Visual
Inspection
Systematic surface condition assessment — the critical first step in any structural evaluation program.
Systematic Surface
Condition Mapping
Visual inspection is the fundamental baseline of any concrete condition assessment. Conducted by experienced geotechnical and structural professionals, it provides a systematic, documented record of all visible surface defects — from hairline crazing to advanced delamination and section loss.
The visual inspection report drives the scope of all subsequent non-destructive testing. Defect locations, severity ratings and recommended investigation zones are mapped onto structure drawings and delivered as a georeferenced condition register.
Visual inspection is performed prior to all intrusive or non-intrusive testing — ensuring survey resources are directed to where they add the greatest diagnostic value.
Crack Mapping &
Severity Grading
Cracks are catalogued by type, width, length, pattern and probable cause. Each crack class carries different structural implications — a map-cracked surface from plastic shrinkage is categorically different from radial cracks around rebar at cover depth indicating active corrosion expansion.
| Category | Width | Action |
|---|---|---|
| Hairline | < 0.1 mm | Monitor |
| Fine | 0.1 – 0.3 mm | Record & Review |
| Medium | 0.3 – 1.0 mm | Investigate |
| Wide | > 1.0 mm | Immediate Action |
Element
Condition Register
Each structural element is assessed against a standardised condition scale, enabling consistent comparison across elements, structures and inspection cycles.