Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 12: Construction works and building services
1Key Takeaways
This document establishes rules for structuring of systems and the formulation of reference designations and provides classes for systems in the field of construction works and building services. This document also specifies a classification of objects and corresponding letter codes for use in reference designations of…
2Expert Interpretation
This article provides an in-depth interpretation of the ISO 81346-12:2018 international standard, covering the structured principles and reference designation system for industrial systems, building facilities, and building services. It details four structured approaches: function-oriented, product-oriented, location-oriented, and type-oriented. Application cases and classification codes are provided in the construction sector to facilitate full project lifecycle management.
Analysis of the core content of the standard
ISO 81346-12:2018 provides a systematic reference identification framework for construction engineering projects. Its core includes:
| Structural dimension | Prefix symbol | Typical application scenario |
|---|---|---|
| Function-oriented | = | System design, fault diagnosis |
| Product-oriented | - | Assembly and maintenance, construction drawings |
| Location-oriented | + | Space planning, equipment positioning |
| Type orientation | % | Bill of materials, object classification |
Classification system for building field
Appendix A of the standard provides a detailed classification of functional systems and technical systems:
Typical application case
Example of identification of HVAC system in a certain intelligent building project:
- Function identification: =J1.HF4 (air conditioning system 1-heat exchange unit 4)
- Product identification: -J1JJ12WPB25 (duct system 1-branch 12-duct 25)
- Location identification: ++15.2.10 (Building 15 - Area 2 - Floor 10)
Implementation recommendations
- Clearly identify the top-level node of each system during the project initiation phase (e.g., <L> indicates a building element)
- Use a three-letter code system to distinguish components such as wall system (AD) and floor structure (BD)
- Supplement material properties through attribute annotation: -AD2 (Ss_25_11_15) indicates a concrete masonry wall system
- Establish a digital delivery standard for cross-disciplinary collaboration to ensure the consistency of the identification system throughout its life cycle
Technology evolution analysis
This standard is consistent with ISO 12006-2 and IEC 81346-1 forms a complementary system, and its innovations include:
- Introduction of dual location identification of installation point (+) and installation location (++)
- Extension of building-specific classification codes (such as QQC for door and BAA for office)
- Support for the associated storage of object attributes and reference identifiers in the BIM environment