As-Built Documentation Guide
Understanding the importance and best practices of accurate as-built documentation.
What Are As-Builts?
As-built documentation records the actual constructed conditions of a building or facility, including any deviations from original design drawings. Accurate as-builts are essential for maintenance, renovations, and facility management.
Why As-Builts Matter
Accurate as-built documentation provides significant value.
- Enable informed renovation design
- Reduce RFIs and change orders
- Support maintenance and repairs
- Meet regulatory requirements
- Facilitate space planning
- Document for insurance/legal purposes
Traditional vs Modern Methods
Traditional as-builts relied on field measurements and redlined drawings—often inaccurate and incomplete. Modern 3D scanning creates comprehensive, millimeter-accurate documentation in a fraction of the time.
Scanning for As-Builts
Laser scanning has become the gold standard for as-built documentation. A typical project involves scanning all spaces, registering data into a unified model, and producing deliverables (point cloud, BIM, CAD) as needed.
Best Practices
For optimal as-built documentation results:
- Scan after construction completion, before occupancy
- Include all accessible spaces
- Document above ceilings and behind panels
- Capture MEP systems before concealment
- Integrate with facility management systems
- Update as changes occur
Key Takeaways
Accurate as-builts prevent costly surprises during renovations
3D scanning provides comprehensive, accurate documentation
Best captured after construction, before occupancy
Living documents should be updated with changes
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