Fabrication-Aware Generative Design for Hybrid Prefabrication Using Stable Diffusion Xl

Abstract: Existing generative design approaches for floorplan generation rarely incorporate fabrication constraints, limiting their applicability in industrialized construction. This study presents a fabrication-aware generative design framework for hybrid prefabrication based on Stable Diffusion XL. The framework integrates spatial, functional, and manufacturing constraints to balance design flexibility and production efficiency. A two-stage training strategy generates both conceptual layouts and module-integrated solutions. Experiments demonstrate the generation of boundary-compliant layouts and standardized module allocation under diverse boundary conditions and text-based requirements. An interactive workflow supports convergence from conceptual designs to fabrication-aligned solutions, bridging early-stage architectural intent with downstream fabrication requirements.