Exhibit 4.5

                          10 1/4% Senior Notes due 2009

No. 1                                                    Principal Amount $

                         SBA COMMUNICATIONS CORPORATION

promises to pay to CEDE & CO., or registered assigns, the principal sum of

                   ($              ) on February 1, 2009.

Interest Payment Dates: February 1 and August 1, commencing August 1, 2001

Record Dates:  January 15 and July 15

                                       Dated:  February 2, 2001

                                       SBA COMMUNICATIONS CORPORATION

                                       By:  ___________________________________
                                            Name:
                                            Title:



This is one of the Global Notes referred
to in the within-mentioned Indenture:

STATE STREET BANK AND TRUST COMPANY,
as Trustee

By:  ______________________________
     Authorized Signatory

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                          10 1/4% Senior Notes due 2009

THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE INDENTURE
GOVERNING THIS NOTE) OR ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE BENEFICIAL
OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY CIRCUMSTANCES
EXCEPT THAT (I) THE TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED
PURSUANT TO SECTION 2.07 OF THE INDENTURE, (II) THIS GLOBAL NOTE MAY BE
EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO SECTION 2.06(a) OF THE INDENTURE,
(III) THIS GLOBAL NOTE MAY BE DELIVERED TO THE TRUSTEE FOR CANCELLATION PURSUANT
TO SECTION 2.11 OF THE INDENTURE AND (IV) THIS GLOBAL NOTE MAY BE TRANSFERRED TO
A SUCCESSOR DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF THE COMPANY.

THE SECURITY (OR ITS PREDECESSOR) EVIDENCED HEREBY WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER SECTION 5 OF THE UNITED STATES
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND THE SECURITY
EVIDENCED HEREBY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE
ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH
PURCHASER OF THE SECURITY EVIDENCED HEREBY IS HEREBY NOTIFIED THAT THE SELLER
MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER. THE HOLDER OF THE SECURITY
EVIDENCED HEREBY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A) SUCH SECURITY
MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1)(a) TO A PERSON WHO THE
SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN
RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF
RULE 144A, (b) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144 UNDER THE
SECURITIES ACT, (c) OUTSIDE THE UNITED STATES TO A FOREIGN PERSON IN A
TRANSACTION MEETING THE REQUIREMENTS OF RULE 903 OR 904 UNDER THE SECURITIES ACT
OR (d) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS
OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF COUNSEL IF THE COMPANY SO
REQUESTS), (2) TO THE COMPANY OR (3) PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT AND, IN EACH CASE, IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS
OF ANY STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE JURISDICTION AND (B)
THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER
FROM IT OF THE SECURITY EVIDENCED HEREBY OF THE RESALE RESTRICTIONS SET FORTH IN
(A) ABOVE.

     Capitalized terms used herein shall have the meanings assigned to them in
the Indenture referred to below unless otherwise indicated.

     1.   INTEREST. SBA Communications Corporation, a Florida corporation (the
"Company"), promises to pay interest on the principal amount of this Note at 10
1/4% per annum from February 2, 2001 until maturity. The Company will pay
interest semi-annually in arrears on

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February 1 and August 1 of each year, or if any such day is not a Business Day,
on the next succeeding Business Day (each an "Interest Payment Date"); PROVIDED
that the first such interest payment date shall be August 1, 2001. Interest on
the Notes will accrue from the most recent date on which interest has been paid
or, if no interest has been paid, from February 2, 2001. The Company shall pay
interest (including post-petition interest in any proceeding under any
Bankruptcy Law) on overdue principal and premium, if any, from time to time on
demand at a rate that is 1% per annum in excess of the rate then in effect; it
shall pay interest (including post-petition interest in any proceeding under any
Bankruptcy Law) on overdue installments of interest (without regard to any
applicable grace periods) from time to time on demand at the same rate to the
extent lawful. Interest will be computed on the basis of a 360-day year of
twelve 30-day months.

