SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                Current Report Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934


        Date of Report (Date of earliest event reported) August 18, 1997




                       PUBLIC STORAGE PROPERTIES XI, INC.
                       ----------------------------------
             (Exact name of registrant as specified in its charter)




     California                           1-10709               95-4300881
- ---------------------------      ------------------------  ---------------------
     (state or other             (Commission File Number)    I.R.S. Employer 
jurisdiction of incorporation                             Identification Number)




                701 Western Ave., Glendale, California 91201-2397
                -------------------------------------------------
               (Address of principal executive offices) (Zip Code)



       Registrant's telephone number, including area code: (818) 244-8080
                                                           --------------


                                       N/A
                                       ---
          (Former name or former address, if changed since last report)


Item 5.  OTHER EVENTS

         a.   Proposed Merger and Exchange

         Public Storage  Properties  XI, Inc.  ("PSP11"),  American  Office Park
Properties,  Inc. ("AOPP") and Public Storage, Inc. ("PSI") have entered into an
Agreement and Plan of Reorganization dated as of August 18, 1997 (the "Agreement
and Plan of Reorganization")  providing for (i) the merger of AOPP with and into
PSP11  (the  "Merger")  and  (ii)  the  tax-deferred   like-kind  exchange  (the
"Exchange")  in  which  PSP11  will  exchange  13  predominately  mini-warehouse
properties for 11 commercial  properties owned by PSI, which Merger and Exchange
are subject to certain  conditions (as described  below).  AOPP, a subsidiary of
PSI, owns and operates commercial properties directly and through a consolidated
partnership  (the  "Operating  Partnership").  Upon  the  Merger,  each  of  the
1,819,937  outstanding  shares of  PSP11's  Common  Stock  Series A  ("Series  A
Shares") (other than shares held by holders of Series A Shares of PSP11 ("Series
A Shareholders") who have properly exercised dissenters' rights under California
law) would continue to be owned by the Series A  Shareholders  or converted into
the right to  receive  cash as  follows:  (i) with  respect  to up to 20% of the
outstanding  Series  A  Shares,  $20.50  in cash and  (ii)  the  balance  of the
outstanding  Series  A  Shares  would  continue  to be  owned  by the  Series  A
Shareholders.  In the Merger,  (i) each share of PSP11's  Common  Stock Series B
("Series B Shares")  and each share of PSP11's  Common Stock Series C ("Series C
Shares")  would be converted  into 0.8641 Series A Shares of PSP11 (or up to 20%
in cash) and (ii) each share of AOPP's capital stock will be converted into 1.18
Series A Shares of PSP11 (or up to 20% in cash).  There are 707,071  outstanding
Series B Shares  and Series C Shares and  3,523,500  outstanding  shares of AOPP
Common Stock.  Approximately  4,727,000 Series A Shares of PSP11 would be issued
in the Merger  (assuming no cash elections) with an additional  7,192,000 shares
reserved for issuance upon conversion of partnership  interests of the Operating
Partnership  into Series A Shares of PSP11.  After the Merger,  the ownership of
PSP11  by  public  shareholders  will  be  reduced  from  63% to 26%  while  the
beneficial  ownership of PSP11 by PSI will increase from 37% to 74% (assuming no
cash elections and no conversion of partnership  interests).  Concurrently  with
the Merger, PSP11 will exchange 13 predominately  mini-warehouse  properties for
11  commercial  properties  owned  by  PSI.  The  Merger  and the  Exchange  are
conditioned  on each other.  The Merger is  conditioned  on (among other things)
approval by PSP11's shareholders and receipt of a satisfactory  fairness opinion
by PSP11 and the Exchange is  conditioned  on (among other  things)  approval by
PSI's Board of Directors.

