• Cascade Coil Drapery, Inc.

• Cascade Mfg. Co.

• Ceilings Plus

• Century Painting, LLC

• Century Steel Erectors Co.

• Champion Elevators, Inc.

• Chenevert-Songy-Rodi-Soderberg

• Chester Pool Systems, Inc.

• Claydon Architectural Metalwork

• Cleveland Steel Specialty Company

• Cobb fabricating

• Coble Metal Works

• Cole Hersee

• Comfort Supply Inc.

• Conner Industries, Inc.

• Cooper B-Line Systems

• Corbin Russwin Architectural Hardware

• Cornelius Architectural Products

• Coronet Chandelier Originals

• Couturier Iron Craft, Inc.

• Crafton, Tull & Associates, Inc.

• CraneVeyor Corp.

• Creative Edge Master Shop

• Creative Forge

• Creative Metal Industries Inc.

• Creative Metal Works, Inc.