Exhibit 99.1


                    CERTIFICATION OF CEO AND CFO PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Year-end Report on Form 10-K of Public Storage Properties
IV, Ltd. (the  "Partnership") for the year-end period ended December 31, 2002 as
filed with the  Securities  and  Exchange  Commission  on the date  hereof  (the
"Report"),  B. Wayne Hughes, as Chief Executive Officer of Public Storage,  Inc.
(through November 7, 2002), Ronald L. Havner, Jr., as Chief Executive Officer of
Public  Storage,  Inc.,  and John Reyes,  as Chief  Financial  Officer of Public
Storage, Inc., each hereby certifies,  pursuant to 18 U.S.C.ss.1350,  as adopted
pursuant toss.906 of the Sarbanes-Oxley Act of 2002, that:

         (1) The Report fully complies with the requirements of Section 13(a) of
the Securities Exchange Act of 1934; and

         (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Partnership.

/s/  B. Wayne Hughes
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Name:    B. Wayne Hughes
Title:   Chief Executive Officer of Public Storage, Inc.
         (through November 7, 2002), Corporate General Partner and
         Individual General Partner
Date:    March 28, 2003

/s/  Ronald L. Havner, Jr.
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Name:    Ronald L. Havner, Jr.
Title:   Chief Executive Officer of Public Storage, Inc.,
         Corporate General Partner
Date:    March 28, 2003

/s/  John Reyes
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Name:    John Reyes
Title:   Chief Financial Officer of Public Storage, Inc.,
         Corporate General Partner
Date:    March 28, 2003


This certification accompanies the Report pursuant to ss. 906 of the
Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the
Sarbanes-Oxley Act of 2002, be deemed filed by the Partnership for purposes of
ss.18 of the Securities Exchange Act of 1934, as amended.