Simpson Manufacturing Co., Inc. To Present at Morgan Keegan Investor Conference

PLEASANTON, Calif., Aug. 30 /PRNewswire-FirstCall/ — Simpson Manufacturing Co., Inc. (the “Company”) announced today that its Chairman, Barclay Simpson, will present at the Morgan Keegan investor conference at the Peabody Hotel in Memphis, TN, on Thursday, September 6, 2007. The presentation is scheduled for 4:15 pm, central daylight time. A live and archived webcast of the conference presentation will be available at http://www.wsw.com/webcast/mk15/ssd/ or through a link on the Company’s website at http://www.simpsonmfg.com/.

Simpson Manufacturing Co., Inc., headquartered in Pleasanton, California, through its subsidiary, Simpson Strong-Tie Company Inc., designs, engineers and is a leading manufacturer of wood-to-wood, wood-to-concrete and wood-to-masonry connectors and fastening systems and pre-fabricated shearwalls. Simpson Strong-Tie also offers a full line of adhesives, mechanical anchors and powder actuated tools for concrete, masonry and steel. The Company’s other subsidiary, Simpson Dura-Vent Company, Inc., designs, engineers and manufactures venting systems for gas and wood burning appliances. The Company’s common stock trades on the New York Stock Exchange under the symbol “SSD.”

For further information, contact Barclay Simpson at (925) 560-9032.

Simpson Manufacturing Co., Inc.

CONTACT: Barclay Simpson of Simpson Manufacturing Co., Inc.,+1-925-560-9032

Web site: http://www.simpsonmfg.com/