Form 12 & Form 15 Certification
RPEQ-Certified Compliance Documentation for Existing Structures
Form 15 and Form 12 certification is the mechanism by which a Registered Professional Engineer of Queensland (RPEQ) certifies that a structure meets relevant performance requirements under Queensland building legislation. TRSC provides both, and in both cases, certification is underpinned by investigation and analysis, not desktop assumption or professional opinion unsupported by evidence.
Form 15 is the RPEQ Structural Adequacy Certificate required under the Queensland Building Regulations 2021 for structural design or assessment matters. TRSC issues Form 15 certificates only after completing sufficient investigation and analysis to genuinely support the certification. An RPEQ who certifies structural adequacy without adequate investigation carries personal professional liability for that certification, our investigation-first approach protects both our clients and our engineers.
Form 12 relates to building classification and code compliance. TRSC provides technical input to building certifiers on existing buildings where compliance with the National Construction Code (NCC) requires engineering input. This is particularly relevant for change-of-use projects, adaptive reuse of heritage buildings, and assessments under the existing building pathway of the NCC's Performance Solution framework.
TRSC provides certification across a range of existing building scenarios: post-disaster re-occupancy, heritage building assessment, design life extension, remediation completion, change of use, and recertification where previous certification is expired or disputed. Every certification is supported by a complete investigation file that documents the technical basis, maintained by TRSC and available for regulatory review.
Speak with an RPEQ-qualified structural engineer about this service.
Capabilities
Form 15 RPEQ Structural Adequacy Certification
Issue of RPEQ Form 15 certificates for structural design assessment, construction compliance, and existing building adequacy. Each certificate is supported by documented investigation and analysis.
Form 12 Technical Documentation
Preparation of structural engineering documentation for building certifiers undertaking Form 12 classification decisions on existing buildings. Includes performance solution engineering evidence reports.
Performance-Based Compliance Assessment
Engineering assessment of existing buildings against NCC performance requirements under the existing building and Performance Solution pathways. Particularly relevant for heritage buildings and aged assets that do not comply with prescriptive deemed-to-satisfy provisions.
Heritage Building Certification
Structural adequacy certification for Queensland Heritage Register and local heritage register properties. TRSC holds experience across heritage property types and can certify adequacy where standard methods are not applicable.
Post-Disaster Re-Occupancy Certification
RPEQ certification confirming structural safety for re-occupancy following disaster events. Issued following physical inspection and structural assessment. Conditions attached where partial re-occupancy is appropriate.
Design Life Extension Certification
Engineering assessment and certification confirming that an existing asset can safely continue in service beyond its original design life. Supported by condition data, residual capacity analysis, and maintenance requirements.
Compliance Recertification for Aged Assets
Recertification of aged assets where original certification is expired, disputed, or not available. Involves investigation to establish current structural condition and capacity as the basis for a fresh certification.
Coordination with Building Certifiers
Direct liaison with private and local government building certifiers on matters requiring structural engineering input. TRSC provides engineering evidence in the format required by the certification process.
Frequently Asked Questions
What is Form 15 certification?
Form 15 is the RPEQ Structural Adequacy Certificate under the Queensland Building Regulations 2021. It is a formal declaration by a Registered Professional Engineer of Queensland that a structure, structural element, or structural design meets the relevant performance requirements. Form 15 is required by building certifiers for many development approvals, building works approvals, and existing building compliance matters in Queensland.
When is Form 15 required?
Form 15 is required in Queensland for: structural aspects of development approvals; building works involving structural elements; assessment of existing buildings for change of use; post-disaster re-occupancy certification; and other circumstances where a building certifier requires engineering certification of structural adequacy. The specific trigger requirements are set out in the Queensland Building Regulations 2021 and the NCC. If you are unsure whether your project requires a Form 15, contact TRSC for a preliminary assessment.
What is the difference between Form 12 and Form 15?
Form 12 is issued by a building certifier (not an engineer) and relates to classification and compliance with the NCC/BCA. Form 15 is issued by an RPEQ and relates specifically to structural adequacy. In practice, a building certifier may require a Form 15 from an RPEQ engineer before they can issue a Form 12. TRSC provides the Form 15 structural engineering certification; the building certifier uses it as input to their Form 12 compliance determination.
Does TRSC issue Form 15 without investigation?
No. TRSC does not issue Form 15 certificates based on desktop review, previous reports, or professional opinion unsupported by current investigation data. Every Form 15 we issue is backed by a documented investigation file covering the information we relied on to form the structural adequacy opinion. This approach protects our clients, who need certification that will withstand regulatory and legal scrutiny, and our engineers, who carry personal professional liability for every certificate they sign.
Who can issue Form 15 in Queensland?
Only a Registered Professional Engineer of Queensland (RPEQ) in the relevant engineering discipline can issue Form 15 under the Professional Engineers Act 2002 (Qld). For structural matters, the engineer must hold RPEQ registration in structural engineering. TRSC engineers hold RPEQ registration in Queensland, and our principal engineer also holds equivalent registration in NSW and Victoria for projects in those jurisdictions.
Book a consultation for Form 12 & Form 15 Certification
Every engagement begins with a direct conversation with an RPEQ-qualified structural engineer. No sales intermediary, contact TRSC to discuss your asset and the scope of work required.
Other Services
All servicesStructural Investigation
Evidence-Based Assessment of Existing Asset Capacity
Learn more →Condition Assessment & Survey
Structural Condition Survey, Dilapidation Reports & Remaining Capacity Evaluation
Learn more →Structural Restoration & Remediation Design
Evidence-Based Structural Restoration, Repair & Strengthening for Existing Assets
Learn more →