Document:

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                                                                    Exhibit 10.5

                                                                       EXECUTION

                AMENDED AND RESTATED SECURITYHOLDERS AGREEMENT
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          THIS AMENDED AND RESTATED SECURITYHOLDERS AGREEMENT (this "Agreement")
                                                                     ---------
is made as of July 1, 1999, by and among Anthony Crane Rental Holdings, L.P., a
Pennsylvania limited partnership (the "Partnership"), ACR Management, L.L.C., a
                                       -----------
Delaware limited liability company and the sole general partner of the
Partnership (the "General Partner") and each of the securityholders from time to
                  ---------------
time a party hereto (the "Securityholders").  Capitalized terms used but not
                          ---------------
otherwise defined herein are defined in Section 8 hereof or in the Partnership
Agreement referred to below.

          Certain of the Securityholders are parties to a Securityholders
Agreement, dated as of July 21, 1998 (the "Old Agreement").
                                           -------------

          The Partnership, the General Partner and the Securityholders desire to
enter into this Agreement for the purposes of, among others, amending and
restating the Old Agreement, adding certain new Securityholders as parties to
this Agreement and making certain newly-issued securities of the Partnership
subject to this Agreement and to restrict the sale, assignment, transfer,
encumbrance or other disposition of the Securities.

          NOW, THEREFORE, in consideration of the mutual covenants contained
herein and other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, the parties to this Agreement, intending to be
legally bound, hereby agree as follows:

1.  Restrictions on Transfer of Securities.
    --------------------------------------

(1)  Transfer of Securities.  No holder of Other Securities shall sell,
     ----------------------
     transfer, assign, pledge or otherwise dispose of (whether with or without
     consideration and whether voluntarily or involuntarily or by operation of
     law) any interest in such holder=s Securities (a "Transfer"), except
                                                       --------
     pursuant to (i) Section 1(b) or 1(d) hereof, (ii) a Public Sale, (iii) a
     Liquidity Event pursuant to Section 5, (iv) a repurchase pursuant to the
     Executive Agreements or (v) the consent of the Board; provided that the
                                                           -------- ----
     applicable requirements of Sections 2 and 3 (if any) are also satisfied.

(2)  Participation Rights.
     --------------------

(1)  If one or more of the Bain Group  (the "Transferring Securityholders")
                                             ----------------------------
     desires to Transfer all or any portion of any class of its Securities to
     any Person(s), they must first deliver to all of the other holders of such
     class of Securities (the "Other Securityholders") a written notice (the
                               ---------------------
     "Sale Notice") in which the prospective Transferring Securityholders state
     ------------
     the price and other material terms and conditions on which they propose to
     effect such Transfer of Securities, or portion thereof, and the identity of
     the proposed Transferee(s).  For purposes of this Section 1(b), a
<PAGE>

     Transfer by the Bain Group shall include a transfer by the holders of the
     equity securities of the Bain Group and a transfer of any securities which
     has the economic effect of a Transfer of the equity securities of the Bain
     Group and such transfers will be deemed to be a Transfer by the Bain Group
     for purposes of determining the rights of Other Securityholders under this
     Section 1(b). Each Other Securityholder to whom such a Sale Notice is given
     may within 15 days following receipt of the Sale Notice, give to the
     Partnership, the General Partner and the Transferring Securityholders a
     written notice ("Tag-Along Notice") indicating that it desires to
                      ----------------
     participate in such Transfer. If any Other Securityholders have elected to
     participate in such Transfer, each of the Transferring Securityholders and
     such Other Securityholders will be entitled to sell in the contemplated
     Transfer, at the same price and on the same terms and conditions, a number
     of Securities of such class equal to the product of (A) the quotient
     determined by dividing the number of Securities of such class owned by such
     person by the aggregate number of Securities of such class owned by the
     Transferring Securityholders and the Other Securityholders participating in
     such Transfer and (B) the number of Securities of such class to be sold in
     the contemplated Transfer (the "Pro Rata Share").  Notwithstanding the
                                     --------------
     foregoing, in the event that the Transferring Securityholders intend to
     Transfer more than one class of Securities, the Other Securityholders
     participating in such Transfer shall be required to sell in the
     contemplated Transfer a pro rata portion of all such classes of Securities
     (to the extent such Other Securityholders own any such other classes of
     Securities), which portion shall be determined in the manner set forth
     immediately above.

               For example (by way of illustration only), if the Sale Notice
               -----------------------------------------
               contemplated a sale of 100 Class A Common Units by the
               Transferring Securityholders, and if the Transferring
               Securityholders at such time owns 30% of the Class A Common Units
               and if one Other Securityholder elects to participate and owns
               20% of the Class A Common Units, the Transferring Securityholders
               would be entitled to sell 60 Class Common A Units (30% / 50% x
               100 units) and the Other Securityholder would be entitled
               to sell 40 Class A Common Units (20% / 50% x 100 units).

(2)  The Transferring Securityholders will use reasonable efforts to obtain the
     agreement of the prospective Transferee(s) to the participation of the
     Other Securityholders in any contemplated Transfer, and
<PAGE>

     the Transferring Securityholders will not Transfer any of their Securities
     to the prospective Transferee(s) unless (A) simultaneously with such
     transfer, the prospective Transferee or Transferees purchase from the Other
     Securityholders the Securities which the Other Securityholders are entitled
     to sell to such prospective Transferee(s) pursuant to paragraph 1(b)(i)
     above or (B) simultaneously with such transfer, the Transferring
     Securityholders purchase (on the same terms and conditions on which such
     Securities were sold to the transferee(s)) the number of Securities of such
     class from the Other Securityholders which the Other Securityholders would
     have been entitled to sell pursuant to paragraph 1(b)(i) above.

(3)  Transfers by Certain Indirect Owners.  Each holder of Other Securities that
     ------------------------------------
     is not an individual shall not permit (i) the issuance of additional
     interests in such holder or (ii) any Transfer of any interest of any
     Indirect Owner in such holder.  Notwithstanding the foregoing, any Indirect
     Owner of such holder or of another Indirect Owner may Transfer its interest
     in such holder or other Indirect Owner to another Indirect Owner of a
     holder or to a Permitted Transferee or, provided that one or more Permitted
     Transferees at all times controls such holder or Indirect Owner, an
     interest in such holder or Indirect Owner may be transferred to a
     charitable organization; provided that the restrictions contained in this
                              -------- ----
     Section 1(c) will continue to apply to such securities following such
     Transfer and the Permitted Transferees thereof will be required, prior to
     the effectiveness of such Transfer, to execute a written agreement in form
     and substance satisfactory to the Board pursuant to which such Permitted
     Transferees acknowledge and agree to be bound by the Transfer restrictions
     contained in this Agreement (including, without limitation, this Section
     1(c)).  To the extent such securities are certificated, the certificates
     evidencing the equity securities of such holder and each Indirect Owner
     will be stamped or otherwise imprinted with a legend referencing the
     restrictions on transfer contained in this Section 1(c).

(4)  Permitted Transfers.  The restrictions contained in this Section 1 shall
     -------------------
     not apply with respect to any Transfer of Securities (i) in the case of any
     natural Person, pursuant to applicable laws of descent and distribution or
     among such Person's Family Group, (ii) in the case of a Carlisle Entity, to
     its stockholders or members, (iii) in the case of any other Person, among
     its Affiliates or (iv) to a Person each Indirect Owner of which is a
     Permitted Transferee (transferees permitted pursuant to clauses (i), (ii),
     (iii) and (iv) above are together referred to herein as "Permitted
                                                              ---------
     Transferees"); provided that the restrictions contained in this Section 1
     -----------    -------- ----
     shall continue to be applicable to such Securities after any
<PAGE>

     such Transfer; and provided further that the applicable requirements
                        -------- -------
     specified in Sections 2 and 3 in connection with such Transfer shall have
     been satisfied.  A Person's "Family Group" means such Person's (or if
                                  ------------
     such Person is not an individual then such Person shall refer to the
     ultimate individual beneficial owners of such Person) grandparents, spouse
     and descendants (whether natural or adopted) of such grandparents and
     spouses of any of them, and any trust or other entity or other vehicle
     formed primarily for the benefit of such Person and/or any of such Person's
     spouse and/or descendants. Notwithstanding the foregoing, no party hereto
     shall avoid the provisions of this Agreement by making one or more
     transfers to one or more Permitted Transferees and then disposing of all or
     any portion of such party's interest in any such Permitted Transferee.

(5)  Management Group Transfers.  On or before June 30, 1999, the Bain Group is
     --------------------------
     specifically authorized to sell (or grant options to purchase) to persons
     who are employees of or who have performed services for the Partnership up
     to a 20% interest in the Common Units and a 20% interest in the Membership
     Interests, at a purchase price equal to the cost to the Bain Group of such
     interests on July 22, 1998.  The participation rights set forth in
     paragraph (b) above shall not apply to any Transfer of Securities described
     in this paragraph (e).

