Mistakes before scanning
Poor preparation limits the information that can be collected. The operator needs to know the proposed drilling or cutting area, likely construction and the concealed features of concern.
- 1. Scanning without a defined opening or bore layout
- 2. Ignoring drawings and previous alteration records
- 3. Surveying an area too small to interpret reinforcement patterns
Mistakes during data collection
One-direction passes and inconsistent reference points make anomalies harder to interpret and relocate. Surface obstructions, moisture and congested reinforcement should be recorded rather than silently accepted.
- 4. Collecting data in only one direction
- 5. Failing to mark a stable grid and orientation
- 6. Treating every signal as a confirmed utility
The final mistake: disconnecting scan and execution
7. The cutting or drilling team receives a photograph without a briefing, limitations or site markings. The scan record should be coordinated with the final set-out, and uncertain areas should be escalated before work starts.
Project note
Guidance is the starting point. The site determines the method.
Every structure, access route and operating environment is different. Final engineering, approvals and controls should be based on verified project information and a site-specific assessment.
