• Simpson Strong-Tie Co., Inc.

• ADT Security & Fire (Division of Tyco)

• Advanced Support Products, Inc.

• Ai/Washington, DC

• Alltemp Products Company Ltd.

• Alpha Free-Flow Industries Ltd.

• Arco Environments Inc.

• Arcoplast

• Associated Tube Industries Ltd.

• Bon L Canada Inc

• Bow Plumbing Systems

• Brass Craft Canada Ltd.

• Bridges PBT

• Canada Culvert & Metal Products Ltd.

• Canadian Automatic Sprinkler Association

• Canvil Ltd.

• Condux International

• Cooper B-Line Systems

• Diamond Precision Products

• Douglas Brothers Division of Robert Mitchell Inc.

• Dresser Instrument Division

• Ductmate Industries

• ELCO Textron

• ERICO

• Enduro Composites

• Ever Ready Technologies Ltd.

• Farr Associates

• Flex-Hose Co.

• Fryston Canada Inc.

• GERB Vibration Control Systems

• GS Metals Corp.

• Higginson Equipment Sales Ltd.

• Hollaender Mfg. Co.

• Hord Coplan Macht, Inc.

• Hubbard Enterprises

• IDEX Corporation

• Indalex Div of Caradon Ltd.

• J.L. Turner Co.

• Joseph Davis

• Katherine Austin AIA

• Kelly Klosure Systems

• Lancaster Threaded Products

• Light Bulbs Etc.

• MIRO Industries, Inc.

• Mason Industries, Inc.

• Nemato Composites Inc.

• Northern Contours

• PC Associates

• PHD Mfg.

• Piping Technology & Products

• Poltec Industries Ltd.

• Powers Fasteners, Inc.

• Precisioneering Ltd.

• Prudential Steel Ltd.

• RPS Corporation

• Reinforced Plastics Systems Inc.

• RoofTop Accessories

• Sizemore Group

• Spacemaker

• Specialty Forest Products, Inc.

• Stevens & Wilkinson of Georgia, Inc.

• T.A. Caid Industries

• TEK Engineering

• Thaler Metal Industries Inc.

• Thaler Metal Industries Inc.

• Thomas & Betts Electrical

• Threaded Rod Co.

• Tomcat USA

• Tyco Engineered Products & Services

• Ultimate Strength Anchor Systems, LLC

• Unidex

• Unistrut Corp.

• Versabar Corp.

• Waterline Products Company Ltd.

• Westering Design

• doelling brennan peschl inc.