(6)  Termination of Restrictions.  The restrictions set forth in this Section 1
     ---------------------------
     shall continue with respect to each Security until the earlier of (i) the
     consummation of a Liquidity Event pursuant to Section 5 or (ii) the
     consummation of a QPO.  If the consummation of a Transfer pursuant to this
     Section 1 would cause a Liquidity Event to occur, the provisions of Section
     5 (as opposed to this Section 1) shall control such Transfer.

2.  Additional Restrictions on Transfer.
    -----------------------------------

(1)  Restricted Securities Legend.  The Securities have not been registered
     ----------------------------
     under the Securities Act and, therefore, in addition to the other
     restrictions on Transfer contained in this Agreement, cannot be sold unless
     subsequently registered under the Securities Act or an exemption from such
     registration is then available.  To the extent such Securities have been
     certificated, each certificate evidencing Securities and each certificate
     issued in exchange for or upon the Transfer of any Securities (if such
     securities remain Securities as defined herein after such Transfer) shall
     be stamped or otherwise imprinted with a legend in substantially the
     following form:
<PAGE>

     "THE SECURITIES REPRESENTED BY THIS CERTIFICATE WERE ORIGINALLY ISSUED ON
     ____________ AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
     AS AMENDED (THE "ACT"), AND MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE
     OF AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT OR AN EXEMPTION FROM
     REGISTRATION THEREUNDER.  THE SECURITIES REPRESENTED BY THIS CERTIFICATE
     ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER SPECIFIED IN THE
     SECURITYHOLDERS AGREEMENT, DATED AS OF JULY 22, 1998, AS AMENDED AND
     MODIFIED FROM TIME TO TIME, AMONG THE ISSUER (THE "PARTNERSHIP"), AND
     CERTAIN INVESTORS, AND THE PARTNERSHIP RESERVES THE RIGHT TO REFUSE THE
     TRANSFER OF SUCH SECURITIES UNTIL SUCH CONDITIONS HAVE BEEN FULFILLED WITH
     RESPECT TO ANY TRANSFER.  A COPY OF SUCH CONDITIONS SHALL BE FURNISHED BY
     THE PARTNERSHIP TO THE HOLDER HEREOF UPON WRITTEN REQUEST AND WITHOUT
     CHARGE."

The Partnership and/or the General Partner shall imprint such legend on
certificates (if any) evidencing Securities.  The legend set forth above shall
be removed from the certificates (if any) evidencing any Securities which cease
to be Securities in accordance with the definition thereof.  Notwithstanding the
foregoing, to the extent the Securities are not certificated, the Partnership
Agreement will contain a legend in substantially the form stated above.

(2)  Opinion of Counsel.  No holder of Securities may Transfer any Securities
     ------------------
     (except pursuant to an effective registration statement under the
     Securities Act or to a Permitted Transferee or pursuant to Section 4 or 5
     hereof) without first delivering to the Partnership and the General Partner
     an opinion of counsel (reasonably acceptable in form and substance to the
     Board) that neither registration nor qualification under the Securities Act
     and applicable state securities laws is required in connection with such
     Transfer.

(3)  Transfers by the Bain Group.  If any member of the Bain Group sells any
     ---------------------------
     Common Units, or securities into which such Common Units are reorganized
     (except for sales to Affiliates and sales to employees of the Partnership),
     the Company shall contemporaneously redeem, or a member of the Bain Group
     or an independent third party selected by the Bain Group shall purchase,
     with such redemption or purchase being at the option of the holders
     thereof, a corresponding percentage of the Partnership's outstanding Class
     A Preferred Units and Class B Preferred Units (or preferred stock into
     which such Preferred Units are reorganized upon an IPO), along with any
     accrued yield or dividends thereon, which percentage shall be determined by
     dividing the number of Common Units (or their equivalent) to be transferred
     by the Bain Group by the
<PAGE>

     aggregate number of Common Units (or their equivalent) owned by the Bain
     Group as of the date hereof.

3.  Transfer.  Prior to Transferring any Securities (other than pursuant to a
    --------
Liquidity Event pursuant to Section 5, a Public Sale or an IPO), the
Securityholder making such Transfer shall cause the prospective Transferee to be
bound by this Agreement, the Partnership Agreement (if the prospective
Transferee is admitted as a substituted partner under the Partnership
Agreement), the LLC Agreement (if the prospective Transferee is admitted as a
substituted partner under the Partnership Agreement), the Registration Rights
Agreement and any other agreements executed by holders of Units and Membership
Interests relating to such Units and Membership Interests in the aggregate
(collectively, the "Other Agreements") and if the prospective Transferee is
                    ----------------
acquiring Securities subject to an Executive Agreement, the provisions of such
Executive Agreement relating to equity securities, including the repurchase
thereof, and to execute and deliver to the Partnership, the General Partner and
the other holders of Securities counterparts of this Agreement, the Partnership
Agreement (if the Prospective Transferee is admitted as a substituted partner
under the Partnership Agreement), the LLC Agreement (if the Prospective
Transferee is admitted as a substituted member under the LLC Agreement), the
Registration Rights Agreement, the applicable Other Agreements and if applicable
an acknowledgment as to the provisions of such Executive Agreement relating to
equity securities.  Any Transfer or attempted Transfer of any Securities in
violation of any provision of this Agreement shall be void, and the Partnership
or the General Partner, as the case may be, shall not record such Transfer on
its books or treat any purported Transferee of such Securities as the owner of
such securities for any purpose.

4.  Public Offering.
    ---------------
<PAGE>

(1)  If at any time the Board approves a public offering of any of the equity
     securities of the Partnership to be registered under the Securities Act (an
     "IPO") or the requisite percentage of holders (the "Requisite Holders")
      ---                                                -----------------
     otherwise request the Partnership to make a public offering of equity
     securities of the Partnership pursuant to the Registration Rights
     Agreement, the holders of Securities and the Partnership will take all
     necessary or desirable actions in connection with the consummation of such
     registered offering approved by the Board and, to the extent not
     inconsistent therewith, the Requisite Holders.  It is the intent that
     immediately prior to, and contingent upon the consummation of, the initial
     registered offering of equity securities of the Partnership, whether or not
     pursuant to the immediately preceding sentence and whether pursuant to a
     sale by the Partnership or by any Securityholder, (i) a Delaware
     corporation will be incorporated (the "Company"), and (ii) the equity
                                            -------
     securities of the Partnership, except for those securities redeemed
     pursuant to Section 4(d) hereof, will be recapitalized or reorganized
     (whether by merger, exchange, contribution, a combination of the foregoing
     or otherwise) into a single class of common stock of the Company, where all
     holders will receive such common stock in a manner described in Code
     Section 351 (or successor provision or a similar nonrecognition Code
     provision), and in which all Securityholders are eligible to be treated as
     direct or indirect transferors under Code Section 351 (or successor
     provision or a similar nonrecognition Code provision).  Such
     recapitalization, reorganization or exchange will be effected in such a
     manner so that, immediately thereafter, the Securityholders hold only
     securities of the same class as the securities that are to be offered to
     the public in such offering.  The securities to be so held by the
     Securityholders will be allocated, to the extent practicable, among the
     Securityholders (or additional securities will be issued to one or more
     Securityholders) so that, immediately after such recapitalization,
     reorganization or exchange, each Securityholder holds securities having an
     aggregate value equal to the amount which such Securityholder would have
     received if, immediately prior to such recapitalization, reorganization or
     exchange, the Partnership had distributed to its Securityholders an
     aggregate amount equal to the aggregate value of the securities which are
     to be held by all Securityholders immediately after such recapitalization,
     reorganization or exchange in a complete liquidation pursuant to the rights
     and preferences set forth in the Partnership's constituent documents
     immediately prior to such recapitalization, reorganization or exchange,
     with each share of such securities having a "value" for such purposes equal
     to the  price per share of sales to the public as part of such offering.
     Notwithstanding the immediately preceding sentence, and immediately
     following such recapitalization,
<PAGE>

     reorganization or exchange, the holders of Class B Common Units and Class C
     Common Units, as the case may be, shall be allocated at least an aggregate
     minimum number of securities equal to (i) the aggregate price paid for such
     Class B Common Units or Class C Common Units, as the case may be, divided
                                                                       -------
     by (ii) the offering price of such securities to be offered in the IPO.
     --
     Each Securityholder hereby agrees that (if so requested by the Board or the
     Requisite Holders) it will consent to and vote for a recapitalization,
     reorganization or exchange of the existing equity securities of the
     Partnership into a single class of common stock of the Company that is
     consistent with the provisions described above and that the Board and the
     Requisite Holders find acceptable and will take all necessary or desirable
     actions in connection with the consummation of the recapitalization,
     reorganization or exchange. Without limiting the generality of the
     foregoing, each holder of Securities hereby waives any dissenters rights,
     appraisal rights or similar rights in connection with such
     recapitalization, reorganization or exchange.

