Perspective Chapter: Prefabricated Building Envelope Modular Assemblies for Secure Facilities

Abstract

Mid-rise and high-rise urban jails are subject to complex performance requirements at the building envelope. This case study examines the design of dual envelope systems—a unitized curtain wall system and a modular steel cell secure perimeter system—for thermal performance and security, emphasizing compliance with the New York City Energy Conservation Code (NYCECC) and ASTM F33 standards. These systems are designed through a design-build, design-assist collaboration with separate subcontractors under contract to the design-builder. Key considerations include the location, spacing, form, and dimensions of structural columns, spandrel beams, or intermediate hollow structural steel supports, and the overall size of unitized curtain wall elements. Additional factors range from the sequence of trades to fire-stopping. The well-being of persons in custody is a primary focus, as the design team aims to create normative environments. Prefabrication plays a crucial role in achieving project objectives. The case study delves into design considerations, the design process, and explores an alternative system approach and its implications.