Standard

BIM Modeling Standards

Revit project setup, modeling tolerances, discipline breakdown, worksets, and warning management for scan-to-BIM production.

Last updated: Jun 2026

1. Software & Project Setup

Model in the Revit version specified by the client; never upgrade a client-provided model without approval.
Start from the approved ScanLogiq template with standard views, browser organization, and title blocks.
Acquire shared coordinates from the registered point cloud; do not relocate the model afterward.
Establish levels and grids from the point cloud before modeling any elements.

Model geometry to match the registered point cloud within the tolerance for the contracted LOD.

LOD	Model-to-cloud tolerance	Notes
200	± 25 mm	Approximate size, shape, location
300	± 12 mm	Accurate size and location from cloud
350	± 6 mm	Includes interfaces and connections
400	± 3 mm	Fabrication-level detail where contracted

Architectural: walls, floors, ceilings, doors, windows, vertical circulation, fixed casework.
Structural: columns, beams, slabs, foundations, bracing visible in the cloud.
MEP: ductwork, piping, conduit ≥ contracted diameter, equipment, fixtures, and terminals.
Model each discipline in its own linked file unless a single federated model is requested.

Use standard worksets by discipline and link management; keep the point cloud on its own workset.
Prefer standard system and loadable families; document any custom families.
Resolve Revit warnings continuously — target zero critical warnings at delivery.
Purge unused families and run a model audit before each milestone.

Every modeled element must be justified by point-cloud evidence or documented field notes. Do not model assumptions without flagging them.

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