• Crumpler Plastic Pipe

• DeZURIK/Copes-Vulcan - Canada

• Deeter Foundry

• Delta Companies

• EJ

• Ecco Heating Products Ltd.

• Elastizell Corporation of America

• F. P. Smith Wire Cloth Co.

• Gesell Concrete Products

• Granite Construction Co of Utah

• Haida Forest Products Limited

• Hancor

• Hardy Holzman Pfeiffer Associates

• Henry: E. P. Henry Corp.

• IPSCO Inc.

• Infiltrator Systems Inc.

• Inland Concrete Ltd.

• J & J Drainage Products Co.

• J.L. Turner Co.

• JDR Enterprises

• JM Eagle

• Jensen Precast

• Josam Co.

• Kistner Concrete Products Inc.

• L.M. Scofield Co.

• Lakelands Concrete Products, Inc.