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                                                                   EXHIBIT 10.40


                              STEEL DYNAMICS, INC.

                     NON-EMPLOYEE DIRECTOR STOCK OPTION PLAN

       1.     PURPOSE. This Non-Qualified Stock Option Plan, to be known as the
Steel Dynamics, Inc. Non-Employee Director Stock Option Plan (the "Plan") is
intended to promote the interests of Steel Dynamics, Inc. (the "Company") by
providing an inducement to attract and retain the services of qualified persons
who are not employees or officers of the Company to serve as members of its
Board of Directors (the "Board") and by strengthening the mutuality of interests
between such directors and the Company's Stockholders.

       2.     AVAILABLE SHARES. The total number of shares of the Company's $.01
per share par value Common Stock (the "Common Stock") for which options may be
granted under this Plan shall not exceed 100,000 shares, subject to adjustment
in accordance with Section 10 of this Plan. Shares subject to this Plan may be
authorized but unissued shares or shares that were once issued and subsequently
reacquired by the Company. If any options granted under the Plan shall expire,
terminate or be canceled for any reason without having been exercised in full,
the number of unpurchased shares shall again become available for purposes of
the Plan.

       3.     ADMINISTRATION. This Plan shall be administered by the Board or by
a committee appointed by the Board (the "Committee"). In the event the Board
fails to appoint or refrains from appointing a Committee, the Board shall have
all power and authority to administer this Plan. In such event, the word
"Committee," wherever used herein, shall be deemed to mean the Board. Subject to
the provisions of the Plan, the Committee shall have the power to construe this
Plan, to determine all questions hereunder, to accelerate the vesting or
exercise of an option, and to adopt and amend such rules and regulations for the
administration of this Plan as it may deem desirable. The Committee may also
correct any defect, supply any omission, amend or conform the Plan to any change
in law or regulation, or reconcile any inconsistency or ambiguity in the Plan or
in any option in such manner and to the extent it shall deem necessary to carry
the Plan into effect as intended. No member of the Board or the Committee shall
be liable for any action or determination made in good faith with respect to
this Plan or any option granted under it. Any decision, interpretation or other
action made or taken in good faith by the Committee in accordance with this Plan
shall be final, binding and conclusive on the Company, all members of the Board
and Committee, if any, all optionees, and their respective heirs, executors,
administrators, successors and assigns.

       4.     AUTOMATIC GRANT OF OPTIONS. Subject to the availability of shares
under this Plan: (a) each person who is a member of the Board on the day
following the Company's 2000 Annual Meeting of Stockholders and who is not an
employee or officer of the Company (a "Non-Employee Director") and each person
who is a Non-Employee Director on November 15, 2000 (each an "Initial Grant
Date") shall be automatically granted an option to purchase Common Stock of the
Company on each such Initial Grant Date equal to the number of whole shares,
rounded up from .50 or down from .49, calculated by dividing a grant value of
$15,000 on each of the Initial Grant Dates by the fair market value of the
Company's Common Stock on each such date, and (b) each person who is a
Non-Employee Director on May 15 and on November 15 (each a "Grant Date") in each
year beginning on January 1, 2001 during the term of this Plan shall be
automatically granted on each such date a like option to purchase Common Stock
of the Company equal to the number of whole shares, rounded up or down as
previously described, calculated by dividing a grant value of $15,000, or such
other amount, whether higher or lower, as is specified from time to time for
"Grade 3 Supervisors/Professionals" under the Company's 1996 Incentive Stock
Option Plan (or, in lieu thereof, as may be specified from time to time by the
Committee), by the fair market value of the Company's Common Stock on each such
Grant Date. The number of shares covered by options granted under this Section 4
shall be subject to adjustment in accordance with the provisions of Section 10
of this Plan.



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       5.     OPTION PRICE. The purchase price of the stock covered by options
granted pursuant to this Plan shall be 100% of the fair market value of such
shares on the day the option is granted. The option price will be subject to
adjustment in accordance with the provisions of Section 10 of this Plan. For
purposes of this Plan, "fair market value" shall be determined as of the last
trading day for which the prices or quotes for the Company's publicly traded
stock are available prior to the date such option is granted and shall mean (i)
the last reported sale price (on that
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date) of the Company's Common Stock on the Nasdaq National Market, if the Common
Stock is traded on that market; or (ii) the average (on that date) of the high
and low prices of the Company's Common Stock on the principal national
securities exchange on which the Common Stock is traded if it is in fact traded
on such an exchange; or (iii) the closing bid price (or average of bid prices)
last quoted (on that date) by an established quotation service for
over-the-counter securities, if the Company's Common Stock is not reported on
the Nasdaq National Market List.

       6.     PERIOD OF OPTION. Unless sooner terminated in accordance with the
provisions of Section 8 of this Plan, an option granted hereunder shall expire
on the date which is five (5) years after the date of grant of the option.

