Extended master connection file (χMCF). Description of mechanical connections and joints in structural systems

This technical specification outlines a standardized format for expanding master connection files within engineering contexts, specifically designed to describe mechanical connections and structural nodes. Developed to enhance interoperability across design and manufacturing workflows, it provides a structured approach for documenting complex joint behaviors in building systems. The document establishes clear data requirements and file structures that facilitate the exchange of information between various software platforms used in construction and engineering projects. By defining a consistent methodology for representing connection properties, it supports more efficient collaboration among professionals involved in structural analysis and fabrication. The framework allows for the precise description of load paths, boundary conditions, and geometric configurations associated with node assemblies. Its implementation aims to reduce errors during data transfer and ensure that critical connection details are accurately preserved throughout the project lifecycle. This resource serves as a guide for developing digital twins and BIM models by providing a reliable foundation for capturing mechanical linkage characteristics in complex structures.