##### 



Exhibit 12.2
 Brandywine Operating Partnership, L.P.
Computation of Ratio of Earnings to Combined Fixed Charges
(in thousands)
 For the nine-months ended September 30,
    
    
    For the years ended December 31,2007
    
    
    2006
    
    
    2006
    
    
    2005
    
    
    2004
    
    
    2003
    
    
    2002Earnings before fixed charges:Add:Income (loss) from continuing operations
    
    $
    (4,662
    )
    
    $
    (27,482
    )
    
    $
    (19,451
    )
    
    $
    34,148
    
    
    $
    52,419
    
    
    $
    74,882
    
    
    $
    45,352Minority
interest  partners share of consolidated real estate ventures
    
    
    103
    
    
    
    (560
    )
    
    
    (270
    )
    
    
    154
    
    
    
    (206
    )
    
    
    
    
    
    
    Fixed charges  per below
    
    
    142,962
    
    
    
    140,478
    
    
    
    191,614
    
    
    
    86,191
    
    
    
    60,611
    
    
    
    62,407
    
    
    
    69,881Less:Capitalized interest
    
    
    (12,757
    )
    
    
    (7,210
    )
    
    
    (9,537
    )
    
    
    (9,603
    )
    
    
    (3,030
    )
    
    
    (1,503
    )
    
    
    (2,949
    )Earnings before fixed charges
    
    $
    125,646
    
    
    $
    105,226
    
    
    $
    162,356
    
    
    $
    110,890
    
    
    $
    109,794
    
    
    $
    135,786
    
    
    $
    112,284Fixed charges:Interest expense (including amortization)
    
    $
    125,410
    
    
    $
    128,540
    
    
    $
    175,784
    
    
    $
    73,918
    
    
    $
    54,610
    
    
    $
    57,835
    
    
    $
    63,522Capitalized interest
    
    
    12,757
    
    
    
    7,210
    
    
    
    9,537
    
    
    
    9,603
    
    
    
    3,030
    
    
    
    1,503
    
    
    
    2,949Proportionate share of interest for unconsolidated real estate ventures
    
    
    4,795
    
    
    
    4,728
    
    
    
    6,293
    
    
    
    2,670
    
    
    
    2,971
    
    
    
    3,069
    
    
    
    3,410Total Fixed Charges
    
    
    142,962
    
    
    
    140,478
    
    
    
    191,614
    
    
    
    86,191
    
    
    
    60,611
    
    
    
    62,407
    
    
    
    69,881Ratio of earnings to combined fixed charges
    
    
    (b
    )
    
    
    (b
    )
    
    
    (b
    )
    
    
    1.29
    
    
    
    1.81
    
    
    
    2.18
    
    
    
    1.61
 
 (a)
    
    Amounts for the nine-months ended September 30, 2007 and 2006 and for the years ended
December 31, 2006, 2005, 2004, 2003 and 2002 have been reclassified to present properties sold
consistent with the presentation for the period ended September 30, 2007. As a result, operations
have been reclassified to discontinued operations from continuing operations for all periods
presented.(b)
    
    Due to the registrants loss in the period, the coverage ratio was less than 1:1. The
registrant must generate additional earnings of $17,316 and $35,252 for the nine-months ended
September 30, 2007 and 2006, respectively and $29,258 for the year ended December 31, 2006 to
achieve a coverage ratio of 1:1.