It would be extremely helpful to introduce the concept of Reference Levels in Archicad — similar to Revit’s Levels — which are non-structural, non-story markers used to define key vertical positions in a model (e.g. ceiling heights, parapets, window datum lines, etc.).
These levels would not function as actual stories, and would not be exported as separate floors in IFC, but would provide a consistent and visible reference for modeling and coordination.
Proposed Implementation:
Optional extras:
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Reference Levels could be grouped (e.g., Ceiling Levels, Façade Datums)
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Could be color-coded or styled differently from real stories
Why This Is Important:
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Improved Coordination: Ceiling levels, bulkhead lines, parapet heights, etc., can be defined and referenced clearly, without cluttering the Story structure or requiring dummy stories.
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Cleaner IFC Export: No need for fake stories that confuse consultants or clash with structural models.
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More Accurate Modeling: Allows modeling elements like walls, ceilings, and beams in relation to a defined height, not just the nearest story or manual height input.
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Industry-Standard Workflow: This aligns with how many multidisciplinary teams work — especially when integrating with Revit-based consultants.
Example Use Case:
In a commercial building:
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Ground Floor is at 0.00
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Ceiling RL at +3.200
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Bulkhead RL at +2.600
These are critical modeling guides, but don't warrant actual stories. Currently, workarounds like 2D lines or fake stories are used, which are not robust or parametric.
Open