The Future of IFC: What's Coming in IFC5

Understanding IFC5: The Next Generation

The Industry Foundation Classes (IFC) standard is the backbone of open BIM data exchange. With IFC5 on the horizon, the AEC industry is preparing for significant changes.

What is IFC?

For those unfamiliar, IFC is an open, international standard for BIM data that allows different software applications to share building information seamlessly.

Key Changes in IFC5

1. Modular Architecture

IFC5 introduces a modular approach:

• Core module for essential building elements
• Domain-specific extensions
• Easier maintenance and updates
• Reduced complexity for implementers

2. Improved Geometry Handling

New geometry capabilities include:

• Better support for complex shapes
• Improved tessellation options
• Enhanced NURBS support
• More efficient file sizes

3. Enhanced Infrastructure Support

IFC5 expands beyond buildings to include:

• Roads and highways
• Railways
• Bridges and tunnels
• Ports and waterways

4. Better Property Management

Property handling improvements:

• Simplified property definitions
• Better validation support
• Enhanced internationalization
• Improved versioning

Timeline and Adoption

• 2026 Q2: Draft specification release
• 2026 Q4: Public review period
• 2027 Q2: Final specification
• 2027-2028: Software vendor adoption

Preparing for IFC5

Organizations should:

1. Stay informed about specification developments
2. Participate in industry working groups
3. Plan for software upgrades
4. Update BIM standards and guidelines

Conclusion

IFC5 represents a significant evolution in open BIM standards. By understanding these changes now, organizations can prepare for a smooth transition.