(2)  Notwithstanding the foregoing, unless the Bain Group otherwise agrees, any
     such recapitalization, reorganization or exchange will be structured and
     implemented in the manner contemplated by Section 13.9 of the Partnership
     Agreement; provided that the shares of the common stock of the Company will
                --------
     be allocated among the Securityholders as described in paragraph (a) above.
     Notwithstanding anything else contained in this Agreement to the contrary,
     this Section 4(b) may not be amended without the prior written consent of
     the Bain Group (so long as it is a Securityholder).

(3)  At least 45 days prior to the consummation of an IPO, the Board shall give
     notice of such event to the holders of the Partnership's Class B Preferred
     Units.  In connection with such IPO, the holders of Class B Preferred Units
     shall have the opportunity, by providing notice to the Partnership not less
     than 30 days prior to such IPO, to elect to exchange up to $5,000,000 of
     Unreturned Capital of such Class B Preferred Units for a number of shares
     of the Company's common stock equal to the quotient of (i) $5,000,000

     divided by (ii) 80% of the price to the public of the Company's common
     ------- --
     stock (rounded to the nearest whole share).  In the event that the holders
     of the Class B Preferred Units elect to exchange such Class B Preferred
     Units for common stock, at the closing of the IPO, the holders of such
     Class B Preferred Units will receive such common stock in a manner
     described in Code Section 351 (or successor provision or a similar
     nonrecognition code provision) and such Class B Preferred Units will be
     cancelled.

(4)  Subject to any restrictions in the Partnership's or its Subsidiaries'
     financing agreements and except to the extent Class B Preferred Units are
     exchanged for shares of the
<PAGE>

     Company's common stock pursuant to Section 4(c) above, in connection with
     the IPO, the General Partner shall use its reasonable best efforts to make
     a distribution in cash to the holders of the Class B Preferred Units in an
     amount equal to the aggregate Unreturned Capital and Unpaid Yield as a
     complete redemption with respect to the Class B Preferred Units outstanding
     at such time (the "IPO Preferred Redemption").  In the event that the
                        ------------------------
     Partnership or its Subsidiaries are not permitted to consummate the IPO
     Preferred Redemption for any reason, the Partnership and the Bain Group,
     prior to the consummation of the IPO, shall cause the Registration Rights
     Agreement to be amended such that the Company common stock received in
     exchange for the Class B Preferred Units pursuant to Section 4(a) above
     shall receive priority on any secondary registrations of the Company's
     equity securities (as described in paragraph 2(d) of the Registration
     Rights Agreement), subject to the secondary registration priority
     previously granted to the Company common stock, if any, received in
     exchange for the Class A Preferred Units.

5.  Liquidity Event.
    --------------

(1)  The Partnership shall seek to effectuate a Liquidity Event upon the request
     of  a majority of the Bain Group (the "Majority Holder").
                                            ---------------

(2)  From and after the time (if any) when the Partnership has informed each of
     the Securityholders that it desires to effectuate a Liquidity Event, the
     Partnership and each holder of Securities shall (i) cooperate in good faith
     to effectuate such Liquidity Event, and (ii) consent to and raise no
     objections against, and take all necessary or desirable actions in
     connection with, the consummation of such Liquidity Event, including those
     reasonably requested by the Seller (as defined below).  Without limiting
     the generality of the foregoing, subject to the terms set forth in this
     Section 5, (i) each holder of Securities hereby waives any dissenters
     rights, appraisal rights or similar rights in connection with such
     Liquidity Event and (ii) if all or any portion of any such Liquidity Event
     is structured as a sale of securities, each holder of Securities shall
     agree to sell any or all of his or its securities and rights to acquire
     securities on the terms and conditions approved by the Board, if such
     Liquidity Event is being effectuated by the Board, or the Majority Holder,
     if such Liquidity Event is being effectuated by the Majority Holder.  The
     Person seeking to effectuate such Liquidity Event is referred to herein as
     the "Seller".
          ------

(3)  In connection with any Liquidity Event (whether by sale, merger,
     recapitalization, reorganization, consolidation, combination or otherwise)
     pursuant to this Section 5, each holder of Securities immediately prior to
     such Liquidity Event shall receive (on behalf of itself and, where
     applicable (e.g., the structure contemplated by Section 13.9 of the
     Partnership Agreement is implemented), its direct and indirect
<PAGE>

     securityholders) the same form of consideration and the same portion of the
     aggregate consideration that such holder of Securities would have received
     if the aggregate consideration paid by the Buyer to all direct and indirect
     securityholders in connection with such Liquidity Event (the "Aggregate
                                                                   ---------
     Consideration") had been paid directly to the Partnership and then
     -------------
     distributed by the Partnership in a complete liquidation pursuant to the
     terms of the Partnership Agreement as in effect immediately prior to such
     Liquidity Event (and after giving effect to any transfer taxes payable in
     connection with such Liquidity Event, the amount of which will be paid
     directly to the persons owing such taxes).  In furtherance thereof, each
     holder of then currently exercisable rights to acquire any class of
     Securities will be given an opportunity to either (A) exercise such rights
     prior to the consummation of such Liquidity Event and participate in such
     sale as holders of such class of Securities or (B) upon the consummation of
     such Liquidity Event, or at such other time agreed to by such holder,
     receive in exchange for (or, if applicable, upon the exercise of) such
     rights, the consideration contemplated to be received by such holder as a
     result of such Liquidity Event in the agreement or instrument pursuant to
     which such holder acquired such rights from the Partnership or, if no such
     consideration is contemplated thereby, the consideration such holder would
     have received if such holder exercised such rights prior to the
     consummation of such Liquidity Event less the amount such holder would have
     paid to the Partnership to exercise such rights.  Each holder of Securities
     shall take all necessary or desirable actions in connection with the
     receipt of the Aggregate Consideration from such Liquidity Event as is
     requested by the Majority Holder to effectuate the foregoing.

(a)  If the Partnership or the holders of the Partnership's securities enter
     into any negotiation or transaction for which Rule 506 (or any similar rule
     then in effect) promulgated by the Securities and Exchange Commission may
     be available with respect to such negotiation or transaction (including a
     merger, consolidation or other reorganization), each holder of Securities
     which is not an accredited investor (as that term is defined in Rule 501 or
     any similar rule then in effect ("Rule 501") promulgated by the Securities
                                       --------
     and Exchange Commission) will, at the request of the Seller, appoint a
     purchaser representative (as such term is defined in Rule 501) reasonably
     acceptable to the Seller. If any holder of Securities appoints a purchaser
     representative designated by the Seller, the Partnership will be
     responsible for the fees of the purchaser representative so appointed.  If
     any holder of Securities declines to appoint the purchaser representative
     designated by the Seller, such holder will appoint another purchaser
     representative (reasonably acceptable to the Seller), and such holder will
     be
<PAGE>

     responsible for the fees of the purchaser representative so appointed.

(4)  The Partnership will pay the costs of any sale of Securities pursuant to a
     Liquidity Event to the extent such costs are incurred for the benefit of
     all holders of Securities and are not otherwise paid by the acquiring
     party, but including in any event the reasonable fees and disbursements of
     one counsel chosen by a majority of the Bain Group (so long as it is a
     Securityholder).  Costs incurred by any holder of Securities on its own
     behalf will not be considered costs of the transaction hereunder.

(5)  The provisions of this Section 5 shall terminate upon the consummation of a
     QPO or a Liquidity Event.

(6)  Notwithstanding the foregoing provisions of this Section 5, unless the Bain
     Group otherwise agrees, any such Liquidity Event will be structured and
     implemented in the manner contemplated by Section 13.9 of the Partnership
     Agreement; provided that the Aggregate Consideration will be paid among the
                --------
     direct and indirect holders of Securities as described in paragraph (c)
     above.  Notwithstanding anything else contained in this Agreement to the
     contrary, this Section 5(g) may not be amended without the prior written
     consent of the Bain Group (so long as they are Securityholders).

(7)  Notwithstanding the foregoing provisions of this Section 5, the Partnership
     shall not effectuate a Liquidity Event unless the Class B Preferred Units
     are either redeemed by the Partnership in connection with such Liquidity
     Event, or sold in such Liquidity Event, for an amount equal to the
     aggregate Unreturned Capital and Unpaid Yield with respect to the Class B
     Preferred Units then outstanding.

(8)  The Majority Holder shall provide Ray G. Anthony and the Carlisle Entities
     with notice of a Liquidity Event at least 5 days prior to the execution of
     a letter of intent or a definitive agreement to effectuate a Liquidity
     Event.

