Chaparral Steel Company and Gerdau Ameristeel Corporation Announce Expiration of Hart-Scott-Rodino Waiting Period


MIDLOTHIAN, TX, and TAMPA, FL, Aug. 23 / -- Chaparral Steel Company (NASDAQ:CHAP) and Gerdau Ameristeel Corporation (NYSE:GNA)(NYSE: TSX:)(NYSE:GNA) today announced that the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended ("HSR"), in connection with the Agreement and Plan of Merger signed by Chaparral, Gerdau Ameristeel and certain other parties, expired at 11:59 p.m. (Eastern Time) on August 22, 2007 without action by either the Federal Trade Commission or the Department of Justice. Expiration of the HSR waiting period without action by such regulators is a condition to completion of the proposed merger. The consummation of the merger remains subject to other customary conditions, including adoption of the Agreement and Plan of Merger by Chaparral's stockholders.

About Chaparral
Chaparral Steel Company, headquartered in Midlothian, Texas, is the second largest producer of structural steel beams in North America. Chaparral is also a supplier of steel bar products. In addition, Chaparral is a leading North American recycling company. Additional information may be found on Chaparral's web site at www.chapusa.com.

For further information contact Cary D. Baetz at (972) 779-1032.

About Gerdau Ameristeel
Gerdau Ameristeel is the second largest mini-mill steel producer in North America with annual manufacturing capacity of over 9.0 million tons of mill finished steel products. Through its vertically integrated network of 17 mini-mills (including one 50% owned joint venture mini-mill), 17 scrap recycling facilities and 52 downstream operations, Gerdau Ameristeel serves customers throughout North America. The company's products are generally sold to steel service centers, steel fabricators, or directly to original equipment manufactures for use in a variety of industries, including construction, cellular and electrical transmission, automotive, mining and equipment manufacturing. The common shares of Gerdau Ameristeel are traded on the New York Exchange and the Toronto Stock Exchange under the symbol GNA.

For further information, contact Barbara R. Smith at (813) 319-4324.

Additional Information and Where to Find It
In connection with the proposed transaction with Gerdau Ameristeel Corporation, Chaparral filed a definitive proxy statement with the Securities and Exchange Commission on Schedule 14A on August 10, 2007. INVESTORS AND SECURITY HOLDERS ARE STRONGLY ADVISED TO READ THE PROXY STATEMENT, BECAUSE IT CONTAINS IMPORTANT INFORMATION. Investors and security holders may obtain a free copy of the proxy statement and other documents filed by the Company at the Securities and Exchange Commission's Web site at www.sec.gov/. The proxy statement and such other documents may also be obtained free of charge by directing such request to Chaparral Investor Relations, telephone (972) 779-1032 or on Chaparral's web site at www.chapusa.com.

Participants in the Solicitation
Chaparral and its directors, executive officers and certain other members of its management and employees may be deemed to be participants in the solicitation of proxies from its stockholders in connection with the proposed transaction. Information regarding the interests of such directors and executive officers and information concerning all of Chaparral's participants in the solicitation are included in the proxy statement. The proxy statement is available free of charge at the Securities and Exchange Commission's Web Site at www.sec.gov/ and from Chaparral Investor Relations, telephone (972) 779-1032 or on Chaparral's web site at www.chapusa.com.

Source: Gerdau Ameristeel Corporation

CONTACT:Cary D. Baetz at (972) 779-1032; Barbara R. Smith at (813)
319-4324

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