TS EN ISO 128-3

TS EN ISO 128-3 addresses the general principles for presenting views, sections and cuts in technical product documentation. It is a common visual framework for technical drawings across several disciplines, built around orthographic projection so that external shape, internal features and functional details can be shown consistently and read unambiguously.

How views differ from sections and cuts

In technical drawing, a view shows the outside form of an object from a chosen direction. Sections and cuts are used when internal geometry or hidden features need to be communicated more clearly; by imagining a cutting plane through the object, the drawing can reveal shape relationships that would otherwise be difficult to interpret. This distinction matters in mechanical, electrical, architectural and civil engineering drawings, where a single representation often has to convey several layers of information without confusion.

What this document applies to

The document specifies general presentation principles applicable to many kinds of technical drawings and follows the orthographic projection methods defined in ISO 5456-2. It also points readers to ISO 128-15 for shipbuilding technical drawings and to ISO 16792 for views and sections in 3D models. Reproduction considerations are included as well, reflecting the need for drawings to remain legible when copied or microcopied.

• Provides a shared representation logic across engineering drawing disciplines.
• Uses orthographic projection as the basis for views and sections.
• Cross-refers to shipbuilding and 3D model conventions in related standards.
• Considers reproducibility and legibility in copied or microcopied drawings.