RULE NO. 424(b)(2)
                                                      REGISTRATION NO. 333-09607


          PROSPECTUS SUPPLEMENT  (TO PROSPECTUS DATED AUGUST 5, 1996)

                                  MASTEC, INC.

                                  Common Stock

          This Prospectus Supplement is being furnished to Harrison-Wright
Company, Incorporated, a North Carolina corporation ("Harrison-Wright"), and to
the holders of the common stock, $1.00 par value (the "Harrison-Wright Common
Stock") and the preferred stock, $50.00 par value of Harrison-Wright (the
"Harrison-Wright Preferred Stock") (the "Harrison-Wright Shareholders") in
connection with the Asset Purchase Agreement, which is now expected to be dated
on or about November 21, 1996 (the "Asset Purchase Agreement"), to be entered
into by and among Harrison-Wright and its wholly-owned subsidiary Utility
Precast, Inc., a North Carolina corporation ("UPI") (Harrison-Wright and UPI
sometimes individually referred to as a "Seller" and collectively referred to as
the "Sellers") and  H-W Acquisition I Co., Inc., a Delaware corporation ("H-W
I"), H-W Acquisition II Co., Inc., a Delaware corporation ("H-W II") and H-W
Acquisition III Co., Inc., a Delaware corporation ("H-W III,") (H-W I, H-W II
and H-W III sometimes individually referred to as a "Buyer" and collectively
referred to as the "Buyers").  Each of the Buyers is a newly-formed, indirect
wholly-owned subsidiary of MasTec, Inc., a Delaware corporation ("MasTec" or the
"Company").  A Prospectus Supplement dated November 7, 1996, the Prospectus
dated August 5, 1996 and copies of a draft dated November 5, 1996 of the Asset
Purchase Agreement were previously distributed to the Harrison-Wright
Shareholders.

    This Prospectus Supplement describes a proposed change in the terms of the
Asset Purchase Agreement.  See "Proposed Change in Terms of Transaction." In
addition, this Prospectus Supplement contains copies of the following documents
previously filed by the Company with the Securities and Exchange Commission (the
"Commission"): the Company's Report on Form 10-K for the fiscal year ended
December 31, 1995, the Company's Report on Form 8-K dated April 30, 1996,
Amendment No. 1 to the Company's Report on Form 8-K dated April 30, 1996, the
Company's Proxy Statement for its Annual Meeting of Stockholders held on June 3,
1996, the Company's Report on Form 10-Q for the quarter ended March 31, 1996,
the Company's Report on Form 10-Q for the quarter ended June 30, 1996 and the
Company's report on Form 10-Q for the quarter ended September 30, 1996.

 
        THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE 
            SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURI-
              TIES COMMISSION NOR HAS THE COMMISSION OR ANY STATE
               SECURITIES COMMISSION PASSED UPON THE ACCURACY OR
               ADEQUACY OF THIS PROSPECTUS.  ANY REPRESENTATION
                    TO THE CONTRARY IS A CRIMINAL OFFENSE.

          The date of this Prospectus Supplement is November 15, 1996.

 
                             AVAILABLE INFORMATION

          The Company is subject to the informational requirements of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and, in
accordance therewith, files reports, proxy statements and other information with
the Securities and Exchange Commission (the "Commission").  Such reports, proxy
statements and other information filed by the Company can be inspected and
copied at the public reference facilities maintained by the Commission at
Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549 and at the
following regional offices of the Commission: Seven World Trade Center, Suite
1300, New York, New York 10048; and Northwestern Atrium Center, 500 West Madison
Street, Suite 1400, Chicago, Illinois 60661.  Copies of such material can be
obtained at prescribed rates by writing to the Commission, Public Reference
Section, 450 Fifth Street, N.W., Washington, D.C. 20549.  The Common Stock is
listed on the Nasdaq National Market under the symbol "MASX."  Reports, proxy
and information statements and other information concerning the Company can also
be inspected at the Nasdaq National Market at 1735 17th Street, N.W.,
Washington, D.C. 20006.

