictions herein to the extent reasonably necessary to accomplish such
purpose.  In the event such limiting construction is impossible, such invalid or
unenforceable provision shall be deemed severed from this Agreement and every
other provision of this Agreement shall remain in full force and effect.

     13.  Assignment of Intellectual Property Rights.
          -------------------------------------------

     (a.) Employee hereby assigns to Nucor Employee's entire right, title and
interest, including copyrights and patents, in any idea, invention, design of a
useful article (whether the design is ornamental or otherwise), and any other
work of authorship (collectively the "Developments"), made or conceived during
Employee's employment by Nucor solely or jointly by Employee, or created wholly
or in part by Employee, whether or not such Developments are patentable,
copyrightable or susceptible to other forms of protection, where the
Developments:  (i) relate to Nucor's actual or anticipated business or research
or development, or (ii) are suggested by or result from any work performed by
Employee on Nucor's behalf.

     (b.) In connection with any of the Developments assigned in subparagraph
(a) above:  (i) Employee will promptly disclose them to Nucor's management; and
(ii) Employee will, on Nucor's request, promptly execute a specific assignment
of title to Nucor or its designee, and do anything else reasonably necessary to
enable Nucor or its designee to secure a patent, copyright, or other form of
protection therefore in the United States and in any other applicable country.
<PAGE>

     14.  Enforcement.  In addition to any other remedies available to Nucor,
          ------------
the provisions of this Agreement may be enforced by injunction to (a) restrain
any violation by Employee, Employee's partners, agents, servants, employers, and
employees, and all persons acting for or with Employee, and (b) to compel
specific performance of the terms and conditions of this Agreement.  Employee
represents and acknowledges that in the event of the termination of Employee's
employment for any reason, Employee's experience and capabilities are such that
Employee can obtain employment and that enforcement of this Agreement by way of
injunction will not prevent Employee from earning a livelihood.

     15.  Reasonableness of Restrictions.  Employee has carefully considered the
          ------------------------------
nature and extent of the restrictions upon him and the rights and remedies
conferred upon Nucor under Sections 4, 10, 11, 13, and 14 and hereby
acknowledges and agrees that the same are reasonable in time and territory, are
designed to eliminate competition which would otherwise be unfair to Nucor, do
not interfere with Employee's exercise of his inherent skill and experience, are
reasonably required to protect the legitimate interests of Nucor, and do not
confer a benefit upon Nucor disproportionate to the detriment to the Employee.
Employee certifies that he has had the opportunity to discuss this Agreement
with such legal advisors as he chooses and that he understands its provisions
and has entered into this Agreement freely and voluntarily.

     16.  Applicable Law.  This Agreement shall be interpreted, construed and
          --------------
governed according to the laws of the State of North Carolina, regardless of
choice of law principles to the contrary.  Further, Nucor and Employee agree
that in any dispute between them jurisdiction and venue are appropriate in
Mecklenburg County, North Carolina.

     17.  Employee to Return Property.  Employee agrees that upon (a) the
          ---------------------------
termination of Employee's employment with Nucor, whether by Employee or Nucor
for any reason (with or without cause), or (b) the written request of Nucor,
Employee (or in the event of the death or disability of Employee, Employee's
heirs, successors, assigns and legal representatives) shall return to Nucor any
and all property of Nucor, including but not limited to all Confidential
Information, notes, data, tapes, computers, lists, reference items, phones,
documents, sketches, drawings, software, product samples, rolodex cards, forms,
manuals, and equipment, without retaining any copies or summaries of such
property.

     18.  Entire Agreement; Amendments.  This Agreement discharges and cancels
          ----------------------------
all previous agreements and constitutes the entire agreement between the parties
with regard to the subject matter hereof.  No agreements, representations, or
statements of any party not contained herein shall be binding on either party.
Further, no amendment or variation of the terms or conditions of this Agreement
shall be valid unless in writing and signed by both parties.

     19.  Assignability.  This Agreement and the rights and duties created
          -------------
hereunder shall not be assignable or delegable by Employee.  Nucor may, at its
option and without consent of Employee, assign its rights and duties hereunder
to any successor entity or transferee of Nucor's assets.

     20.  Binding Effect.  This Agreement shall be binding upon and inure to the
          --------------
benefit of Nucor and Employee and their respective successors, assigns, heirs
and legal representatives.
<PAGE>

     21.  No Waiver.  No failure or delay by any party to this Agreement to
          ---------
enforce any right specified in this Agreement will operate as a waiver of such
right, nor will any single or partial exercise of a right preclude any further
or later enforcement of the right within the period of the applicable statute of
limitations.

     IN WITNESS WHEREOF, the parties have executed this Agreement on the dates
specified below.

                              TERRY S. LISENBY

                              /s/ Terry S. Lisenby
                              ----------------------
                              Terry S. Lisenby

                              Date:     April 10, 2001
                                    ------------------

                              NUCOR CORPORATION

                              By:   /s/ Daniel R. DiMicco
                                  -----------------------

                              Its:    President
                                   ------------

                              Date:     April 10, 2001
                                    ------------------

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