     2.   METHOD OF PAYMENT. The Company will pay interest on the Notes (except
defaulted interest) to the Persons who are registered Holders of Notes at the
close of business on the January 15 or July 15 next preceding the Interest
Payment Date (each, a "Record Date"), even if such Notes are canceled after such
record date and on or before such Interest Payment Date, except as provided in
Section 2.12 of the Indenture with respect to defaulted interest. The Notes will
be payable as to principal, premium, if any, and interest at the office or
agency of the Company maintained for such purpose within or without the City and
State of New York, or, at the option of the Company, payment of interest may be
made by check mailed to the Holders at their addresses set forth in the register
of Holders, and provided that payment by wire transfer of immediately available
funds will be required with respect to principal of and interest and premium on,
all Global Notes and all other Notes the Holders of which shall have provided
wire transfer instructions to the Company or the Paying Agent prior to the
Record Date. Such payment shall be in such coin or currency of the United States
of America as at the time of payment is legal tender for payment of public and
private debts.

     3.   PAYING AGENT AND REGISTRAR. Initially, State Street Bank and Trust
Company, the Trustee under the Indenture, will act as Paying Agent and
Registrar. The Company may change any Paying Agent or Registrar without notice
to any Holder. The Company or any of its Subsidiaries may act in any such
capacity.

     4.   INDENTURE. The Company issued the Notes under an Indenture dated as of
February 2, 2001 ("Indenture") between the Company and the Trustee. The terms of
the Notes include those stated in the Indenture and those made part of the
Indenture by reference to the Trust Indenture Act of 1939, as amended (15 U.S.
Code ss.ss. 77aaa-77bbbb). The Notes are subject to all such terms, and Holders
are referred to the Indenture and such Act for a statement of such terms. To the
extent any provision of this Note conflicts with the express provisions of the
Indenture, the provisions of the Indenture shall govern and be controlling. The
Notes are obligations of the Company limited to $500 million in maximum
aggregate principal amount.

     5.   OPTIONAL REDEMPTION.

     (A)   EXCEPT AS SET FORTH IN SUBPARAGRAPH (B) OF THIS PARAGRAPH 5, THE
NOTES SHALL NOT BE REDEEMABLE AT THE COMPANY'S OPTION PRIOR TO FEBRUARY 1, 2005.
THEREAFTER, THE NOTES WILL BE SUBJECT TO REDEMPTION AT ANY TIME AT THE OPTION OF
THE COMPANY, IN WHOLE OR

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IN PART, UPON NOT LESS THAN 30 NOR MORE THAN 60 DAYS' NOTICE AT THE REDEMPTION
PRICES (EXPRESSED AS PERCENTAGES OF PRINCIPAL AMOUNT) SET FORTH BELOW PLUS
ACCRUED AND UNPAID INTEREST, IF ANY, TO THE APPLICABLE REDEMPTION DATE (SUBJECT
TO THE RIGHT OF HOLDERS OF RECORD ON THE RELEVANT RECORD DATE TO RECEIVE
INTEREST AND LIQUIDATED DAMAGES DUE ON THE RELEVANT INTEREST PAYMENT DATE), IF
REDEEMED DURING THE TWELVE-MONTH PERIOD BEGINNING ON FEBRUARY 1 OF THE YEARS
INDICATED BELOW:

     Year                                                       Percentage
     ----                                                       ----------

     2005....................................................    105.125%
     2006....................................................    103.417%
     2007....................................................    101.708%
     2008 and thereafter.....................................    100.000%