6.  Preemptive Rights.
    -----------------

          (a) Except as set forth in subparagraph (b) below, the Partnership and
the General Partner will not issue, sell or otherwise transfer for consideration
to the Bain Group or its Affiliates  (an "Issuance") at any time prior to an
                                          --------
IPO, any Equity Securities or Membership Interests (the "Preemptive Interests")
                                                         --------------------
unless, at least 30 days and not more than 60 days prior to such issuance, the
Partnership or the General Partner, as the case may be, notifies each
Securityholder in writing of the Issuance (including the price, the purchasers
thereof and the other terms thereof) and grants to each Securityholder, the
right (the "Right") to subscribe for and purchase such Preemptive Interests
            -----
<PAGE>

so issued at the same price and on the same terms as issued in the Issuance such
that, after giving effect to the Issuance and exercise of the Right, the
Preemptive Interests owned by such holder shall represent the same percentage of
the outstanding Class A Common Units, Class L Common Units and Membership
Interests as were owned by such holder prior to the Issuance on a fully diluted
basis, or such lesser amount designated by such holder. The Right may be
exercised by such holder at any time by written notice to the Partnership and
the General Partner, received by the Partnership and the General Partner within
15 days after receipt by such holder of the notice from the Partnership and the
General Partner referred to above. The closing of the purchase and sale pursuant
to the exercise of the Right shall occur at least 10 days after the Partnership
and the General Partner receive notice of the exercise of the Right and
concurrently with the closing of the Issuance. In the event that the
consideration received by the Partnership and the General Partner in connection
with an Issuance is property other than cash, each Securityholder may, at its
election, pay the purchase price for such additional securities in such property
or solely in cash. In the event that any such holder elects to pay cash, the
amount thereof shall be determined based on the fair value of the consideration
received or receivable by the Partnership and/or the General Partner in
connection with the Issuance.

          (b) Notwithstanding the foregoing, the Right shall not apply to
issuances of equity securities (or securities convertible into or exchangeable
for, or options to purchase, such units), pro rata to all holders of Common
Units, as a dividend on, subdivision of or other distribution in respect of, the
Common Units in accordance with the Partnership's Partnership Agreement, nor
issuances of equity securities (or securities convertible into or exchangeable
for, or options to purchase, such membership interests), pro rata to all holders
of Membership Interests, as a dividend on, subdivision of or other distribution
in respect of the Membership Interests in accordance with the General Partner's
LLC Agreement.

          (c) The provisions of this paragraph 6 will terminate upon the
consummation of an IPO.

7.  Change in General Partner.  Without the consent of all of the holders of
    -------------------------
Membership Interests (or other equity interests in a Successor General Partner
described below), no Successor General Partner (as defined in the Partnership
Agreement) will be elected by the Securityholders and admitted to the
Partnership (and no successor general partner of any Subsidiary of the
Partnership will be elected by the Securityholders and admitted to such
Subsidiary) unless such Successor General Partner is a newly formed, single
purpose entity with no other assets or liabilities, and each holder of
Membership Units (or such other equity interests described above) is given an
opportunity to
<PAGE>

purchase an ownership interest in such Successor General Partner
equivalent in value, voting power and other rights and privileges to the
ownership interest in the General Partner which such holder of Membership
Interests (or such other equity interests described above) has in such General
Partner at such time solely in exchange for such holder's Membership Interests
(or such other equity interests described above), and the ownership interests in
such Successor General Partner become subject to this Agreement as if such
ownership interests were Membership Units.  Further, the Securityholders will
not elect to dissolve the General Partner or the Partnership (or any successor
to such entity) in order to evade or avoid the restrictions set forth above, to
remove a holder of Units or Membership Interests, or otherwise to defeat or
evade the intent of this paragraph  7.

8.  Certain Definitions.
    -------------------

          "Affiliate" is defined in the Recapitalization Agreement.
           ---------

          "Bain Group" means the General Partner and Bain/ACR, L.L.C.
           ----------

          "Board" means the Board of Managers of the General Partner.
           -----

          "Carlisle Entities" means Carlisle Construction Co., Inc., Carlisle
           -----------------
Equipment, LLC, Carlisle Excavating, LLC, Greater Cincinnati Marine, LLC and
Morehead Marine, LLC.

          "Class A Common Units" means (i) any Class A Common Units (as defined
           --------------------
in the Partnership Agreement) purchased or otherwise acquired by any
Securityholder, and (ii) any equity securities issued or issuable directly or
indirectly with respect to any of the Class A Common Units referred to in clause
(i) above, by way of a dividend or split or exchange or in connection with a
combination of units, recapitalization, merger, consolidation or other
reorganization.

          "Class A Preferred Units" means (i) any Class A Preferred Units (as
           -----------------------
defined in the Partnership Agreement) purchased or otherwise acquired by any
Securityholder, and (ii) any equity securities issued or issuable directly or
indirectly with respect to any of the Class A Preferred Units referred to in
clause (i) above, by way of a dividend or split or exchange or in connection
with a combination of units, recapitalization, merger, consolidation or other
reorganization.

          "Class B Common Units" means (i) any Class B Common Units (as defined
           --------------------
in the Partnership Agreement) purchased or otherwise acquired by any
Securityholder, and (ii) any equity securities issued or issuable directly or
indirectly with respect to any of the Class B Common Units referred to in clause
(i) above, by way of a dividend or split or exchange or in connection with a
combination of units, recapitalization, merger, consolidation or other
reorganization.

          "Class B Preferred Units" means (i) any Class B Preferred Units (as
           -----------------------
defined in the Partnership Agreement) purchased or otherwise acquired by any
Securityholder, and (ii) any equity securities issued or issuable directly or
indirectly with respect to any of the Class B Preferred Units referred to in
clause (i) above, by way of a dividend or split or exchange or in connection
with a combination of units, recapitalization, merger, consolidation or other
reorganization.
<PAGE>

          "Class C Common Units" means (i) any Class C Common Units (as defined
           --------------------
in the Partnership Agreement) purchased or otherwise acquired by any
Securityholder, and (ii) any equity securities issued or issuable directly or
indirectly with respect to any of the Class C Common Units referred to in clause
(i) above, by way of a dividend or split or exchange or in connection with a
combination of units, recapitalization, merger, consolidation or other
reorganization.

          "Class L Common Units" means (i) any Class L Common Units (as defined
           --------------------
in the Partnership Agreement) purchased or otherwise acquired by any
Securityholder, and (ii) any equity securities issued or issuable directly or
indirectly with respect to any of the Class L Common Units referred to in clause
(i) above, by way of a dividend or split or exchange or in connection with a
combination of units, recapitalization, merger, consolidation or other
reorganization.

          "Code" means the Internal Revenue Code of 1986, as amended.
           ----

          "Common Units" is defined in the Partnership Agreement.
           ------------

          "Executive Agreements" means each of the Executive Purchase Agreements
           --------------------
entered into from time to time by and among the Partnership, the General
Partner, Bain/ACR, L.L.C. and certain of the executives of the Partnership and
the General Partner.

          "Equity Securities" is defined in the Partnership Agreement.
           -----------------

          "General Partner" is defined in the preamble.
           ---------------

          "Indirect Owner" means with respect to each Person which is (i) a
           --------------
corporation or any similar entity, each shareholder and each Indirect Owner of
such shareholder; (ii) a limited liability company or any similar entity, each
member and each Indirect Owner of such member; (iii) a partnership (whether
limited or general) or similar entity, each partner and each Indirect Owner of
such partner; (iv) a trust or any similar entity, each beneficiary who has the
legal right (or whose spouse has the present legal right) to demand a
distribution of the trust's interest and each Indirect Owner of such beneficiary
or such beneficiary's spouse (whether in such beneficiary's capacity as a
beneficiary, trustee or otherwise and whether by revocation or amendment of such
trust or otherwise).

          "IPO" has the meaning set forth in Section 4(a).
           ---

          "Liquidity Event" is defined in the Partnership Agreement.
           ---------------
<PAGE>

          "LLC Agreement"means the Limited Liability Company Agreement of the
           -------------
General Partner, as such agreement may be modified or amended from time to time.

          "Membership Interests" means membership interests in the General
           --------------------
Partner.

          "Other Securities" means Securities owned by Securityholders that are
           ----------------
not a part of the Bain Group.

          "Partnership Agreement" means the Fifth Amended and Restated
           ---------------------
Partnership Agreement of the Partnership, as such agreement may be further
modified or amended from time to time.

          "Preferred Units" means the Class A Preferred Units and Class B
           ---------------
Preferred Units of the Partnership.

          "Public Sale" means any sale of Securities to the public pursuant to
           -----------
an offering registered under the Securities Act or to the public through a
broker, dealer or market maker pursuant to the provisions of Rule 144 adopted
under the Securities Act.

          "QPO" means a public offering either (a) where the Partnership (or its
           ---
successor entity) has received net proceeds of at least $75 million (measured as
of the time of issuance) or (b) which includes Securities constituting at least
20% of the Partnership's (or its successor entity's) outstanding Securities
(measured as of the date of determination).