       7.     VESTING OF SHARES AND NON-TRANSFERABILITY OF OPTIONS.

              (a) VESTING. Options granted under this Plan shall not be
       exercisable until they become vested. Options granted under this Plan
       shall become fully vested in the optionee and thus become exercisable six
       (6) months after the date of grant.

              (b) NON-TRANSFERABILITY. Any option granted pursuant to this Plan
       shall not be assignable or transferable other than by will or the laws of
       descent and distribution, pursuant to a valid domestic relations order,
       or otherwise in accordance with the terms of the optionee's stock option
       agreement, and shall be exercisable during the optionee's lifetime only
       by him or her and then only in accordance with the provisions of the
       Securities Act of 1933 and the rules promulgated thereunder.

       8.     TERMINATION OF OPTION RIGHTS.

              (a) If an optionee ceases to be a director of the Company, for
       whatever reason, no further grants of options shall be made to that
       optionee pursuant to this Plan.

              (b) Subject to the provisions of Section 8(d) and except as may
       otherwise be specified in the option agreement, in the event that an
       optionee ceases to be a director for any reason other than death, any
       portion of an option which is then vested but has not been exercised at
       the time the optionee so ceases to be a director may be exercised by the
       optionee, to the extent it is then vested, at any time prior to the
       scheduled expiration date of the option.

              (c) Except as may be otherwise specified in the option agreement,
       in the event that an optionee ceases to be a director by reason of his or
       her death, any unexercised options shall be exercisable by the optionee's
       personal representative, heir or legatee at any time prior to the
       scheduled expiration date of the option.

              (d) Except as may be otherwise specified in the option agreement,
       no portion of an option may be exercised if the optionee is removed from
       the Board for any of the following reasons: (i) disloyalty, gross
       negligence, dishonesty or breach of fiduciary duty to the Company; (ii)
       the commission of an act of embezzlement, fraud or deliberate disregard
       of the rules or policies of the Company; or (iii) the unauthorized
       disclosure or misappropriation of any trade secret or confidential
       information of the Company.


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       9.     EXERCISE OF OPTION.

              (a) Subject to the terms and conditions of this Plan and the
       option agreements, an option granted hereunder, to the extent then
       exercisable, shall be exercisable only for the full number of shares
       covered by that option, by giving written notice to the Company by mail
       or in person, at its principal executive offices, accompanied by payment
       in full for such shares in cash or by check in United States dollars.

              (b) Subject to the applicable requirements of the Securities and
       Exchange Commission, Regulation T, the Internal Revenue Code, and other
       federal, state and local tax and securities laws, and notwithstanding the
       requirements for cash payment set forth in Section 9(a) of this Plan, the
       Committee shall have the authority to determine any other methods, if
       any, by which the exercise price of an option may be paid by the
       optionee, including the form of payment and the methods by which shares
       of the Company's stock may be delivered or deemed to be delivered to the
       optionee. Likewise, the Committee, in the exercise of its discretion, may
       also allow an optionee to pay the exercise price of an option by
       delivering previously issued shares of the Company's Common Stock or by
       directing the Company to withhold from the shares of Common Stock that
       would otherwise be issued upon exercise of the option that number of
       shares having an fair market value on the exercise date equal to the
       exercise price, all as determined pursuant to rules and procedures
       established from time to time by the Committee.

              (c) An optionee shall not exercise an option at any one time as to
       fewer than five hundred (500) shares, or all of the remaining shares then
       purchasable by the person or persons exercising the option, if fewer than
       five hundred (500) shares.

              (d) The holder of an option shall not have any rights of a
       stockholder with respect to the shares covered by the option, except to
       the extent that shares shall have been actually issued and transferred to
       him or her upon the exercise of the option.

       10.    ADJUSTMENTS UPON CHANGES IN CAPITALIZATION AND OTHER EVENTS. Upon
the occurrence of any of the following events, an optionee's rights with respect
to options granted to him or her hereunder shall be adjusted as hereinafter
provided:

              (a) STOCK DIVIDENDS AND STOCK SPLITS. If the shares of Common
       Stock shall be subdivided or combined into a greater or smaller number of
       shares or if the Company shall issue any shares of Common Stock as a
       stock dividend on its outstanding Common Stock, the number of shares of
       Common Stock deliverable upon the exercise of options shall be
       appropriately increased or decreased proportionately, and appropriate
       adjustments shall be made in the purchase price per share to reflect such
       subdivision, combination or stock dividend.

              (b) OTHER ADJUSTMENTS. In the event of a reorganization,
       recapitalization, merger, consolidation, or any other change in the
       corporate structure or shares of the Company, to the extent permitted by
       Rule 16b-3 under the Securities Exchange Act of 1934, there shall be an
       automatic adjustment in the number and kind of shares authorized by this
       Plan and in the option price of outstanding options under this Plan in
       such manner as will be necessary to maintain the proportionate interest
       of the optionee and to preserve, without exceeding, the value of such
       option.