     (B)   NOTWITHSTANDING THE PROVISIONS OF SUBPARAGRAPH (A) OF THIS PARAGRAPH
5, ON OR PRIOR TO FEBRUARY 1, 2004, THE COMPANY MAY ON ANY ONE OR MORE OCCASIONS
REDEEM UP TO 35% OF THE AGGREGATE PRINCIPAL AMOUNT OF NOTES ISSUED UNDER THE
INDENTURE AT A REDEMPTION PRICE EQUAL TO 110.250% OF THE PRINCIPAL AMOUNT
THEREOF ON THE REDEMPTION DATE WITH THE NET CASH PROCEEDS OF ONE OR MORE PUBLIC
EQUITY OFFERINGS AND/OR STRATEGIC EQUITY INVESTMENTS; PROVIDED THAT AT LEAST 65%
OF THE AGGREGATE PRINCIPAL AMOUNT OF NOTES ISSUED UNDER THE INDENTURE REMAINS
OUTSTANDING IMMEDIATELY AFTER THE OCCURRENCE OF SUCH REDEMPTION (EXCLUDING NOTES
HELD BY THE COMPANY OR ANY OF ITS SUBSIDIARIES);AND PROVIDED, FURTHER, THAT SUCH
REDEMPTION SHALL OCCUR WITHIN 60 DAYS OF THE DATE OF THE CLOSING OF SUCH PUBLIC
EQUITY OFFERING AND/OR STRATEGIC EQUITY INVESTMENT.

     6.   MANDATORY REDEMPTION. Except as set forth in paragraph 7 below, the
Company shall not be required to make mandatory redemption payments with respect
to the Notes.

     7.   REPURCHASE AT OPTION OF HOLDER.

     (a)   Upon the occurrence of a Change of Control, each Holder of Notes
shall have the right to require the Company to repurchase all or any part (equal
to $1,000 or an integral multiple thereof) of such Holder's Notes pursuant to
the offer described below (the "Change of Control Offer") at an offer price in
cash equal to 101% of the aggregate principal amount thereof plus accrued and
unpaid interest to the date of purchase (the "Change of Control Payment").
Within 30 days following any Change of Control, the Company shall mail a notice
to each Holder setting forth the procedures governing the Change of Control
Offer as required by the Indenture.

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     (b)   If the Company or a Restricted Subsidiary consummates any Asset
Sales, within five days of each date on which the aggregate amount of Excess
Proceeds exceeds $10 million, the Company shall commence an offer to all Holders
of Notes (an "Asset Sale Offer") pursuant to Section 3.09 of the Indenture to
purchase, on a pro rata basis, the maximum principal amount (or accreted value,
as applicable) of Notes and such other senior Indebtedness of the Company that
may be purchased out of the Excess Proceeds, at an offer price in cash in an
amount equal to 100% of the principal amount (or accreted value, as applicable)
thereof plus accrued and unpaid interest to the date of purchase (subject to the
right of Holders of record on the relevant record date to receive interest due
on the relevant Interest Payment Date), in accordance with the procedures set
forth in the Indenture and such other senior Indebtedness of the Company. To the
extent that any Excess Proceeds remain after consummation of an Asset Sale
Offer, the Company may use such Excess Proceeds for any purpose not otherwise
prohibited by the Indenture. If the aggregate principal amount of Notes and such
other senior Indebtedness of the Company tendered into such Asset Sale Offer
surrendered by Holders thereof exceeds the amount of Excess Proceeds, the
Trustee shall select the Notes and such other senior Indebtedness to be
purchased on a pro rata basis. Upon completion of such offer to purchase, the
amount of Excess Proceeds shall be reset to zero. Holders of Notes that are the
subject of an offer to purchase will receive an Asset Sale Offer from the
Company prior to any related purchase date and may elect to have such Notes
purchased by completing the form entitled "Option of Holder to Elect Purchase"
on the reverse of the Notes.

     8.   NOTICE OF REDEMPTION. Notice of redemption will be mailed at least 30
days but not more than 60 days before the redemption date to each Holder whose
Notes are to be redeemed at its registered address. Notes in denominations
larger than $1,000 may be redeemed in part but only in whole multiples of
$1,000, unless all of the Notes held by a Holder are to be redeemed. On and
after the redemption date interest ceases to accrue on Notes or portions thereof
called for redemption.

