Building and Construction Authority Parameters
Singapore's primary building control authority and lead agency for CORENET X implementation
About BCA Requirements
BCA serves as the primary building control authority in Singapore, responsible for ensuring structural safety, construction quality, and universal accessibility compliance across all building works.[1] As the lead agency for CORENET X implementation, BCA reviews structural design calculations, construction methods, and accessibility provisions while coordinating multi-agency responses.
BCA's 294 IFC-SG parameters represent the largest parameter set among all agencies, covering structural elements (beams, columns, slabs, walls, foundations), construction methodology specifications, material grades, reinforcement details, and accessibility provisions under the Code on Accessibility in the Built Environment 2025.[2]
From October 2026, all new projects regardless of GFA must submit via CORENET X with properly populated BCA parameters.[4] BCA's Good Practices Guidebook recommends pre-submission model checks as "crucial quality control" to reduce Written Directions.[2] Industry experience suggests 3-6 months of upfront coordination is needed for Design Gateway preparation.
Key Compliance Areas
Structural Safety & Design
- Structural calculations endorsed by Accredited Checkers (AC) or QP(Geo)
- Foundation systems: piling, pile caps, diaphragm walls with specified pile types
- Superstructure elements: beams, columns, slabs, walls with fire resistance ratings
- Construction methodology: CIS, Precast, Pre-tensioning, Post-tensioning, PPVC
- Reinforcement specifications: steel grades, cage configurations, stirrup types
Accessibility Compliance
- Code on Accessibility in the Built Environment 2025 requirements
- Barrier-free access routes and ramps with maximum gradient specifications
- Accessible lift provisions and vision panels in fire doors
- Sanitary facilities for persons with disabilities
- PWD holding points and tactile guidance indicators
Building Control Process
- Design Gateway, optional Piling Gateway, and Construction Gateway submissions
- Permit to Carry Out Structural Works (PCSW) issuance
- Part Structural (Part ST) submissions for phased construction
- TOP and CSC requirements
Common BCA Compliance Challenges
IFC-SG Parameter Mapping Errors
BCA's automated model checking rejects models with parameter errors before human review. Common issues: misspelled parameters (e.g., "FireRatng" instead of "FireRating"), wrong property set assignment (FireRating in SGPset_Wall instead of Pset_WallCommon), and empty mandatory fields for ConstructionMethod or MaterialGrade.
Incomplete Structural Submission Packages
Rejections due to missing AC-endorsed calculations, site investigation reports in AGS format, or incomplete topography data. Each deficiency triggers a Written Direction requiring resubmission, extending approval timelines by 2-4 weeks per iteration.
Coordination & Federation Issues
Multi-disciplinary coordination failures: geo-referencing misalignment (structural model at different SVY21 coordinates than architectural), level naming inconsistencies ("01-FIRST FLOOR" vs "L1"), and GUID conflicts from Revit model binding that break IFC relationships.
Timeline Pressure & Design Freeze
Industry practice of 2 weeks for AC checking versus BCA's recommended 4 weeks leads to unsafe design identification late in process. Firms allocating 3 months for Design Gateway discover they need 6 months for proper coordination.
Part ST Submission Complexity
Unclear boundaries between Part ST packages (pile cap in piling vs construction package), dependency misunderstandings requiring original Design Gateway approval before Construction Gateway clearance.
Written Directions from Gaps
Receiving Written Directions (WDs) from pres-submission gaps means rework, delays, and cost. BCA's Good Practices Guidebook identifies common causes: missing IFC entity assignments, incomplete property sets, and skipping pre-submission model checks. Third-party tools for IFC+SG preparation are recommended to catch these issues before submission.
BCA Parameter Database
Search and explore all 294 parameters required for Building and Construction Authority submissions.
Frequently Asked Questions about CORENET X for BCA
Validate BCA Parameters Inside Revit
Senibina-Gateway brings CORENET X compliance directly into your BIM workflow. Validate BCA parameters, check requirements in real-time, and submit with confidence - all without leaving Revit.