          This Prospectus Supplement constitutes part of a Registration
Statement on Form S-4 (together with all amendments and exhibits thereto, the
"Registration Statement") and does not contain all of the information set forth
in the Registration Statement, certain parts of which have been omitted in
accordance with the rules and regulations of the Commission.  Pursuant to Rule
424(b) of the Securities Act of 1933, as amended, this Prospectus Supplement
will be filed with the Commission electronically via EDGAR.  For further
information with respect to the Company and the securities offered hereby,
reference is made to the Registration Statement, which includes the Prospectus
Supplement dated November 7, 1996, and to the exhibits and schedules thereto.
Statements made in this Prospectus Supplement as to the contents of any
contract, agreement or other document referred to are not necessarily complete.
With respect to each such contract, agreement or other document filed as an
exhibit to the Registration Statement, reference is made to the exhibit for a
more complete description of the matter involved, and such statement is
qualified in its entirety by such reference.

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                  PROPOSED CHANGE IN TERMS OF THE TRANSACTION

          The proposed Asset Purchase Agreement among the Buyers and the Sellers
now provides that the Sellers will sell all of the properties, assets and rights
that each Seller owns and that are used or are held or are intended for use in
the conduct or operation of the Sellers' businesses to Buyers, in exchange for
the assumption by the Buyers of certain of the Sellers' liabilities (the
"Assumed Liabilities") and $6,834,767.39 or, at the Buyers' option, the number
of shares of the common stock, $ .10 par value (the "Common Stock") of MasTec
equal to $6,834,767.39 divided by the closing sale price (the "Closing Price")
of the Common Stock on the Nasdaq National Market System for the trading day
immediately preceding the closing date of the transactions contemplated by the
Asset Purchase Agreement (the "Closing Date") on which trading of the Common
Stock occurred (the "Purchase Price Shares").

          The Buyers and the Sellers are now considering a change in the terms
of the transaction under which the Buyers would also be given the choice between
either assuming the Assumed Liabilities or delivering the number of shares of
Common Stock of MasTec equal to the amount of the Assumed Liabilities divided by
the Closing Price (the "Assumed Liability Shares").  Under this change, if the
Buyers choose to deliver Common Stock instead of assuming the Assumed
Liabilities, the Sellers would be responsible for satisfying the Assumed
Liabilities.  The Buyers and the Sellers are also considering a new provision
under which the Buyers would guarantee that if the Sellers decided to sell the
Assumed Liability Shares during the 15 days following the Closing Date, the
Sellers would receive sufficient cash to pay all Assumed Liabilities (not taking
into account any cash received from the sale of the Purchase Price Shares). If
the Sellers received excess cash, they would return this excess to the Buyers.

          There can be no assurance that the parties will reach agreement on
this issue, or that the Asset Purchase Agreement will not be modified in other
respects.

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                REPORTS FILED BY THE COMPANY WITH THE COMMISSION

        The Company's report on Form 10-Q for the quarter ended September 30, 
1996.*

        The Company's Report on Form 10-K for the fiscal year ended December 
31, 1995.*

        The Company's Report on Form 8-K dated April 30, 1996.*

        Amendment No. 1 to the Company's Report on Form 8-K dated April 30, 
1996.*

        The Company's Proxy Statement for its Annual Meeting of Stockholders 
held on June 3, 1996.*

        The Company's Report on Form 10-Q for the quarter ended March 31, 1996.*

        The Company's Report on Form 10-Q for the quarter ended June 30, 1996.*





*  Included in full in Propsectus Supplement but not included in this filing
pursuant to Rule 424(b) because previously filed with the Commission.

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NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS IN CONNECTION WITH
THE OFFERING MADE HEREBY, AND, IF GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE
COMPANY.  THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION
OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SHARES OF COMMON STOCK OFFERED
HEREBY OR AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY SUCH SHARES TO
ANY PERSON, OR THE SOLICITATION OF A PROXY FROM ANY PERSON, IN ANY JURISDICTION
IN WHICH SUCH OFFER, SOLICITATION OF AN OFFER OR PROXY SOLICITATION IS UNLAWFUL.
THE DELIVERY OF THIS PROSPECTUS AT ANY TIME DOES NOT IMPLY THAT THE INFORMATION
HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.



                               TABLE OF CONTENTS
 

                                                               Page
Available Information                                            2
Proposed Change in Terms of the Transaction                      3
Reports Filed by the Company with the Commission                 4
            
 
 

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