          "Recapitalization Agreement" means that certain Amended and Restated
           --------------------------
Recapitalization Agreement, dated  July 22, 1998, by and among the Partnership,
Bain/ACR, L.L.C., ACR Management, L.L.C., Ray G. Anthony and the other parties
signatory thereto, as amended from time to time.

          "Registration Rights Agreement" means that certain Registration Rights
           -----------------------------
Agreement, dated as of July 22, 1998, between the Partnership and its
securityholders, as amended or modified from time to time.

          "Securities" means, collectively, Class A Common Units, Class B Common
           ----------
Units, Class C Common Units, Class L Common Units, Preferred Units, Membership
Interests and any other equity interests of the Partnership or the General
Partner, but explicitly excluding rights to acquire equity interests of the
Partnership or the General Partner.  As to any particular Securities, such units
and membership interests shall cease to be Securities when they have been
disposed of in a Public Sale or repurchased by the Partnership, the General
Partner or any Subsidiary.

          "Securities Act" means the Securities Act of 1933, as amended, and
           --------------
applicable rules and regulations thereunder, and any successor to such statute,
rules or regulations.  Any reference
<PAGE>

herein to a specific section, rule or regulation of the Securities Act shall be
deemed to include any corresponding provisions of future law.

          "Securities and Exchange Commission" includes any governmental body or
           ----------------------------------
agency succeeding to the functions thereof.

          "Subsidiary" is defined in the Partnership Agreement.
           ----------

          "Unreturned Capital" is defined in the Partnership Agreement.
           ------------------

          "Unpaid Yield" is defined in the Partnership Agreement.
           ------------

9.  Amendment and Waiver.  Except as otherwise provided herein, no modification,
    --------------------
amendment or waiver of any provision of this Agreement shall be effective
against the Partnership, the General Partner or the holders of Securities unless
such modification, amendment or waiver is approved in writing by the holders of
at least a majority of the Securities held by the Bain Group; provided that no
                                                              -------- ----
such amendment or modification that would adversely affect holders of one class
or group of Securities in a manner different than holders of any other class or
group of Securities (other than amendments and modifications in connection with
the issuances of Equity Securities permitted by Section 3.6 of the Partnership
Agreement) shall be effective against the holders of such class or group of
Securities without the prior written consent of holders of at least a majority
of Securities of such class or group adversely affected thereby.  No failure by
any party to insist upon the strict performance of any covenant, duty, agreement
or condition of this Agreement or to exercise any right or remedy consequent
upon a breach thereof shall constitute a waiver of any such breach or any other
covenant, duty, agreement or condition.

10.  Severability.  Whenever possible, each provision of this Agreement will be
     ------------
interpreted in such manner as to be effective and valid under applicable law,
but if any provision of this Agreement is held to be invalid, illegal or
unenforceable in any respect under any applicable law or rule in any
jurisdiction, such invalidity, illegality or unenforceability will not affect
any other provision or the effectiveness or validity of any provision in any
other jurisdiction, and this Agreement will be reformed, construed and enforced
in such jurisdiction as if such invalid, illegal or unenforceable provision had
never been contained herein.

11.  Entire Agreement.  This Agreement, those documents expressly referred to
     ----------------
herein and other documents of even date herewith embody the complete agreement
and understanding among the parties and supersede and preempt any prior
understandings, agreements or representations by or among the parties, written
or
<PAGE>

oral, which may have related to the subject matter hereof in any way.

12.  Successors and Assigns.   Except as otherwise provided herein, this
     ----------------------
Agreement shall bind and inure to the benefit of and be enforceable by the
Partnership, the General Partner and their successors and permitted assigns and
the Securityholders and any subsequent holders of Securities and the respective
successors and permitted assigns of each of them, so long as they hold
Securities. Neither the Partnership nor the General Partner may assign any of
its obligations under this Agreement (other than in connection with a merger,
consolidation or other form of reorganization permitted by other sections of
this Agreement) without the prior written consent of a majority of the Bain
Group.

13.  Counterparts.  This Agreement may be executed in separate counterparts each
     ------------
of which will be an original and all of which taken together will constitute one
and the same agreement.

14.  Remedies.    Any Person having rights under any provision of this Agreement
     --------
shall be entitled to enforce such rights specifically to recover damages caused
by reason of any breach of any provision of this Agreement and to exercise all
other rights granted by law.  The parties hereto agree and acknowledge that
money damages may not be an adequate remedy for any breach of the provisions of
this Agreement and that any party may in its sole discretion apply to any court
of law or equity of competent jurisdiction (without posting any bond or other
security) for specific performance and for other injunctive relief in order to
enforce or prevent violation of the provisions of this Agreement.  Nothing
contained in this Agreement will be construed to confer upon any Person who is
not a signatory hereto any rights or benefits, as a third party beneficiary or
otherwise.

15.  Notices.  Any notice provided for in this Agreement will be in writing and
     -------
will be either personally delivered, or received by certified mail, return
receipt requested, or sent by reputable overnight courier service (charges
prepaid) to the Partnership at the address set forth below and to any other
recipient and to any subsequent holder of Securities subject to this Agreement
at such address as indicated by the Partnership=s records, or at such address or
to the attention of such other person as the recipient party has specified by
prior written notice to the sending party.  Notices will be deemed to have been
given hereunder when delivered personally, three days after deposit in the U.S.
mail and one day after deposit with a reputable overnight courier service.  The
Partnership's and General Partner's addresses are:
<PAGE>

          To the Partnership:
          ------------------
          Anthony Crane Rental Holdings, L.P.
          1165 Camp Hollow Road
          West Mifflin, PA  15122
          Attention:   Ray G. Anthony

          To the General Partner:
          ----------------------
          ACR Management, L.L.C.
          c/o Bain Capital Inc.
          Two Copley Place
          Boston, MA  02116
          Attention:  Paul Edgerley
                  Joe Pretlow
                  Paige Daly

16.  Governing Law.  This Agreement shall be governed by, and construed in
     -------------
accordance with, the laws of the Commonwealth of Pennsylvania, without giving
effect to any choice of law or conflict of law rules or provisions (whether of
the Commonwealth of Pennsylvania or any other jurisdiction) that would cause the
application of the laws of any jurisdiction other than the Commonwealth of
Pennsylvania.  Any dispute relating hereto shall be heard in the state or
federal courts of Pennsylvania, and the parties agree to jurisdiction and venue
therein.

17.  Descriptive Headings; Interpretation.  The descriptive headings of this
     ------------------------------------
Agreement are inserted for convenience only and do not constitute a substantive
part of this Agreement.  Whenever required by the context, any pronoun used in
this Agreement shall include the corresponding masculine, feminine or neuter
forms, and the singular form of nouns, pronouns and verbs shall include the
plural and vice versa.  The use of the word "including" in this Agreement shall
be by way of example rather than by limitation.  Reference to any agreement,
document or instrument means such agreement, document or instrument as amended
or otherwise modified from time to time in accordance with the terms thereof,
and if applicable hereof.  Without limiting the generality of the immediately
preceding sentence, no amendment or other modification to any agreement,
document or instrument that requires the consent of any Person pursuant to the
terms of this Agreement or any other agreement will be given effect hereunder
unless such Person has consented in writing to such amendment or modification.
The use of the words "or," "either" and "any" shall not be exclusive.

18.  No  Strict Construction. The parties hereto have participated jointly in
     -----------------------
the negotiation and drafting of this Agreement.  In the event an ambiguity or
question of intent or interpretation arises, this Agreement shall be construed
as if drafted jointly by the parties hereto, and no presumption or burden of
proof shall arise favoring or disfavoring any party by virtue of the authorship
of any of the provisions of this Agreement.
<PAGE>

19.  Issuances of Additional Securities.  Notwithstanding anything contained
     ----------------------------------
herein to the contrary, neither the Partnership nor the General Partner shall
issue any securities of the same type as any Securities held by any
Securityholder to any recipient that is not a party hereto (other than in
connection with a public offering of the Partnership's equity securities
registered under the Securities Act) unless the recipient thereof executes the
agreements that such recipient would be required to execute pursuant to Section
3 if such recipient were a transferee of such securities, thereby becoming a
party hereto and thereto, prior to, or concurrently with, receiving securities
of the Partnership or the General Partner.   Any issuance or attempted issuance
in violation of any provision of this Agreement shall be void, and neither the
Partnership nor the General Partner shall record such issuance on its books or
treat any purported recipient of such securities as the owner of such securities
for any purpose.

                                 * * * * *
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have executed this Amended and
Restated Securityholders Agreement as of the day and year first above written.

                         ANTHONY CRANE RENTAL HOLDINGS, L.P.

                         By:  ACR Management, L.L.C.
                         Its:  General Partner

                         By:
                             -------------------------------------------
                         Its:
                             -------------------------------------------

                         ACR MANAGEMENT, L.L.C.

