TS 2120

TS 2120 is a standard focused on how dimensions are represented in building production and construction drawings. In technical drawing practice, this kind of standard helps distinguish the dimensions used for coordination from the dimensions that govern actual fabrication or site execution, reducing ambiguity when different drawing sets are used across a project.

Separating coordination dimensions from actual work dimensions

In building documentation, coordination dimensions describe the layout relationship of components within a modular or other reference system, while production or work dimensions are the measurements used for making and installing elements. That distinction matters for walls, openings, voids, finishes and other building components, where a drawing must clearly show what is being coordinated and what is to be built. The standard addresses this drawing method and the separation of these dimension types.

Why this matters in building drawings

In general technical practice, dimensioning rules support legibility, multidisciplinary coordination and fewer interpretation errors on site. Architectural, structural and building-services drawings all need a clear dimensional reference so that teams can work from a consistent understanding of the design. By covering the first group of rules for building working drawings, this standard provides a common visual discipline for presenting component sizes.

• Applies to building production/construction drawings.
• Addresses separation of dimensions from coordination dimensions.
• Helps clarify how work and production sizes are read in drawings.
• Recorded as equivalent to ISO 2595:1973.
• This is a withdrawn TSE standard.