FSC 5410 (Federal Supply Class Code for Prefabricated Modular Buildings) FSC 5410 is the formal Federal Supply Class used by the United States government to categorize, procure, and manage prefabricated and modular building systems. This classification plays a critical role in defense, humanitarian, emergency management, and federal infrastructure programs by standardizing how relocatable and permanent modular structures are specified, sourced, and deployed. For suppliers, EPC contractors, and modular manufacturers, FSC 5410 is not simply an administrative label. It is a gateway into federal procurement ecosystems where compliance, performance, and logistics readiness determine eligibility and long-term credibility. What is FSC more..