Since 1925, when Circle A Company began building wood folding doors for classroom and churches, Modernfold has come to be recognized as the leader in the design, manufacture and service of operable walls and accordion partitions

• See also:
• Masterformat 2004
• 08 30 00 - SPECIALTY DOORS AND FRAMES
• 08 35 00 - Folding Doors and Grilles
• 08 35 13 - Folding Doors
• 08 35 16 - Folding Grilles
• 10 22 26 - Operable Partitions
• Masterformat 1995
• 08300 - Specialty Doors
• 08350 - Folding Doors and Grilles
• 10650 - Operable Partitions
• 10651 - Folding Panel Partitions
• 10652 - Accordion Folding Partitions