                         By:
                             -------------------------------------------

                         Its:
                             -------------------------------------------

                         BAIN/ACR, L.L.C.

                         By:
                             -------------------------------------------

                         Its:
                             -------------------------------------------

                         ANTHONY IRON AND METAL COMPANY

                         By:
                             -------------------------------------------
                              A General Partner

                         CARLISLE CONSTRUCTION CO., INC.

                         By:
                             -------------------------------------------

                         Its:
                             -------------------------------------------
<PAGE>

Continuation of signature page to
the Amended and Restated
Securityholders Agreement

                         ---------------------------------------------------
                         Bryan Carlisle

                         ---------------------------------------------------
                         Robert Carlisle

                         ---------------------------------------------------
                         Gary Strassel

                         ---------------------------------------------------
                         Bruce Lott

                         ---------------------------------------------------
                         Gary Hoffman

                         ---------------------------------------------------
                         Bert Adams
<PAGE>

Continuation of signature page to
the Amended and Restated
Securityholders Agreement

                         ---------------------------------------------------
                         David W. Mahokey

                         ---------------------------------------------------
                         Arthur J. Innamorato

                         ---------------------------------------------------
                         Albert C. Bove

                         ---------------------------------------------------
                         William B. Kania

                         ---------------------------------------------------
                         Dale Buckwalter

                         ---------------------------------------------------
                         Richard Ferchak, Sr.

                         ---------------------------------------------------
                         Ray Graham

                         ---------------------------------------------------
                         Joseph Connelly

                         ---------------------------------------------------
                         Mike Corn

                         ---------------------------------------------------
                         Richard Rossi

                         ---------------------------------------------------
                         Frank Hanjorgiris<PAGE>

                                                                   EXHIBIT 10.24

                                                                [EXECUTION COPY]

                               BAIN/ACR, L.L.C.
                       EXECUTIVE UNIT PURCHASE AGREEMENT
                       ---------------------------------

          THIS EXECUTIVE UNIT PURCHASE AGREEMENT (this "Agreement") is made as
                                                        ---------
of May 21, 1999, by and between Bain/ACR, L.L.C., a Delaware limited liability
company ("Bain/ACR"), Anthony Crane Rental Holdings, L.P., a Pennsylvania
          --------
limited partnership ("Holdings"), ACR Management, L.L.C., a Delaware limited
                      --------
liability company and the general partner of Holdings and Anthony Crane ("ACR
                                                                          ---
Management") and David W. Mahokey ("Executive").  Any capitalized terms used
----------                          ---------
herein and not otherwise defined shall have the meanings assigned to them in
Section 5 hereof.

          WHEREAS, Bain/ACR, Holdings, ACR Management and Executive desire to
enter into this Agreement (i) to provide for the sale to Executive by Bain/ACR
of 19,856.70 of Holding's Class A Common Units (the "Class A Units"), 2,206.30
                                                     -------------
of Holding's Class L Common Units (the "Class L Units") a 0.5% Membership
                                        -------------
Interest in ACR Management (the "Membership Interest", and collectively with any
                                 -------------------
Class A Units and Class L Units, the "Purchased Units"), (ii) to provide for the
                                      ---------------
issuance to Executive by Holdings of 55,714.67 of Holding's Class B Common Units
(the "Class B Units") and 55,714.67 of Holding's Class C Common Units (the
      -------------
"Class C Units", and collectively with such Class B Units, the "Incentive
                                                                ---------
Units") and (iii) to provide for certain rights and obligations of the parties
-----
with respect to the Purchased Units and the Incentive Units (collectively, the
"Executive Units").
----------------

          NOW THEREFORE, in consideration for the promises contained herein and
the mutual obligations of the parties hereto, the receipt and sufficiency of
which are hereby acknowledged, Bain/ACR, Holdings, ACR Management and the
Executive hereto agree as follows:

     1.  Purchase and Sale of Executive Units.
         ------------------------------------

          (a) Upon execution of this Agreement, (i) Executive shall purchase,
and Bain/ACR  shall sell, 19,856.70 Class A Units at a price of $1.00 per unit
and 2,206.30 Class L Units at a price of $81.00 per unit, (ii) Executive shall
purchase, and Bain/ACR shall sell, a 0.5% Membership Interest in ACR Management
for $6,432.93, and (iii) and Executive shall purchase, and Holdings shall sell,
55,714.67 Class B Units at a price of $0.70 per unit and 55,714.67 Class C Units
at a price of $0.40 per unit.  Holdings shall deliver to Executive an executed
copy of the Fourth Amended and Restated Limited Partnership Agreement of
Holdings (the "Partnership Agreement") indicating Executive's ownership of such
               ---------------------
Class A Units, Class L Units, Class B Units and Class C Units and an executed
copy of the First Amended and Restated Limited Liability Company Agreement of
ACR Management (the "LLC Agreement") indicating Executive's ownership of such
                     -------------
Membership Interest, and Executive shall deliver a cashier's check or wire
transfer of funds in the aggregate amount of $205,000 to Bain/ACR and a
cashier's check or wire transfer of funds in the aggregate amount of $61,286.14
to Holdings.

          (b) Within 30 days after Executive purchases any Executive Units from
Bain/ACR, Executive shall make an effective election with the Internal Revenue
Service under

                                      -1-
<PAGE>

Section 83(b) of the Internal Revenue Code and the regulations promulgated
thereunder in the form of Exhibit A attached hereto.
                          ---------

          (c) Concurrently with the execution of this Agreement, Executive will
enter into an Employment Agreement with Anthony Crane in the form of Exhibit B
                                                                     ---------
attached hereto (the "Employment Agreement").
                      --------------------

     2.  Representations and Warranties; Acknowledgments.
         -----------------------------------------------

          (a) Representations and Warranties by Executive.  In connection with
              -------------------------------------------
the purchase and sale of the Executive Units hereunder, Executive represents and
warrants to Bain/ACR, Holdings and ACR Management that:

               (i) The Executive Units to be acquired by Executive pursuant to
     this Agreement shall be acquired for Executive's own account and not with a
     view to, or intention of, distribution thereof in violation of the
     Securities Act, or any applicable state securities laws, and the Executive
     Units shall not be disposed of in contravention of the Securities Act or
     any applicable state securities laws.

               (ii) Executive is an executive officer of Anthony Crane, is
     sophisticated in financial matters and is able to evaluate the risks and
     benefits of the investment in the Executive Units.

               (iii) Executive is able to bear the economic risk of his
     investment in the Executive Units for an indefinite period of time because
     the Executive Units have not been registered under the Securities Act and,
     therefore, cannot be sold unless subsequently registered under the
     Securities Act or an exemption from such registration is available.

               (iv) Executive has had an opportunity to ask questions and
     receive answers concerning the terms and conditions of the offering of
     Executive Units and has had full access to such other information
     concerning Holdings and ACR Management as he has requested.  Executive has
     also reviewed, or has had an opportunity to review, the following
     documents: (A) the Partnership Agreement; (B) the LLC Agreement; (C) the
     loan agreements, notes and related documents with the senior and
     subordinated lenders of Holdings; and (D) Holdings' audited and unaudited
     financial statements.

               (v) The execution, delivery and performance of this Agreement by
     Executive do not and shall not conflict with, breach, violate or cause a
     default under any contract, agreement, instrument, order, judgment or
     decree to which Executive is a party or by which he is bound and upon the
     execution and delivery of this Agreement by Bain/ACR, Holdings and ACR
     Management, this Agreement shall be the legal, valid and binding obligation
     of Executive, enforceable in accordance with its terms.

               (vi) Executive is not a party to or bound by any employment
     agreement, noncompete agreement or confidentiality agreement with any
     person or entity other than Anthony Crane.

                                      -2-
<PAGE>

               (vii)  Executive has consulted with independent legal counsel
     regarding his rights and obligations under this Agreement and he fully
     understands the terms and conditions contained herein.

          (b)  Acknowledgments.
               ---------------

               (i) As an inducement to Bain/ACR and Holdings to sell the
     Executive Units to Executive, as a condition thereto, Executive
     acknowledges and agrees that:

                    (A) neither the sale of the Executive Units to Executive nor
          any provision contained herein shall entitle Executive to remain in
          the employment of Anthony Crane or affect the right of Anthony Crane
          to terminate Executive's employment at any time; and

                    (B) neither Bain/ACR nor Holdings shall have any duty or
          obligation to disclose to Executive, and Executive shall have no right
          to be advised of, any material information regarding Holdings and its
          Subsidiaries at any time prior to, upon or in connection with the
          repurchase of Executive Units upon the termination of Executive's
          employment with Anthony Crane or as otherwise provided hereunder.

