• ABT, Inc.

• Armtec Construction Products Inc.

• BEP Bestobell Inc.

• Big 'O' Inc.

• Canada Culvert & Metal Products Ltd.

• HUNT Manufacturing Ltd.

• Hy-Grade Precast Concrete

• I F Industries Inc.

• Inland Concrete Ltd.

• Mueller Canada Inc.

• Northwest Culvert

• Ohio Concrete

• Prinsco Inc.

• Propak Systems Ltd.

• Westering Design

• YHR Partners, Ltd.