Currently in Revit, only certain elements such as walls can be defined as Room Bounding to delimit rooms. However, in many architectural situations, railings (guardrails) function as the effective boundary of a space, particularly in mezzanines, atriums, circulation voids, terraces, balconies, or open stair landings. Because railings cannot currently be defined as room boundaries, users must create workarounds such as room separation lines. These solutions add unnecessary elements to the model, complicate model management, and can lead to coordination issues. This proposal is to add an optional “Room Bounding” checkbox to the Railing element, similar to the existing parameter available for walls and other bounding elements. When enabled, the railing would be recognized by the room calculation engine as a valid boundary for rooms and spaces. Benefits: Reduces the need for artificial modeling elements (separation lines). Improves model clarity and BIM data integrity. Better reflects real architectural conditions where guardrails define spatial limits. Simplifies workflows for architects and space planning. This feature would be particularly valuable in projects involving multi-level open spaces, mezzanines, balconies, and circulation voids, where railings often define the perceived boundary of a room without being a full wall.
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