TS ISO 129-5

TS ISO 129-5 is the part of the ISO 129 series devoted to structural metal work in technical product documentation. It addresses how dimensions and tolerances are indicated on general-purpose drawings for structural metal work, especially assemblies and members mainly made of plates, bars and profile sections, so that the information needed for manufacture, checking and assembly is presented consistently and clearly.

Why dimensioning matters in structural metal work

In structural metal work, a drawing has to communicate more than shape alone. Plates, bars and profile sections are commonly cut, drilled, welded and assembled into larger structures, so the way dimensions and tolerances are shown affects interpretation on the shop floor and during inspection. In general technical context, dimensioning standards help create a common drawing language that reduces ambiguity and supports consistent fabrication.

What this part focuses on

• General-purpose dimensioning of drawings for structural metal work
• The main product forms covered: plates, bars and profile sections
• Presentation of dimensions and tolerances on drawings rather than detailed design calculations
• Its role as one part within the broader ISO 129 technical product documentation series

As a result, this standard should be understood as an application-oriented drawing standard for structural metal work. Its practical value lies in helping designers, drafters and production teams express measurement information in a clear, conventional and technically consistent way.