A forensic structural assessment was performed following an industrial deflagration event to evaluate the condition of the existing roof structure and determine the extent of structural damage. The objective of the investigation was to assess the structural framing, identify any damage resulting from the incident, and provide engineering recommendations regarding repair and continued service.
The roof structure consisted primarily of open web steel joists supporting a steel roof deck. Following the event, concerns were raised regarding possible permanent deformation, overstressing of structural members, and the overall integrity of the roof system.
Engineering Challenge
Unlike conventional gravity loads, a deflagration produces a rapid pressure wave that can subject structural members to short-duration forces they were not originally designed to resist. Even when visible damage appears limited, localized yielding, distortion, or hidden structural damage may exist.
A detailed engineering assessment was therefore required to distinguish cosmetic damage from structural damage and determine whether the roof framing remained suitable for continued service.
Engineering Investigation
The forensic investigation included:
- Detailed visual inspection of the roof framing and supporting structure.
- Documentation and mapping of observed structural damage.
- Assessment of open web steel joists, steel roof deck, connections, and supporting members.
- Evaluation of permanent deformation and member distress.
- Review of the structural load path and the effects of the overpressure event.
- Engineering assessment of the structural adequacy of the affected framing.
- Development of practical repair and remedial recommendations where required.
Outcome
Based on the site investigation and engineering assessment, the condition of the structural framing was evaluated and recommendations were provided regarding repair, strengthening, and continued serviceability of the affected areas.
The investigation provided the information required to assess the extent of structural damage, prioritize repairs, and support informed engineering decisions based on the observed condition of the structure.
Services Provided
- Forensic structural investigation
- Structural damage assessment
- Open web steel joist evaluation
- Industrial structural engineering
- Remedial engineering recommendations
- Engineering report and documentation
