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  Quarterly  Report  on  Form  10-Q of  Public  Storage
Properties IV, Ltd. (the "Partnership") for the quarterly period ended March 31,
2003 as filed with the  Securities  and Exchange  Commission  on the date hereof
(the  "Report"),  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/  Ronald L. Havner, Jr.
------------------------------------
Name:    Ronald L. Havner, Jr.
Title:   Chief Executive Officer of Public Storage, Inc.,
         Corporate General Partner
Date:    May 15, 2003

/s/  John Reyes
------------------------------------
Name:    John Reyes
Title:   Chief Financial Officer of Public Storage, Inc.,
         Corporate General Partner
Date:    May 15, 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.