              (c) OTHER ADJUSTMENTS. Upon the happening of any of the foregoing
       events, the class and aggregate number of shares set forth in Sections 2
       and 4 of this Plan that are subject to options shall also be
       appropriately adjusted to reflect such events, including the conversion
       of the underlying shares into another class of securities, into
       securities of another person, into cash or into other property. The Board
       shall determine the specific adjustments to be made under this Section 10
       and its determination shall be conclusive.



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       11.    RESTRICTIONS ON ISSUANCE OF SHARES. Notwithstanding the provisions
of Sections 4 and 9 of this Plan, the Company shall have no obligation to
deliver any certificate or certificates or to cause the electronic transfer of
shares upon exercise of an option until one of the following conditions shall be
satisfied:

              (i) The issuance of the underlying shares with respect to which
       the option has been exercised is at the time of the issuance of such
       shares effectively registered under applicable federal and state
       securities laws as now in force or hereafter amended; or

              (ii) Counsel for the Company shall have rendered an opinion that
       the issuance of such shares is exempt from registration under applicable
       federal and state securities laws as now in force or hereafter amended;
       and the Company has complied with all applicable laws and regulations
       with respect thereto, including without limitation, all regulations
       required by the Nasdaq National Market or by any stock exchange upon
       which the Company's outstanding Common Stock is then listed.

       12.    LEGEND ON CERTIFICATES. The certificates representing shares
issued pursuant to the exercise of an option granted hereunder may, if
restricted, carry such appropriate legend, or appropriate restrictions may be
noted electronically, as may be deemed necessary or advisable by counsel to the
Company in order to comply with the requirements of the Securities Act of 1933
or any state securities laws.

       13.    OPTION AGREEMENT. Each option granted under the provisions of this
Plan shall be evidenced by an option agreement, which agreement shall be duly
executed and delivered on behalf of the Company and by the optionee to whom such
option is granted. The option agreement shall contain such terms, provisions and
conditions not inconsistent with this Plan as may be determined by the Committee
or by its designee executing such option.

       14.    TERMINATION AND AMENDMENT OF PLAN. Options may no longer be
granted under this Plan after January 1, 2010, and this Plan shall terminate
when all options granted or to be granted hereunder are no longer outstanding.
The Board may at any time terminate this Plan or make such modification or
amendment thereof as it deems advisable. Subject to the provisions of Section
10, termination or any modification or amendment of this Plan shall not, without
consent of a participant, affect his or her rights under any option already
granted to him or her.

       15.    WITHHOLDING OF INCOME TAXES. Upon the exercise of an option, the
Company, in accordance with Section 3402(a) of the Internal Revenue Code, may
require the optionee to pay withholding taxes in respect of amounts considered
to be compensation includible in the optionee's gross income.

       16.    COMPLIANCE WITH REGULATIONS. It is the Company's intent that the
Plan comply in all respects with Rule 16b-3 under the Securities Exchange Act of
1934 (or any successor or amended provision thereof) and any applicable
Securities and Exchange Commission interpretations thereof. If any provision of
this Plan is deemed not to be in compliance with Rule 16b-3, the provision shall
be null and void and may be modified and corrected by the Committee without the
necessity of securing further stockholder approval.

       17.    NONQUALIFIED OPTIONS. All options granted under this Plan shall be
nonqualified stock options (i.e., options that do not qualify as "incentive
stock options" under Section 422 of the Internal Revenue Code).

       18.    NO RIGHT TO CONTINUE RELATIONSHIP. Neither the Plan nor the grant
of an option under the Plan shall confer upon any person any right to continue
as a director of the Company or to obligate the Company to nominate any director
for reelection by the Company's stockholders.

       19.    COSTS. The Company shall bear all expenses incurred in
administering



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the Plan, including the expenses of issuing Common Stock upon the exercise of
options and of registering the same.

       20.    SEVERABILITY. If any part of this Plan shall be determined to be
invalid or void in any respect, such determination shall not affect, impair,
invalidate or nullify the remaining provisions of this Plan, which shall
continue in full force and effect and may be adjusted, in the Committee's
discretion, so as to most closely approximate the original intent expressed
herein.

       21.    GOVERNING LAW. The validity and construction of this Plan and the
instruments evidencing options shall be governed by the laws of the State of
Indiana, without giving effect to the principles of conflicts of law thereof.

       22.    EFFECTIVE DATE. This Plan shall be effective as of the 1st day of
January, 2000, subject, however, to stockholder approval at the Company's annual
meeting of stockholders on May 18, 2000, or any adjournment thereof, or pursuant
to any special meeting of stockholders held thereafter but prior to December 31,
2000. In the event that such approval is not obtained, all option grants made
hereunder shall be deemed null and void and the Plan shall be deemed terminated
on the earlier to occur of stockholder nonapproval, if any, or December 31,
2000.



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