ISO 4172:2024
Technical product documentation (TPD)
- Standard No.
- ISO 4172:2024
- Release Date
- 2024
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 4172:2024
- Introduction
Interpretation of the core content of the standard
As an international standard for prefabricated structure assembly drawings, the technical evolution of ISO 4172:2024 is mainly reflected in the collaborative requirements between three-dimensional models and two-dimensional drawings. Compared with the 1991 version, the new version of the standard mainly updates the following contents:
Technical dimension 1991 version 2024 version Drawing type Positioning drawing General arrangement drawing (including BIM LOD200-300 requirements) Line type specification 4 basic line types Expanded to 6 line types (new type 01.3/02.3) Tolerance annotation Reference to ISO 2768 Synchronize with ISO 14405 GPS standard
Key technical requirements
1. Drawing hierarchy system
The standard establishes a five-level drawing structure:
- General arrangement drawing (1:50-1:200)
- Assembly drawing (1:20-1:50)
- Component drawing (1:10-1:20)
- Detailed drawing (1:1-1:10)
- Component list
2. Line type application specifications
Specially stipulates that cutting planes must use type 01.3 extra thick solid lines, and hidden components use type 02.2 thick dashed lines. Grid lines need to be distinguished:
- First-level modular lines: type 01.1 thin solid lines
- Second-level modular lines: type 01.2 thick solid lines
BIM implementation recommendations
In the Building Information Modeling environment, the standard recommends the use of the ISO 81346-12 reference identification system. Component coding should include:
[Main code]-[Additional code]-[Serial number] Example: W-E1-LEVEL2-003 (type E1 wall panel, located on the 2nd floor, numbered 003)
Special attention should be paid to the coordinated application with ISO 7519 to ensure the consistency of information level transmission.
Construction tolerance control
The standard requires that both manufacturing tolerance and construction tolerance be marked, where:
- Dimensional tolerances are in accordance with ISO 14405 series
- Limit deviation markings are in accordance with ISO 6284
Typical node details should include process descriptions such as welding/bolting (see Figure 8/9 for examples).
ISO 4172:2024 Referenced Document
- ISO 10209 Technical product documentation — Vocabulary — Terms relating to technical drawings, product definition and related documentation
- ISO 129-1 Technical product documentation (TPD) — Presentation of dimensions and tolerances — Part 1: General principles — Amendment 1
- ISO 4157-1 Construction drawings - Designation systems - Part 1: Buildings and parts of buildings
- ISO 6284 Technical product documentation — Construction documentation — Indication of limit deviations
- ISO 6707-1 Buildings and civil engineering works — Vocabulary — Part 1: General terms
- ISO 7200 Technical product documentation - Data fields in title blocks and document headers
- ISO 7519 Technical product documentation (TPD) — Construction documentation — General principles of presentation for general arrangement and assembly drawings*， 2025-02-20 Update
- ISO 7573 Technical product documentation - Parts lists
ISO 4172:2024 history
- 2024 ISO 4172:2024 Technical product documentation (TPD)
- 1991 ISO 4172:1991 Technical drawings; construction drawings; drawings for the assembly of prefabricated structures
- 1981 ISO 4172:1981 Building and civil engineering drawings — Drawings for the assembly of prefabricated structures
