DISC Emergency Power Facility & Roof Hardening, Florida. The project includes a 4,400 SF generator building and a complete as-built survey of the existing DISC facility structural conditions and the development of schemes for hardening and strengthening the main structure, roof, and exterior walls. The new generator building structure includes tilt-up concrete walls, concrete foundations, steel joists and concrete topped composite metal deck designed for a 190 mph wind velocity and a large missile impact force of 6,000 lbs.