Exhibit 32


                    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 June 30,
2007 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,  corporate general partner,  and John Reyes, as Chief Financial Officer
of Public Storage, corporate general partner, each hereby certifies, pursuant to
18 U.S.C.  ss.1350,  as adopted pursuant to ss.906 of the  Sarbanes-Oxley Act of
2002, that:

(1)      The Report fully  complies  with the  requirements  of Section 13(a) or
         15(d) 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
         Corporate General Partner
Date:    August 13, 2007

/s/  John Reyes
- -------------------------------------
Name:    John Reyes
Title:   Chief Financial Officer of Public Storage
         Corporate General Partner
Date:    August 13, 2007