AMENDMENT NO. 4

Exhibit 4.12.4

AMENDMENT NO. 4

This AMENDMENT No. 4 dated as of December 1, 2006 (“Amendment No.4”), is entered into by and among DAYTON SUPERIOR CORPORATION, an Ohio corporation (“Borrower”), the persons designated as “Lenders” on the signature pages hereto, and GENERAL ELECTRIC CAPITAL CORPORATION, a Delaware corporation, as Agent.

WHEREAS, Borrower, the other Credit Parties, the Lenders (as defined therein) and Agent are party to the Credit Agreement dated as of January 30, 2004, as amended by Amendment No. 1, dated June 30, 2004, Amendment No. 2, dated February 23, 2005, and Amendment No. 3, dated September 29, 2006  (“Original Credit Agreement”; all capitalized terms defined in the Original Credit Agreement and not otherwise defined herein to have the meanings assigned thereto in the Original Credit Agreement or in Annex A thereto); and

WHEREAS, Borrower has requested that the Original Credit Agreement be amended in the manner set forth below.

NOW, THEREFORE, in consideration of the premises and the agreements, provisions and covenants herein contained, Borrower, Credit Parties, the Lenders and Agent agree as follows:

SECTION 1.
AMENDMENTS

Subject to the satisfaction of the conditions to effectiveness referred to in Section 2 below, the Original Credit Agreement is hereby amended as follows:

(a)           Section 1.3(a) of the Original Credit Agreement is amended by replacing the date “June 30, 2004” appearing therein with the date “December 1, 2006”.

(b)           Annex A of the Original Credit Agreement is amended as follows:

(i)            The definition of “Borrowing Base” is amended by replacing the dollar figure “$10,000,000” appearing in clause (f) thereof, with the dollar figure “$15,000,000”.

(ii)           The definition of “Change of Control” is amended and restated in its entirety as follows:

“Change of Control” means and includes:

(a) prior to the consummation of an IPO, any of the following (i) Odyssey Investment Partners and its Related Parties cease to collectively beneficially own either (x) more than 50% of the voting power of the issued and outstanding shares of Stock of Borrower having the right to vote for the election of directors of Borrower under ordinary circumstances or (y) more than 50% of the voting power of the issued and outstanding shares of Stock of a corporation of which Borrower is a wholly owned Subsidiary having the right to vote for the election of directors of such corporation under ordinary circumstances; or (ii) the occurrence of a “Change of Control” (as

defined in the Senior Notes Indenture) or a “Change of Control” (as defined in the Senior Subordinated Notes Indenture), and

(b) from and after the consummation of an IPO, any of the following (i) (x) any “person” or “group” (as such terms are used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), other than Odyssey Investment Partners, one or more of its Related Parties or a Permitted Group, shall become, or obtain rights (whether by means or warrants, options or otherwise) to become, the “beneficial owner” (as defined in Rules 13(d)-3 and 13(d)-5 under the Exchange Act, except that such person or group shall be deemed to have beneficial ownership of all shares that any such person or group has the right to acquire, whether such right is exercisable immediately or only after the passage of time), directly or indirectly, of more than 35% of the voting power of the issued and outstanding shares of Stock of Borrower having the right to vote for the election of directors of Borrower under ordinary circumstances, and (y) Odyssey Investment Partners and its Related Parties and any Permitted Group collectively “beneficially own” (as defined above), directly or indirectly, in the aggregate a lesser percentage of the voting power of the issued and outstanding shares of Stock of Borrower having the right to vote for the election of directors of Borrower under ordinary circumstances and do not have the right or ability to designate for election a majority of the Board of Directors of Borrower; or (ii) the occurrence of a “Change of Control” (as defined in the Senior Notes Indenture) or a “Change of Control” (as defined in the Senior Subordinated Notes Indenture).

(c)           For the purposes of clause (b) of this definition, a person or group shall be deemed to beneficially own Stock in a person held by a parent entity if such person or group beneficially owns (as defined above) more than 50% of the issued and outstanding shares of Stock of such parent entity having the right to vote for the election of directors of such parent entity under ordinary circumstances.

(iii)          The definition of “Commitments” is amended by replacing the phrase “ninety five million dollars ($95,000,000)” appearing therein with the phrase “one hundred thirty million dollars ($130,000,000)”.

(iv)          The definition of “Revolving Loan Commitment” is amended by replacing the phrase “ninety five million dollars ($95,000,000)” appearing therein with the phrase “one hundred thirty million dollars ($130,000,000)”.

(v)           The definition of “Termination Date” is amended by replacing the date “May 31, 2008” appearing therein with the date “July 31, 2008”.

(vi)          The following definitions are added to Annex A in the appropriate alphabetical places:

“Amendment No. 3” means Amendment No. 3, dated as of September 29, 2006, to this Agreement.

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“Amendment No. 4” means Amendment No. 4, dated as of December 1, 2006, to this Agreement.

“Exchange Act” has the meaning ascribed to it in the definition of “Change of Control.”

“IPO” means an initial public offering of common Stock by Borrower pursuant to an effective registration statement under the Securities Act of 1933, as amended, as a result of which at least 15% of Borrower’s total issued and outstanding common Stock has been distributed.

“Permitted Group” means any group of investors that is deemed to be a “person” (as that term is used in Section 13(d)(3) of the Exchange Act) by virtue of a Voting Agreement or any similar agreement, as the same may be amended, modified or supplemented from time to time; provided, however, that no single Person (other than Odyssey Investment Partners and its Related Parties) beneficially owns (together with its Affiliates) more of the voting power of the issued and outstanding shares of Stock of Borrower,  having the right to vote for the election of directors of Borrower under ordinary circumstances, that is beneficially owned by such group of investors than is then collectively beneficially owned by Odyssey Investment Partners and its Related Parties in the aggregate.

“Related Party” means:

(1)           any controlling stockholder, 50% (or more) owned Subsidiary, or immediate family member (in the case of an individual) of Odyssey Investment Partners; or

(2)           any trust, corporation, partnership, limited liability company or other entity, the beneficiaries, stockholders, partners, members, owners or Persons beneficially holding a 50% or more controlling interest of which consist of Odyssey Investment Partners and/or such other Persons referred to in the immediately preceding clause (1).

“Voting Agreement”  means any voting trust or similar agreement among current and/or former members of the management of Borrower and Odyssey Investment Partners and/or one or more of its Related Parties pursuant to which such current and/or former members of management grant Odyssey Investment Partners and/or its Related Parties the right to vote shares of Borrower’s Stock.