TS 4220-1 EN ISO 4157-1

TS 4220-1 EN ISO 4157-1 addresses designation systems for buildings and building parts, together with the designation code used to identify them. In construction drawings and building documentation, the main objective is consistent identification of the same building, element, or part across different drawings and records, reducing ambiguity in plans, sections, layout drawings, and related documents.

How designation systems support building documentation

In general technical practice, a designation system is a structured way of naming objects in architectural and engineering documents. Using a uniform code for building envelopes, structural elements, parts, voids, and other components helps coordination between disciplines, supports revision control, and improves long-term archiving. The scope of this standard focuses on designation systems and a designation code for buildings, so it is concerned with identification order rather than dimensions or structural performance.

Why the distinction between building, element, and component matters

• Building: the whole structure or main building unit as the top-level reference.
• Building elements: major subparts such as walls, floors, roofs, and other architectural or structural elements.
• Building components: more detailed sub-items or constituent units used in documentation.
• Voids: openings or spatial divisions that also need clear identification in drawings.
• Designation code: the short, consistent notation that lets the same item be referenced across documents.

Because the standard applies to buildings and parts of buildings, it does not automatically extend to every possible construction context. In practical documentation workflows, a common designation scheme helps different teams use the same references and keeps building information readable throughout the project lifecycle.

This part belongs to the EN ISO 4157 family, with related parts providing complementary detail within the same subject area. For that reason, TS 4220-1 is a useful starting point for understanding the basic organisation of building designations in technical drawings.