         For further information regarding the Merger and the Exchange,  see the
Agreement and Plan of  Reorganization  which is filed as Exhibit 2 hereto and is
incorporated herein by this reference.


         b.   Summary Financial Information
              -----------------------------



                                                  Six Months Ended June 30, 1997              Year Ended December 31, 1996
                                             ------------------------------------------    ----------------------------------------
                                                          Pro Forma -      Pro Forma -                 Pro Forma -     Pro Forma -
                                               PSP11        No Cash       Maximum Cash      PSP11       No Cash       Maximum Cash
                                             Historical   Elections(1)   Elections(1)(2)   Historical  Elections(1) Elections(1)(2)
                                             ----------- --------------  ----------------  ----------  ------------ ---------------
                                                                         ($ in thousands,except per share data)
OPERATING DATA:
Revenues
                                                                                                           
   Rental revenues                           $  3,704    $   21,619      $   21,619       $  7,220    $   40,753      $   40,753
   Facility management fees                         -           198             198              -           375             375
   Interest and other income                       32           171             171             33            76              76
                                             ----------- --------------  ----------------  ----------  ------------ ---------------
                                                3,736        21,988          21,988          7,253        41,204          41,204
                                             ----------- --------------  ----------------  ----------  ------------ ---------------
Expenses:
   Cost of operations                           1,385         8,245           8,245          2,728        16,946          16,946
   Cost of managing facilitates                     -            41              41              -            91              91
   Depreciation and amortization                  569         4,455           4,455          1,150         8,909           8,909
   General and administrative                     107           492             492            217           953             953
   Interest expense                                 -             -               -              3             3               3
                                             ----------- --------------  ----------------  ----------  ------------ ---------------
                                                2,061        13,233          13,233          4,098        26,902          26,902
                                             ----------- --------------  ----------------  ----------  ------------ ---------------
Income before minority interest                 1,675         8,755           8,755          3,155        14,302          14,302
Minority interest(3)                                -        (4,583)         (4,707)             -        (7,486)         (7,690)
                                             ----------- --------------  ----------------  ----------  ------------ ---------------
Net income                                   $  1,675    $    4,172       $   4,048       $  3,155    $    6,816      $    6,612
                                             =========== ==============  ================  ==========  ============ ===============

BALANCE SHEET DATA(AT END OF PERIOD):
   Cash and cash equivalents                 $  1,861    $   11,880      $    4,418  
   Total assets                                28,370       272,577         265,115  
   Total debt                                       -             -               -  
   Shareholders' equity                        26,930       118,872         111,410  

PER SHARE OF COMMON STOCK
Net income(4):
   Primary                                   $    0.85   $      0.64     $      0.65      $    1.59   $      1.04     $      1.07
   Fully-diluted                                  0.66          0.64            0.65           1.24          1.04            1.07
   Book value (at end of period)                 10.66         18.16           18.02  
Weighted average shares of
   common stock (in thousands)(5)
   Primary                                      1,820         6,547           6,183          1,831         6,547           6,183
   Fully-diluted                                2,527         6,547           6,183          2,538         6,547           6,183

PROPERTY DATA:
   Business parks:
     Net rentable square feet at end of
       period (000's)                             191         4,594           4,594            191         4,594           4,594
     Number of facilities with business
       park space at end of period                  4            54              54              4            54              54
     Weighted average occupancy for the          96.8%         95.8%           95.8%          97.9%         95.9%           95.9%
       period
     Weighted average monthly realized
       rent per occupied square feet for      $   0.63    $     0.76      $     0.76       $   0.60    $     0.73      $     0.73
       the period


   Mini-warehouses:
     Net rentable square feet at end of
       period (000's)                             738             -               -            738           -               -
     Number of facilities with
       mini-warehouse space at end of              13             -               -             13           -               -
       period
     Weighted average occupancy for the          92.1%            -               -  
       period                                                                                 92.1%          -               -
     Weighted average monthly realized
       rent per occupied square feet for      $   0.74            -               -        $   0.72          -               -
       the period

OTHER DATA:
   Funds from operation (6)                   $ 2,244     $   6,295       $   6,107        $ 4,305     $  11,061       $  10,730


(1)  For the pro forma data,  assumes all property  transactions  which occurred
     during  1997 and  concurrent  with the Merger  are  assumed to occur at the
     beginning of 1996.  Pro forma per share  amounts are based on the number of
     shares of PSP11 Common Stock Series A assumed to be outstanding at June 30,
     1997,  after giving  effect to the issuance of shares of PSP11 Common Stock
     Series A in the Merger. The per share information  assumes the cancellation
     of  47,824  PSP 11  Common  Stock  Series C  shares  in  accordance  with a
     pre-existing  agreement,  the conversion of each  remaining  share of PSP11
     Common  Stock  Series B and C into  0.8641  share of PSP11  Common and 1.18
     shares of PSP11  Common  Stock  Series A are  issued for each share of AOPP
     Common Stock in the Merger.

