Founded in 1983, the Company manufactures clear-span, metal-framed tension fabric buildings (Clamshelters®) for sale as pre-engineered building "kits" that are available in a large number of standard sizes

• See also:
• Masterformat 2004
• 13 31 00 - Fabric Structures
• 13 31 23 - Tensioned Fabric Structures
• 13 34 00 - Fabricated Engineered Structures
• 13 34 13 - Glazed Structures
• 13 34 16 - Grandstands and Bleachers
• 13 34 19 - Metal Building Systems
• 13 34 23 - Fabricated Structures
• 13 34 56 - Observatories
• 13 44 00 - Modular Mezzanines
• Masterformat 1995
• 13120 - Pre-Engineered Structures
• 13124 - Portable & Mobile Buildings