Radius Engineering International - C-105

As the model number implies, the C-105 is engineered by Radius Engineering International to accommodate up to 105 people. It is classified as a large-capacity community shelter rather than a small, single-family unit. The design includes dedicated floor plans for sleeping, sanitation, and food storage to support that specific population.

The C-105 is constructed from high-quality fiberglass, which forms a monolithic, waterproof underground shell. Fiberglass is specifically chosen because it does not rust, corrode, or require the extensive structural maintenance that steel or concrete shelters might need over time. This composite structure provides exceptional structural integrity against ground shock.

The C-105 is engineered to protect communities from catastrophic events, including nuclear fallout, chemical and biological threats, and severe natural disasters like tornadoes. It functions as a self-contained life-support system designed for extended underground habitation. The shelter includes integrated air filtration systems capable of removing dangerous nuclear, biological, and chemical agents.

Installation requires excavating a sufficiently large hole to accommodate the massive fiberglass structure, which is then buried underground to provide an earth arch for physical protection. The heavy installation process requires heavy machinery, such as cranes, to lower the shelter modules safely into place. Radius Engineering typically oversees or provides detailed consultation for the critical life-support hookups during the installation process.