TS 88-21 EN ISO 128-21 (Eski no: TS 88-21 ISO 128-21)

TS 88-21 EN ISO 128-21 (Eski no: TS 88-21 ISO 128-21): TS 88-21 EN ISO 128-21 is a standard focused on preparing lines in CAD systems for technical drawings, with emphasis on methods for calculating the main basic types of non-continuous lines. In technical drawing, line language is central to legibility and to the faithful communication of geometry, so consistency in how line patterns are generated matters greatly.

Non-continuous line types and their elements

The standard covers procedures for calculating the most important basic types of non-continuous lines according to TS ISO 128-20 and their line elements. The technical concern here is not only the visual appearance of a line, but also how its elements are defined and repeated in a CAD environment so that a stable and reproducible presentation is achieved. In engineering graphics, continuous and non-continuous lines are used to distinguish visible edges, hidden edges, axes, and other graphical conventions.

Standardised drawing behaviour in CAD

In general technical context, CAD systems control line type by scale, length, spacing, and repeat pattern to help produce drawings with comparable readability across software and output media. Because this standard deals with calculation methods for line elements, it supports a disciplined drawing approach that helps maintain graphic consistency in engineering documentation. It belongs to the wider family of technical drawing presentation principles and contributes to uniform representation in engineering practice.