               (ii) Bain/ACR, Holdings and Executive acknowledge and agree that
     this Agreement has been executed and delivered, and the Executive Units
     have been sold hereunder, in connection with and as a part of the
     compensation and incentive arrangements between Holdings and Executive.

     3.  Right to Purchase Executive Units Upon Termination of Employment.
         ----------------------------------------------------------------

          (a) Repurchase Option.  In the event that Executive is no longer
              -----------------
employed by Anthony Crane for any reason (the date of such termination being
referred to herein as the "Termination Date"), the Incentive Units, whether held
                           ----------------
by Executive or one or more Permitted Transferees, will be subject to repurchase
by Holdings, Bain/ACR and/or ACR Management pursuant to the terms and conditions
set forth in this Section 3 (the "Repurchase Option").
                                  -----------------

          (b) Termination Other than for Cause.  If Executive is no longer
              --------------------------------
employed by Anthony Crane as a result of Executive's death or permanent
disability (as determined by the Board in its good faith judgment), Executive's
termination by Anthony Crane without Cause or voluntary termination, then on or
after the Termination Date, (1) Holdings may elect to purchase all or any
portion of (i) the Vested Incentive Units at a price per unit equal to the Fair
Market Value thereof as determined as of a date set by the Board within thirty
(30) days prior to the delivery of the Repurchase Notice (as defined in
subparagraph 3(d) below) and (ii) the Unvested Incentive Units at a price per
unit equal to the lower of their Original Cost or the Fair Market Value thereof
determined as described in clause 3(b)(1) above.

          (c) Termination for Cause.  If Executive is no longer employed by
              ---------------------
Anthony Crane as a result of Executive's termination for Cause, then on or after
the Termination Date,

                                      -3-
<PAGE>

Holdings may elect to purchase all or any portion of the Incentive Units at a
price equal to the lower of the Original Cost thereof or the Fair Market Value
thereof determined as described in clause 3(b)(1) above.

          (d) Repurchase Procedures.  Holdings or ACR Management may elect to
              ---------------------
exercise the right to purchase all or any portion of the Incentive Units
pursuant to the Repurchase Option by delivering written notice (the "Repurchase
                                                                     ----------
Notice") to the holder or holders of such Incentive Units within 180 days after
------
Executive's Termination Date.  The Repurchase Notice will set forth the number
of Incentive Units to be acquired from such holder(s), the aggregate
consideration to be paid for such units and the time and place for the closing
of the transaction.  Holdings may elect to purchase all or any portion of the
Unvested Incentive Units without or before purchasing any Vested Incentive
Units.  If any of the Incentive Units are held by Permitted Transferees of
Executive, Holdings or ACR Management shall purchase the units or membership
interest elected to be purchased from such holder(s) of Incentive Units pro rata
according to the number of Incentive Units held by such holder(s) at the time of
delivery of such Repurchase Notice (determined as nearly as practicable to the
nearest unit).  If both Unvested Incentive Units and Vested Incentive Units are
to be purchased by Holdings or General Partner and Incentive Units are held by
Permitted Transferees of Executive, the number of Unvested Incentive Units and
Vested Incentive Units to be purchased will be allocated among such holders pro
rata according to the total number of Incentive Units to be purchased from such
person.

          (e)  Investors' Rights.
               -----------------

               (i) If for any reason Holdings and/or ACR Management does not
     elect to purchase all of the Incentive Units pursuant to the Repurchase
     Option prior to the 180th day following the Termination Date, Bain/ACR will
     be entitled to exercise the Repurchase Option, in the manner set forth in
     this Section 3, for the Incentive Units Holdings and/or ACR Management has
     not elected to purchase (the "Available Units").  As soon as practicable,
                                   ---------------
     but in any event within thirty (30) days after Holdings determines that
     there will be any Available Units, Holdings or ACR Management will deliver
     written notice (the "Option Notice") to Bain/ACR setting forth the number
                          -------------
     of Available Units and the price for each Available Unit.

               (ii) Bain/ACR will initially be permitted to purchase the
     Available Units by delivering written notice to Holdings and ACR Management
     within twenty (20) days after receipt of the Option Notice from Holdings
     and/or ACR Management (such 20-day period being referred to herein as the
     "Investor Election Period").
     -------------------------

               (iii)  As soon as practicable but in any event within five (5)
     business days after the expiration of the Investor Election Period,
     Holdings or ACR Management will, if necessary, notify the holder(s) of
     Executive Units as to the number of Executive Units being purchased from
     the holder(s) by Bain/ACR (the "Supplemental Repurchase Notice").  The
                                     ------------------------------
     Supplemental Repurchase Notice will set forth the number of Incentive Units
     Holdings, General Partner and Bain/ACR will acquire from such holder(s),
     the aggregate consideration to be paid for such units and the time and
     place of the closing of the transaction.

                                      -4-
<PAGE>

          (f) Closing.  The closing of the transactions contemplated by this
              -------
Section 3 will take place on the date designated by Holdings or ACR Management
in the Repurchase Notice or the Supplemental Repurchase Notice, as the case may
be, which date will not be more than ninety (90) days after the delivery of such
notice.  Holdings, ACR Management and/or Bain/ACR, as the case may be, will pay
for the Incentive Units to be purchased pursuant to the Repurchase Option by
delivery of, in the case of  Bain/ACR, a check payable to the holder of
Incentive Units, and in the case of Holdings or ACR Management (i) a check
payable to the holder of such Incentive Units, (ii) a note or notes payable in
three equal annual installments beginning on the first anniversary of the
Termination Date and bearing interest (payable quarterly) at a rate per annum
equal to 8% or (iii) both (i) and (ii) in the aggregate amount of the purchase
price for such units.  Any notes issued by Holdings pursuant to this paragraph
3(f) shall be subject to any restrictive covenants to which Holdings is subject
at the time of such purchase.   Holdings, ACR Management and/or Bain/ACR, as the
case may be, will receive customary representations and warranties from each
seller regarding the sale of the Incentive Units, including, but not limited to,
the representation that such seller has good and marketable title to the
Incentive Units to be transferred free and clear of all liens, claims and other
encumbrances.

          (g) Termination of Repurchase Right. The rights of Holdings, ACR
              -------------------------------
Management and Bain/ACR to repurchase Incentive Units pursuant to this Section 3
shall terminate upon the earlier of (i) a Sale of the Company or (ii) a Public
Offering.

          4.  Restrictions on Transfer. The parties hereby agree that the
              ------------------------
Executive Units will be subject to the restrictions on Transfer and other
provisions contained in the Securityholders Agreement and will be considered
"Other Securities" for purposes of the Securityholders Agreement.

          5.  Definitions.
              -----------

          "Anthony Crane" means Anthony Crane Rental, L.P., a Pennsylvania
           -------------
limited partnership and a wholly-owned subsidiary of Holdings.

          "Affiliate" shall have the meaning assigned to it in the Partnership
           ---------
Agreement.

          "Board" shall mean the Board of Managers of ACR Management.
           -----

          "Cause" shall have the meaning assigned to it in the Employment
           -----
Agreement.

          "Common Units" is defined in the Partnership Agreement and includes
           ------------
any equity securities issued or issuable directly or indirectly with respect to
such Common Units by way of any dividend or split or exchange or in connection
with a combination of units, recapitalization, merger, consolidation or other
reorganization.

          "Executive Units"  means collectively the Class A Units, Class L
           ---------------
Units, the Class B Units, the Class C Units and the Membership Interest acquired
by the Executive pursuant to Section 1.  Such Units shall continue to be
Executive Units in the hands of any holder other than Executive (except for
Holdings, Bain/ACR and transferees in a Public Sale), and except as otherwise
provided herein, each such other holder of Executive Units shall succeed to all
rights and obligations

                                      -5-
<PAGE>

attributable to Executive as a holder of Executive Units hereunder. Executive
Units shall include both vested and unvested Executive Units and shall include
interests in Holdings or ACR Management issued with respect to Executive Units
by way of any split, dividend or recapitalization.

          "Fair Market Value" of each Executive Unit means the amount which each
           -----------------
such Unit would receive upon a complete liquidation of Holdings and ACR
Management following a sale of Holdings and ACR Management at their aggregate
market value as determined in good faith by the Board and Executive. If the
Board and Executive are unable to agree upon such market value, it shall be
determined in good faith by a nationally recognized investment banking
institution selected by the Board, the fees and expenses of which will be split
evenly between Holdings and ACR Management, on the one hand, and Executive, on
the other hand.

          "LLC Agreement" has the meaning assigned to it in Section 1(a) hereof.
           -------------

          "Original Cost" means $81.00 for each Class L Unit, $1.00 for each
           -------------
Class A Unit,  $0.70 for each Class B Unit, $0.40 for each Class C Unit and
$6,432.93 for the Membership Interest.
          "Partnership Agreement" has the meaning assigned to it in Section 1(a)
           ---------------------
hereof.

