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Item 11. Description of Registrant’s Securities to be Registered

     Item 11 of Form 10 filed by Chaparral Steel Company (the “Company”) on May 6, 2005, as amended on June 10, 2005, June 27, 2005, July 8, 2005, July 20, 2005, and July 21, 2005, relating to Preferred Stock Purchase Rights is hereby amended to provide:

     On July 10, 2007, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Gerdau Ameristeel Corporation, a Canadian corporation (“Parent”), GVC, Inc., a Delaware corporation and an indirect wholly owned subsidiary of Parent (“Merger Sub”), and for certain purposes, Gerdau, S.A., a Brazilian corporation. Pursuant to the terms of the Merger Agreement, Merger Sub will merge with and into the Company, and as a result the Company will continue as the surviving corporation and a wholly owned subsidiary of Parent (the “Merger”). In connection with the Merger Agreement and the transactions contemplated thereby, the Board of Directors of the Company authorized an amendment to the Rights Agreement, dated as of July 29, 2005 (the “Rights Agreement”), by and between the Company and Mellon Investor Services LLC (“Mellon”), as Rights Agent.

     On July 10, 2005, the Company and Mellon executed the First Amendment (“Amendment No. 1”) to the Rights Agreement. Capitalized terms used below but not defined herein shall have the meanings assigned thereto in the Rights Agreement. Amendment No. 1 provides that (i) no Person shall be deemed to be an Acquiring Person solely by virtue of the execution, delivery or performance of the Merger Agreement or the transactions contemplated thereby, (ii) no Distribution Date shall be deemed to have occurred solely by virtue of the execution, delivery or performance of the Merger Agreement or the transactions contemplated thereby, and (iii) the Final Expiration Date shall be the earlier of (x) the Close of Business on July 29, 2015 and (y) immediately prior to the Effective Time (as defined in the Merger Agreement).

     The Rights Agreement is filed as Exhibit 4.1 to the Current Report on Form 8-K, filed with the Securities and Exchange Commission (the “Commission”) on July 21, 2005, and is incorporated herein by reference. Amendment No. 1 is filed as Exhibit 4.1 to the Current Report on Form 8-K, filed with the Commission on July 12, 2007, and is incorporated herein by reference. The foregoing descriptions of the Rights Agreement and Amendment No. 1 do not purport to be complete and are qualified in their entirety by reference to such exhibits.

Item 15. Financial Statements and Exhibits

(b) Exhibits The following documents are filed as exhibits hereto:

Exhibit No.		Exhibit Description
4.1		First Amendment, dated as of July 10, 2007, to the Rights Agreement, dated as of July 29, 2005, by
		and between Chaparral Steel Company and Mellon Investor Services LLC, as Rights Agent (Incorporated
		by reference to Exhibit 4.1 to the Chaparral Steel Company Current Report on Form 8-K dated July 12, 2007).

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SIGNATURES

     Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this amendment no. 6 to the registration statement to be signed on its behalf by the undersigned, thereunto duly authorized.

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EXHIBIT INDEX

Exhibit No.		Exhibit Description
4.1		First Amendment, dated as of July 10, 2007, to the Rights Agreement, dated as of July 29, 2005, by and
		between Chaparral Steel Company and Mellon Investor Services LLC, as Rights Agent (Incorporated by
		reference to Exhibit 4.1 to the Chaparral Steel Company Current Report on Form 8-K dated July 12, 2007).

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