Forensic Structural Investigation
Significant structural damage, recurring defects or unusual building behaviour often requires more than documenting what is visible.
Ostanes Engineering investigates the available evidence to understand how a structural problem developed, assess probable failure mechanisms and provide engineering findings with practical recommendations for the next stage.
Investigating Why a Structural Problem Occurred
A forensic structural investigation moves beyond recording symptoms to assess likely causes, failure mechanisms and load-path issues using physical evidence and documentation review. Calculations, monitoring or specialist testing are agreed where the investigation needs them.
Structural Failure & Collapse
Investigating partial or complete structural collapses, shear failures, timber fractures, and beam buckling under load.
Foundation Subsidence & Heave
Diagnosing complex geotechnical interactions, moisture-induced slab heave, tree root extraction, and deep soil settlement (AS 2870).
Beams, Columns & Load Paths
Evaluating overloaded lintels, steel column buckling, missing lateral restraint, and unengineered structural wall removals.
Connection Distress & Failure
Analysing sheared bolts, weld fatigue, torn tie-down straps, and failed truss gang-nail connector plates.
Retaining Wall Rotation & Failure
Investigating hydrostatic pressure overload, missing drainage, footing rotation, and post bending in earth-retaining systems.
Material Deterioration & Corrosion
Assessing structural concrete spalling, carbonation, severe steel corrosion, and fungal rot compromising load capacity.
When Is a Forensic Structural Investigation Appropriate?
Structural Problem Keeps Returning
Cracking or distortion that reopens repeatedly after repairs indicates an unaddressed root-cause mechanism requiring deep analysis.
Unclear Cause of Significant Damage
When multiple competing hypotheses exist for building movement, requiring engineering assessment against the available physical evidence.
A Load-Bearing Element Failed
Sudden or progressive failure of a beam, column, footing, or retaining wall requiring formal causation analysis.
Disputed Construction Defects
Disagreements between builders, owners, and developers regarding non-compliant engineering or substandard construction practices.
Conflicting Engineering Reports
Systematic technical review when competing expert or insurance reports arrive at contradictory structural conclusions.
Tribunal & Dispute Support
Independent, objective RPEQ technical evidence for dispute resolution, insurance litigation, and QCAT proceedings.
Our Forensic Structural Investigation Process
1. Technical Question Definition
We review available architectural/structural drawings, construction logs, repair records, and previous reports to define key questions.
2. Forensic Site Investigation
An RPEQ structural engineer conducts detailed physical examinations, taking measurements and crack mapping. Specialist or non-destructive testing is added only where agreed.
3. Failure Analysis & Report
We evaluate competing failure hypotheses against physical laws and deliver a forensic engineering report setting out our conclusions and their limits, based on the available evidence.
Areas We Serve
Ostanes delivers expert structural engineering inspections and comprehensive engineering reports across Southeast and regional Queensland. Our engineers account for reactive clay soils (AS 2870), sloping terrain settlement, timber-framing condition (AS 1684 concerns timber-framed construction; pest inspections are separate), and building code compliance across the state. We provide dedicated property inspection services across all major metropolitan and regional areas, including:
Related Structural Inspection Services
Engineer-led pre-purchase structural inspections of cracks, movement, foundations and unapproved renovations before you commit.
Engineering investigation into wall cracks, slab subsidence, and foundation movement with repair recommendations.
Expert assessment of roof truss deflection, modified rafters, solar panel loads, and cyclone tie-downs.
Pre-construction baseline photographic records of neighbouring buildings, driveways, and council infrastructure.
Independent storm, impact, flood, and fire structural assessments for insurance claim scopes.
Engineering repair design, underpinning drawings, beam sizing, and RPEQ Form 15 certifications.
Looking for comprehensive defect assessments or forensic reporting? Explore our full Structural Inspection & Forensic Engineering Services →
What Clients Say
After the Report Lands
Forensic Structural Investigation FAQs
It is an in-depth engineering investigation into the root cause and failure mechanism behind structural collapse, severe defects, recurring damage, or disputed building movements.
A standard inspection records visible defects and severity. A forensic investigation assesses competing hypotheses against the evidence, with calculations where agreed, to establish the most probable cause of the failure.
Yes, where physical evidence and documentation allow. Our reports clearly separate physical observations, engineering interpretation, and technical conclusions.
Original structural/architectural drawings, geotechnical soil reports, historical photos of the damage progression, previous engineering reports, and repair records.
Most investigations start non-invasively. Where critical structural elements are concealed behind linings, targeted openings or specialist testing may be recommended.
Yes. Our RPEQ engineers provide independent, objective technical evidence suitable for dispute resolution, insurance negotiations, and legal proceedings.
We provide actionable remediation guidance, identifying whether monitoring, geotechnical intervention, or remedial structural design is needed.
Yes. Once causation is established, our design team can prepare remedial engineering drawings, underpinning plans, and Form 15 certifications.
Discuss Your Forensic Structural Investigation
Provide a description of the structural failure, photographs of the damage, and any available drawings or previous reports. Our RPEQ engineers will review your matter.
- Phone: 0411 631 777
- Email:
- Service Coverage: Queensland-wide
