National foreword

This British Standard reproduces verbatim ISO 128:2000 and implements it as the UK national standard. This standard, together with BS 8888 and other implemented European and International Standards listed in annexes A and B of BS 8888, supersedes all parts of BS 308 which are withdrawn.

The European and International Standards that were implemented to form subsections of Part 3 of BS 308 and were dual numbered, are now listed by the implementation number only, e.g. BS EN ISO xxxx. The pocket guide previously available is currently under review.

The UK participation in its preparation was entrusted to Technical Committee TDW/4, Engineering drawing, metrology, precision measurement and all related documentation, which has the responsibility to:

aid enquirers to understand the text;
present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
monitor related international and European developments and promulgate them in the UK.

A list of organizations represented on this committee can be obtained on request to its secretary.

Cross-references

The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue.

A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 15 and a back cover.

The BSI copyright notice displayed in this document indicates when the document was last issued.

This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 2000

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO member bodies). The work of developing Inter-national Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council.

International Standard ISO 128 was developed by Technical Committee ISO/TC 10, Technical drawings, and was circulated to the member bodies in April 1980.

It has been approved by the member bodies of the following countries :

The member bodies of the following countries expressed disapproval of the document on technical grounds :

This International Standard together with ISO 6410‑1981 cancels and repalces ISO Recommendation R 128‑1959 of which it constitutes a technical revision.

1 Scope and field of application

This International Standard specifies the general principles of presentation to be applied to technical drawings following the orthographic projection methods.

Additional International Standards are under preparation for other methods of representation.

This International Standard is intended for all kinds of technical drawings (mechanical, electrical, architectural, civil engineering, etc.). However, it is recognized that in some specific technical areas the general rules and conventions cannot adequately cover all the needs of specialized practices, and that additional rules are required which may be specified in separate standards. For these areas the general principles should however, be respected in order to facilitate international exchange of drawings and to ensure the coherence of drawings in a comprehensive system relating to several technical functions.

Attention has been given in this International Standard to the requirements of reproduction, including microcopying.

2 Views

2.1 Designation of views

2.2 Relative position of views

2.3 Indication of method

2.4 Choice of views

2.5 Special views

2.6 Partial views

2.7 Local views

3 lines

3.1 Types of lines

3.2 Thicknesses of lines

3.3 Spacing of lines

3.4 Order of priority of coinciding lines

3.5 Termination of leader lines

4 Sections¹⁾

4.1 Notes on hatching of sections

4.2 Hatching to indicate type of materials

4.3 Thin sections

4.4 Notes on sections

4.5 Cutting planes (examples)

4.6 Sections revolved in the relevant view or removed sections

4.7 Half sections

4.8 Local sections

4.9 Arrangement of successive sections

5 Other conventions

5.1 Adjacent parts

5.2 Intersections

5.3 Conventional representation of square ends and openings

5.4 Parts located in front of a cutting plane

5.5 Views of symmetrical parts

5.6 Interrupted views

5.7 Simplified representation of repetitive features

5.8 Elements on a larger scale

5.9 Initial outlines

5.10 Use of colours

5.11 Transparent objects

BS ISO 128:1982

Technical drawings. General principles of presentation

Current

Published:

15 Sep 2000