     9.   DENOMINATIONS, TRANSFER, EXCHANGE. The Notes are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Notes may be registered and Notes may be exchanged as provided in
the Indenture. The Registrar and the Trustee may require a Holder, among other
things, to furnish appropriate endorsements and transfer documents and the
Company may require a Holder to pay any taxes and fees required by law or
permitted by the Indenture. The Registrar need not exchange or register the
transfer of any Note or portion of a Note selected for redemption, except for
the unredeemed portion of any Note being redeemed in part. Also, the Registrar
need not exchange or register the transfer of any Notes for a period of 15 days
before a selection of Notes to be redeemed or during the period between a record
date and the corresponding Interest Payment Date.

     10.  PERSONS DEEMED OWNERS. The registered Holder of a Note may be treated
as its owner for all purposes.

     11.  AMENDMENT, SUPPLEMENT AND WAIVER. Subject to certain exceptions, the
Indenture or the Notes may be amended or supplemented with the consent of the
Holders of at least 51% in aggregate principal amount of the then outstanding
Notes voting as a single class, and any existing default or compliance with any
provision of the Indenture or the Notes (other than a default in the payment of
the principal of, premium, if any, or interest on the Notes) may

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be waived with the consent of the Holders of at least 51% of the aggregate
principal amount of the then outstanding Notes voting as a single class. Without
the consent of any Holder of a Note, the Indenture or the Notes may be amended
or supplemented to cure any ambiguity, defect or inconsistency, to provide for
uncertificated Notes in addition to or in place of certificated Notes, to
provide for the assumption of the Company's obligations to Holders of the Notes
in case of a merger or consolidation, to make any change that would provide any
additional rights or benefits to the Holders of the Notes or that does not
adversely affect the legal rights under the Indenture of any such Holder, to
comply with the requirements of the Commission in order to effect or maintain
the qualification of the Indenture under the Trust Indenture Act.

     12.  DEFAULTS AND REMEDIES. Events of Default include: (i) default for 30
days in the payment when due of interest on the Notes; (ii) default in payment
when due of principal of or premium, if any, on the Notes when the same becomes
due and payable at maturity, upon redemption (including in connection with an
offer to purchase) or otherwise, (iii) failure by the Company to comply with
Section 4.10, 4.15 or 5.01 of the Indenture; (iv) failure by the Company for 30
days after notice to the Company by the Trustee or the Holders of at least 25%
in principal amount of the Notes then outstanding voting as a single class to
comply with certain other agreements in the Indenture or the Notes; (v) default
under certain other agreements relating to Indebtedness of the Company which
default (a) is caused by a failure to pay principal of or premium, if any, or
interest on such Indebtedness prior to the expiration of the grace period
provided in such Indebtedness on the date of such default ("Payment Default") or
(b) results in the acceleration of such Indebtedness prior to its express
maturity and, in each case, the principal amount of any such Indebtedness,
together with the principal amount of all other Indebtedness under which there
has been a Payment Default aggregates to $10.0 million or more; (vi) certain
final judgments for the payment of money aggregating in excess of $10.0 million
that remain undischarged for a period of 60 days; and (vii) certain events of
bankruptcy or insolvency with respect to the Company or any of its Restricted
Subsidiaries that is a Significant Subsidiary. If any Event of Default occurs
and is continuing, the Trustee or the Holders of at least 25% in principal
amount of the then outstanding Notes may declare all the Notes to be due and
payable. Notwithstanding the foregoing, in the case of an Event of Default
arising from certain events of bankruptcy or insolvency, all outstanding Notes
will become due and payable without further action or notice. Holders may not
enforce the Indenture or the Notes except as provided in the Indenture. Subject
to certain limitations, Holders of a majority in principal amount of the then
outstanding Notes may direct the Trustee in its exercise of any trust or power.
The Trustee may withhold from Holders of the Notes notice of any continuing
Default or Event of Default (except a Default or Event of Default relating to
the payment of principal or interest) if it determines that withholding notice
is in their interest. The Holders of a majority in aggregate principal amount of
the Notes then outstanding by notice to the Trustee may on behalf of the Holders
of all of the Notes waive any existing Default or Event of Default and its
consequences under the Indenture except a continuing Default or Event of Default
in the payment of interest on, or the principal of, the Notes. The Company is
required to deliver to the Trustee annually a statement regarding compliance
with the Indenture, and the Company is required upon becoming aware of any
Default or Event of Default, to deliver to the Trustee a statement specifying
such Default or Event of Default.

