Structural Design of Lightweight Architecture

Abstract Lightweight architecture, like large‐scale enclosures, ETFE membrane roofs, and transparent façades, presents unique challenges and opportunities at the intersection of architecture and structural engineering. Unlike conventional building processes that follow a linear sequence from architect to general contractor to specialty firms and, finally, to engineers, lightweight structures demand a fundamentally different workflow. Their success relies on an iterative, interdisciplinary design culture that integrates engineering knowledge with architectural vision from the earliest stages of a project. The first case study, the Culture Shed in New York City, illustrates the integration of architectural intent and structural logic in a transformable, kinetic building envelope. The project demonstrates how the performance demands of movable lightweight systems necessitated joint development of conceptual models, detailed analysis, and fabrication strategies. A second case study, a large‐scale glass fin wall in Chicago, underscores the importance of coordination in realizing ultratransparent, slender façades. Here, iterative collaboration among architects, engineers, and fabricators ensured structural feasibility while preserving the architectural ambition of maximum transparency. These examples reveal recurring patterns: the breakdown of disciplinary silos, the need for shared digital modeling environments, and the translation of conceptual form into precise engineering detail. They also highlight the decisive role of construction methodology in shaping design outcomes, from tender documentation through installation planning. By drawing lessons from these projects, the paper proposes an expanded design methodology tailored to lightweight architecture: one that is integrated, dialogic, and responsive to material and construction constraints. Such a methodology does not merely adapt conventional processes to unconventional structures but redefines how architecture and engineering converge in the design of innovative, resource‐efficient, and visually striking enclosures.