AS ISO 128.22-2005 PDF

Full title and description

Technical drawings — General principles of presentation — Part 22: Basic conventions and applications for leader lines and reference lines. Specifies general rules on the presentation of leader and reference lines and their components, and the arrangement of instructions on or at leader lines in all kinds of technical documents.

Abstract

This standard sets out the basic conventions, graphical forms and recommended applications for leader lines and reference lines used in technical drawings and related documentation. It defines how leader/reference lines attach to features, recommended line endings and arrowheads, spacing and placement of associated text or dimension indications to ensure clear, unambiguous presentation.

General information

• Status: Current (AS adoption of ISO text; reconfirmed by Standards Australia in 2016).
• Publication date: 05 April 2005 (AS ISO 128.22-2005).
• Publisher: Standards Australia (AS adoption of the ISO part).
• ICS / categories: Technical drawings / graphical presentation; part of the ISO 128 series (technical drawing general principles).
• Edition / version: First AS edition (AS ISO 128.22-2005), text identical to ISO 128‑22 (1999) as adopted.
• Number of pages: 8 pages (AS published product specification).

Scope

Defines general rules and basic conventions for leader lines and reference lines used across technical documents: their graphic form, components (lines, arrowheads, hooks, termination symbols), recommended spacing and positioning relative to the drawing content, and conventions for placing notes or instructions on or adjacent to leader lines. The intent is to standardize presentation so that annotations and references on drawings are clear and consistently interpreted.

Key topics and requirements

• Definitions and basic conventions for leader lines and reference lines (forms, thicknesses, and continuity).
• Recommended arrowheads and termination styles (dots, hooks, arrows) and when to use each.
• Attachment rules: how leader lines connect to features, edges, surfaces and notes to avoid ambiguity.
• Placement and arrangement of text, symbols and instructions associated with leader lines to maintain legibility.
• Examples and typical applications across mechanical and other engineering drawings (consistent with the ISO 128 series conventions).

Typical use and users

Used by drafters, CAD operators, design engineers, technical illustrators, document controllers and standards committees to ensure consistent annotation and referencing on engineering and technical drawings. Commonly applied in mechanical engineering, manufacturing documentation, assembly drawings and other technical documentation where clear leader/reference annotation is required.

Related standards

Part of the ISO 128 series (General principles of presentation). Related parts include ISO 128-20 (basic conventions for lines), ISO 128-30 (basic conventions for views), ISO 128-40 (conventions for cuts and sections) and other ISO 128 subparts addressing line conventions across disciplines. National adoptions and related AS standards on drawing presentation and symbols reference or incorporate AS ISO 128.22-2005.

Keywords

leader lines, reference lines, technical drawings, drawing annotations, arrowheads, ISO 128, presentation conventions, Standards Australia.

FAQ

Q: What is this standard?

A: It is AS ISO 128.22-2005, the Australian adoption of ISO 128‑22, covering basic conventions and applications for leader lines and reference lines in technical drawings.

Q: What does it cover?

A: Graphic forms and conventions for leader/reference lines (line styles, terminations, attachment rules), and guidelines for placing associated notes or instructions so that annotations are clear and unambiguous.

Q: Who typically uses it?

A: CAD drafters, design and manufacturing engineers, technical illustrators and document controllers who prepare or review engineering drawings and related technical documentation.

Q: Is it current or superseded?

A: The AS adoption (AS ISO 128.22-2005) has been maintained as current in Australia and was reconfirmed in 2016; the underlying ISO part is listed as ISO 128‑22 (1999) in the ISO 128 series. Users should check national catalogues for any later revisions or replacements.

Q: Is it part of a series?

A: Yes — it is one part of the ISO 128 series (Technical drawings — General principles of presentation), which includes multiple numbered parts addressing lines, views, sections and other drawing conventions.

Q: What are the key keywords?

A: Leader lines, reference lines, annotation, arrowhead, drawing presentation, ISO 128, technical documentation.