Profile: Vault Structures, Inc. manufactures security equipment for the security industry. Our produce line includes lightweight modular vaults, concrete modular vaults, vault doors, plate safes and safe deposit boxes. Our VSI 1000 is an overhead delivery system utilizing a 4 1/2" pneumatic tube system and a free carrier system. Our TL-15 safes include special VSI locking configurations, adjustable or fixed shelves, decorative panels, depository configurations and special interiors.