          "Permitted Transferee" has the meaning assigned to it in the
           --------------------
Securityholders Agreement.

          "Person" shall mean an individual, a partnership, a corporation, a
           ------
limited liability company, an association, a joint stock company, a trust, a
joint venture, an unincorporated organization and a governmental entity or any
department, agency, or political subdivision thereof.

          "Public Offering" means an offering of Holding's (or a corporate
           ---------------
successor's) equity securities to the public pursuant to an effective
registration statement under the Securities Act.

          "Public Sale" means any sale pursuant to a registered public offering
           -----------
under the Securities Act or any sale to the public pursuant to Rule 144
promulgated under the Securities Act effected through a broker, dealer or market
maker.

          "Recapitalization Agreement" means that certain Recapitalization
           --------------------------
Agreement, dated as of June 1, 1998 and amended as of July 22, 1998, by and
among Holdings, the purchasers listed on the Schedule of Purchasers and the
current owners listed on the Schedule of Current Owners attached thereto.

          "Sale of the Company" means (i) any sale of all or substantially all
           -------------------
(as defined in the Model Business Corporation Act) of the assets of Holdings and
its Subsidiaries on a consolidated basis in one transaction or series of related
transactions, (ii) any sale of all or substantially all of the Common Units in
one transaction or series of related transactions, excluding any sales of Common
Units in a Public Sale or (iii) a merger or consolidation which accomplishes one
of the foregoing.

          "Securities Act" means the Securities Act of 1933, as amended from
           --------------
time to time.

                                      -6-
<PAGE>

          "Securityholders Agreement" means that certain Securityholders
           -------------------------
Agreement, dated as of July 22, 1998 and as amended from time to time, among
Holdings and the signatories parties thereto.

          "Subsidiary" shall have the meaning assigned to it in the Partnership
           ----------
Agreement.

          "Transfer"  shall have the meaning assigned to it in the
           --------
Securityholders Agreement.

          "Units" means collectively the Class L Units, the Class A Units, the
           -----
Class B Units, the Class C Units and the Membership Interests.

          "Unvested Units" means any Executive Units which are not Vested Units.
           --------------

          "Unvested Incentive Units" means any Incentive Units which have not
           ------------------------
become Vested Incentive Units.

          "Vested Units" means any Purchased Units and any Vested Incentive
           ------------
Units.

          "Vested Incentive Units" means any Incentive Units which have become
           ----------------------
vested on a monthly basis in accordance with the following schedule, if as of
each such date Executive is employed by Anthony Crane:

<TABLE>
<CAPTION>
                                        Cumulative Percentage
           Date                       of Incentive Units Vested
           ----                       -------------------------
    <S>                               <C>
    Date of this Agreement                       0%
       August 1, 1999                           20%
       August 1, 2000                           40%
       August 1, 2001                           60%
       August 1, 2002                           80%
       August 1, 2003                          100%
</TABLE>

Notwithstanding the foregoing, upon the occurrence of a Sale of the Company, so
long as Executive is employed by Anthony Crane as of the date on which such Sale
of the Company occurs, all Incentive Units which have not yet become vested
shall immediately become vested; provided that a merger or consolidation
                                 -------- ----
involving Holdings in which the holders of voting securities of Holdings own
more than 25% of the voting securities of the combined entity following such
transaction shall not be considered a Sale of the Company for purposes of the
immediately preceding clause.

          6.  Notices.  Any notice provided for in this Agreement must be in
              -------
writing and must be either personally delivered, mailed by first class mail
(postage prepaid and return receipt requested) or sent by reputable overnight
courier service (charges prepaid) to the Investors at the addresses indicated in
the Company's records and to the other recipients at the address indicated
below:

                                      -7-
<PAGE>

          Notices to Executive:
          --------------------

          David W. Mahokey
          400 Seco Road
          Monroeville, PA  15146

          Notices to Bain/ACR:
          -------------------

          Bain/ACR, L.L.C.
          c/o Bain Capital, Inc.
          Two Copley Place
          Boston, Massachusetts 02116
          Attn:  Robert Gay
                 Paul Edgerley
                 Andrew Balson

          Notices to Holdings:
          -------------------

          Anthony Crane Rental Holdings, L.P.
          400 Seco Road
          Monroeville, PA 15146
          Attn:  David Mahokey
                 Arthur J. Innamorato

          with a copy to:
          --------------

          Kirkland & Ellis
          200 East Randolph Drive
          Chicago, Illinois 60601
          Attn:  James L. Learner, P.C.

or such other address or to the attention of such other person as the recipient
party shall have specified by prior written notice to the sending party.  Any
notice under this Agreement shall be deemed to have been given when so delivered
or sent or, if mailed, five days after deposit in the U.S. mail.

          7.  General Provisions.
              ------------------

          (a) Transfers in Violation of Agreement.  Any Transfer or attempted
              -----------------------------------
Transfer of any Executive Units in violation of any provision of this Agreement
shall be void, and Holdings shall not record such Transfer on its books or treat
any purported transferee of such Executive Units as the owner of such Executive
Units for any purpose.

          (b) Severability.  Whenever possible, each provision of this Agreement
              ------------
shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Agreement is held to be invalid,
illegal or unenforceable in any respect under any applicable law

                                      -8-
<PAGE>

or rule in any jurisdiction, such invalidity, illegality or unenforceability
shall not affect any other provision or any other jurisdiction, but this
Agreement shall be reformed, construed and enforced in such jurisdiction as if
such invalid, illegal or unenforceable provision had never been contained
herein.

          (c) Complete Agreement.  This Agreement, those documents expressly
              ------------------
referred to herein and other documents of even date herewith embody the complete
agreement and understanding among the parties and supersede and preempt any
prior understandings, agreements or representations by or among the parties,
written or oral, which may have related to the subject matter hereof in any way.

          (d) Counterparts.  This Agreement may be executed in separate
              ------------
counterparts, each of which is deemed to be an original and all of which taken
together constitute one and the same agreement.

          (e) Successors and Assigns.  Except as otherwise provided herein, this
              ----------------------
Agreement shall bind and inure to the benefit of and be enforceable by
Executive, Holdings, ACR Management, Bain/ACR and their respective successors
and assigns (including subsequent holders of Executive Units); provided that the
                                                               -------- ----
rights and obligations of Executive under this Agreement shall not be assignable
except in connection with a Permitted Transfer of Executive Units hereunder.

          (f) Arbitration.  Any controversy, dispute or claim arising out of or
              -----------
relating in any way to this Agreement that cannot be resolved by negotiations
between Bain/ACR, Holdings and Executive shall be settled by arbitration in
accordance with the terms and provisions of Section 8.02 of the Recapitalization
Agreement.

          (g) Choice of Law.  The partnership law of the Commonwealth of
              -------------
Pennsylvania shall govern all questions concerning the relative rights of
Holdings and its partners.  The limited liability company law of the State of
Delaware shall govern all questions concerning the relative rights of ACR
Management and its members.  All issues and questions concerning the
construction, validity, enforcement and interpretation of this Agreement and the
exhibits and schedules hereto shall be governed by, and construed in accordance
with, the laws of the Commonwealth of Pennsylvania, without giving effect to any
choice of law or conflict of law rules or provisions (whether of the
Commonwealth of Pennsylvania or any other jurisdiction) that would cause the
application of the laws of any jurisdiction other than the Commonwealth of
Pennsylvania.

          (h) Remedies.  Each of the parties to this Agreement shall be entitled
              --------
to enforce its rights under this Agreement specifically, to recover damages and
costs (including reasonable attorney's fees) caused by any breach of any
provision of this Agreement and to exercise all other rights existing in its
favor.  The parties hereto agree and acknowledge that money damages would not be
an adequate remedy for any breach of the provisions of this Agreement and that
any party may in its sole discretion apply to any court of law or equity of
competent jurisdiction (without posting any bond or deposit) for specific
performance and/or other injunctive relief in order to enforce or prevent any
violations of the provisions of this Agreement.

                                      -9-
<PAGE>

          (i) Amendment and Waiver.  The provisions of this Agreement may be
              --------------------
amended and waived only with the prior written consent of Bain/ACR, Holdings,
ACR Management and Executive.  The provisions of Section 3 may be amended and
waived only with the prior written consent of Bain/ACR, Holdings and ACR
Management.

                                 *      *      *      *

                                      -10-
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have executed this Executive
Unit Purchase Agreement on the date first written above.

                              BAIN/ACR, L.L.C.

                              By: ______________________________________

                              Its:  ______________________________________

                              ANTHONY CRANE RENTAL HOLDINGS, L.P.

                              By:  ACR Management, L.L.C.
                              Its:  General Partner

                              By: ______________________________________

                              Its:  ______________________________________

                              ACR MANAGEMENT, L.L.C.

                              By: ______________________________________

                              Its:  ______________________________________

                              _________________________________________
                              David W. Mahokey

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