POWER OF ATTORNEY

Know all by these presents that the undersigned hereby constitutes and appoints
each of Christopher P. Marr, Kathleen A. Weigand and Nicholas Katzakis signing
singly, and with full power of substitution, the undersigned's true and lawful
attorney-in-fact to:

     (1) execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer and/or trustee of U-Store-It Trust (the "Company"), Forms
3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of
1934 and the rules thereunder;

     (2) execute for and on behalf of the undersigned Form 144s in accordance
with Rule 144 ("Rule 144") promulgated under the Securities Act of 1933;

     (3) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such Form 3, 4,
5 or 144, and timely file such form with the United States Securities and
Exchange Commission and any stock exchange or similar authority; and

     (4) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
and in the best interest of, or legally required by, the undersigned.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934 or Rule 144 of the
Securities Act of 1933;

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, 5 and 144 with respect to
the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 25th day of May, 2006.


                                        /s/ Robert J. Amsdell
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                                        Robert J. Amsdell