Modern Arch Structures (MAS™) – Imagine a structure that stands up to any natural disaster or fire, costs a fraction of conventional construction, can be built in a week, is 100% green, is extremely energy efficient, and has an exterior structure, including roofing and siding, with an expected life span of hundreds of years with virtually NO maintenance. It is here … it is real … it is MAS™. Modern Arch Structures form cage innovation (Patents Pending) has been used to designed two configurations , the MAS-570™ and the MAS-1300™. These are building blocks that can be used to create projects of any size. With an interior height of 18 feet, the MAS-1300™ is large enough to be configured with a loft. With an interior height of 12 feet, the MAS-570™ is best suited for a single story configuration. Click on one of the categories to the LEFT to learn more.