(2)  Maximum  cash  elections  assumes  20% of the  outstanding  shares of PSP11
     Common Stock Series A elect to take $20.50 in cash in  connection  with the
     Merger.

(3)  As a result of the  Merger,  PSP11 will  replace  AOPP as the sole  general
     partner  of  the  Operating  Partnership.   Minority  interests  represents
     ownership of Operating  Partnership Units which are not owned by PSP11. The
     Operating Partnership Units, subject to certain conditions of the Operating
     Partnership  Agreement,  are convertible  into shares of PSP11 Common Stock
     Series A on a  one-for-one  basis.  Pro forma  weighted  average  Operating
     Partnership  Units  outstanding  during each pro forma  period and owned by
     minority interest totaled 7,192,230.

(4)  Primary  earnings  per  share  represents  the   shareholders'   rights  to
     distribution out of the respective period's net income, which is calculated
     by dividing net income after  reduction for any  distributions  made to the
     holders of the PSP11  Common  Stock  Series B (holders of the PSP11  Common
     Stock  Series C are not  entitled to cash  distributions)  by the  weighted
     average number of shares of PSP11 Common Stock.  Fully diluted earnings per
     shares  assumes  conversion  of the PSP11  Common Stock Series B and C into
     PSP11  Common  Stock  Series A. In  connection  with the Merger,  the PSP11
     Common  Stock  Series B and C converted  into PSP11 Common Stock Series A -
     see note (1).

(5)  In  connection  with the  reorganization  of a  partnership  which  was the
     predecessor  to PSP11,  PSP11  issued PSP11 Common Stock Series A and PSP11
     Common Stock Series B and C. The capital structure of PSP11 was designed to
     reflect the economic rights of the limited partners and general partners in
     the predecessor  partnership and the capital shares were distributed to the
     limited  and  general  partners  in  respect  of  their  interests  in  the
     predecessor partnership.

     PSP11Common   Stock   Series  A  shares  are   entitled  to  100%  of  cash
     distributions  from  operations  from  PSP11  until  (a) the sum of (1) all
     cumulative  dividends  and  other  distributions  from all  sources  to the
     holders  of  PSP11  Common  Stock  Series A  shares  of  PSP11  and (2) the
     cumulative  predecessor  partnership  distributions  from all sources  with
     respect to all units equal (b) the product of $20  multiplied by the number
     of  the   then-outstanding   shares  of  PSP11   Common   Stock   Series  A
     ("Conversion").

     As of June 30,  1997,  Conversion  will  occur  with  respect to PSP11 when
     $6,016,000 in additional  distributions are made to holders of PSP11 Common
     Stock  Series A (assuming  no further  repurchases  of PSP11  Common  Stock
     Series A).

(6)  Funds from  operation  is  defined by PSP11 and AOPP as net income  (loss),
     computed in  accordance  with  generally  accepted  accounting  principles,
     before   depreciation,   amortization  of  goodwill  and  extraordinary  or
     non-recurring  items.  FFO is  presented  because  PSP11,  as  well as many
     industry  analysts,  consider FFO to be one measure of the  performance  of
     REITs i.e., one that generally  reflects  changes is net operating  income.
     FFO does not take into consideration  scheduled  principal payments on debt
     and capital improvements.  Accordingly, FFO is not necessarily a substitute
     for cash flow or net income as a measure liquidity or operating performance
     or ability to pay distributions.


Item 7.  FINANCIAL STATEMENTS AND EXHIBITS

         c.   Exhibits
              --------

         2. Agreement and Plan of  Reorganization  by and among PSP11,  AOPP and
PSI dated as of August 18, 1997 (the  "Agreement  and Plan of  Reorganization"),
and form of  Agreement  of  Merger  between  PSP11  and AOPP  (Exhibit  A to the
Agreement and Plan of Reorganization) are filed herewith;  the other exhibits to
the Agreement and Plan of Reorganization have been omitted and will be furnished
to the Securities and Exchange Commission upon request.

                                   SIGNATURES

Pursuant to the  requirements  of the  Securities  and Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.



                                 PUBLIC STORAGE PROPERTIES XI, INC.



Date:  September 3, 1997         By: /s/ David P. Singelyn
                                     ---------------------
                                     David P. Singelyn
                                     Vice President and Chief Financial Officer