     13.  TRUSTEE DEALINGS WITH COMPANY. The Trustee, in its individual or any
other capacity, may make loans to, accept deposits from, and perform services
for the Company or its

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Affiliates, and may otherwise deal with the Company or its Affiliates, as if it
were not the Trustee.

     14.  NO RECOURSE AGAINST OTHERS. A director, officer, employee,
incorporator or stockholder, of the Company, as such, shall not have any
liability for any obligations of the Company under the Notes or the Indenture or
for any claim based on, in respect of, or by reason of, such obligations or
their creation. Each Holder by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for the issuance
of the Notes.

     15.  AUTHENTICATION. This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

     16.  ABBREVIATIONS. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

     17.  ADDITIONAL RIGHTS OF HOLDERS OF RESTRICTED GLOBAL NOTES AND RESTRICTED
DEFINITIVE NOTES. In addition to the rights provided to Holders of Notes under
the Indenture, Holders of Restricted Global Notes and Restricted Definitive
Notes shall have all the rights set forth in the Registration Rights Agreement
dated as of February 2, 2001, between the Company and the parties named on the
signature pages thereof (the "Registration Rights Agreement").

     18.  CUSIP NUMBERS. Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers
in notices of redemption as a convenience to Holders. No representation is made
as to the accuracy of such numbers either as printed on the Notes or as
contained in any notice of redemption and reliance may be placed only on the
other identification numbers placed thereon.

     The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture and/or the Registration Rights Agreement.
Requests may be made to:

     SBA Communications Corporation
     One Town Center Road
     Boca Raton, FL  33486
     Attention:  General Counsel

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                                 ASSIGNMENT FORM

To assign this Note, fill in the form below: (I) or (we) assign and transfer
this Note to

- -----------------------------------------------------------------------------
(Insert assignee's soc. or tax I.D. no.)

- -----------------------------------------------------------------------------

- -----------------------------------------------------------------------------

- -----------------------------------------------------------------------------

- -----------------------------------------------------------------------------
(Print or type assignee's name, address and zip code)

and irrevocably appoint______________________________________________________
to transfer this Note on the books of the Company. The agent may substitute
another to act for him.

- -----------------------------------------------------------------------------

Date: ______________

                                       Your Signature: ______________________
                                       (Sign exactly as your name appears on the
                                       face of this Note)


Signature Guarantee.

(Participant in a Recognized Signature
Guarantee Medallion Program)

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                       OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Note purchased by the Company pursuant to
Section 4.10 or 4.15 of the Indenture, check the box below:

     [_] Section 4.10                          [_] Section 4.15

     If you want to elect to have only part of the Note purchased by the Company
pursuant to Section 4.10 or Section 4.15 of the Indenture, state the amount you
elect to have purchased:
$________

Date: ________________

                                       Your Signature: _________________________
                                       (Sign exactly as your name appears on the
                                       face of this Note)


Signature Guarantee.

(Participant in a Recognized Signature
Guarantee Medallion Program)

                                       9


              SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE

     The following exchanges of a part of this Global Note for an interest in
another Global Note or for a Definitive Note, or exchanges of a part of another
Global Note or Definitive Note for an interest in this Global Note, have been
made:



                                                                       Principal Amount
                            Amount of                                 of this Global Note       Signature of
                           decrease in         Amount of increase       following such       authorized officer
                        Principal Amount      in Principal Amount        decrease (or           of Trustee or
Date of Exchange       of this Global Note    of this Global Note          increase)           Note Custodian
- ----------------       -------------------    -------------------          ---------           --------------
                                                                                   



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