Exhibit 3.72

                          CERTIFICATE OF INCORPORATION
                                       OF
                          TXI RIVERSIDE CALIFORNIA INC.

                                    * * * * *

     1. The name of the corporation is TXI Riverside California Inc.

     2. The address of its registered office in the State of Delaware is
Corporation Trust Center, 1209 orange Street, in the City of Wilmington, County
of New Castle. The name of its registered agent at such address is The
Corporation Trust Company.

     3. The nature of the business or purposes to be conducted or promoted is
to engage in any lawful act or activity for which Corporations may be organized
under the General corporation Lay of Delaware.

     4. The total number of shares of stock which the corporation shall have
authority to issue is One Thousand (1,000); all of such shares shall be without
Per value.

     5. The board of directors is authorized to make, alter or repeal the bylaws
of the Corporation. Election of directors need not be by written ballot.

     6. The name and mailing address of the sole incorporator is:

               T. L. Ford
               Corporation Trust Center
               1209 Orange street
               Wilmington, Delaware 19801

     7. A director of the corporation shall not be personally liable to the
corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director except far liability (i) for any breach of the director's
duty of loyalty to the corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional, misconduct or a
knowing violation of law, (iii) under section 174 of the Delaware General
Corporation Law, or (iv) for any transaction from which the director derived any
improper personal benefit.

     8. The corporation shall indemnify its officers, directors, employees and
agents to the extent permitted by the General corporation Laws of Delaware

     I, THE UNDERSIGNED, being the incorporator hereinbefore named, for the
purpose of forming a corporation pursuant to the General Corporation Law of
the State of Delaware, do make this certificate, hereby declaring and certifying
that this is my act and deed and the facts herein stated are true, and
accordingly have hereunto set my hand this 22nd day of December, 1997.

                                                    /s/ T. L. Ford
                                                    ----------------------------
                                                    Sole Incorporator
                                                    T. L. Ford

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