What is Scan-to-BIM?
How 3D scan data transforms into intelligent BIM models for architecture, engineering, and construction.
Definition
Scan-to-BIM is the process of converting 3D laser scan data (point clouds) into intelligent Building Information Models (BIM). Rather than just geometry, BIM models contain information about building elements—walls know they're walls, doors have hardware specifications, and pipes carry flow data. This makes the model useful for design, construction, and facility management.
The Process
Scan-to-BIM follows a structured workflow from field capture to final model delivery.
- 1. Laser scanning captures existing conditions
- 2. Point cloud registration and cleaning
- 3. Import to Revit or other BIM software
- 4. Manual modeling of building elements
- 5. Quality control and verification
- 6. Delivery in native format (RVT, IFC)
Level of Development (LOD)
LOD defines how much detail goes into the BIM model. LOD 100 is basic massing, LOD 200 includes generic elements, LOD 300 has specific details, LOD 400 is fabrication-ready, and LOD 500 is verified as-built. Higher LOD requires more modeling time and cost but provides more value for coordination and management.
Benefits of Scan-to-BIM
Accurate as-built BIM models prevent costly surprises during renovation and construction. Design teams can coordinate new work with existing conditions. Clash detection identifies conflicts before they become expensive field problems. Facility managers gain a digital asset for ongoing operations.
- Accurate existing conditions for design
- Reduced change orders and RFIs
- Better coordination between trades
- Foundation for facility management
- Historic preservation documentation
Deliverables
Typical Scan-to-BIM deliverables include Revit models (RVT), IFC files for interoperability, 2D drawings exported from the model, and clash reports. Project-specific deliverables may include equipment schedules, area calculations, and coordination models.
Key Takeaways
Scan-to-BIM converts point clouds into intelligent building models
LOD (Level of Development) defines modeling detail and cost
Accurate BIM models prevent costly construction surprises
Common deliverables include Revit files, IFC, and 2D drawings
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