EXHIBIT 99.1

                                  CERTIFICATION
                          Accompanying Form 10-Q Report
                            of First Industrial, L.P.
            Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
              (Chapter 63, Title 18 U.S.C. Section 1350(a) and (b))

      Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Chapter 63,
Title 18 U.S.C. Section 1350(a) and (b)), each of the undersigned hereby
certifies, to his knowledge, that the Quarterly Report on Form 10-Q for the
period ended March 31, 2003 of First Industrial, L.P. (the "Company") fully
complies with the requirements of Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934 and that the information contained in such
Report fairly presents, in all material respects, the financial condition and
results of operations of the Company.


Dated: May 14, 2003                     /s/ Michael W. Brennan
                                        ----------------------
                                        Michael W. Brennan
                                        Chief Executive Officer


Dated: May 14, 2003                     /s/ Michael J. Havala
                                        ---------------------
                                        Michael J. Havala
                                        Chief  Financial Officer

A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE COMPANY AND WILL BE RETAINED BY THE COMPANY AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.