ISO 129-5:2018

Technical product documentation — Indication of dimensions and tolerances — Part 5: Dimensioning of structural metal work

ISO 129-5:2018 specifies the dimensioning of drawings for general use on structural metal work mainly consisting of plates, bars and profile sections.

Technique du produit documentation — Indication des cotes et tolérances — Partie 5: Cotes des ouvrages de structure métallique

General Information

• Status: Published
• Publication Date: 02-Apr-2018
• ICS: 01.100.01 - Technical drawings in general
• Technical Committee: ISO/TC 10/SC 6 - Mechanical engineering documentation
• Drafting Committee: ISO/TC 10/SC 6 - Mechanical engineering documentation
• Current Stage: 9060 - Close of review
• Start Date: 02-Dec-2028

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 129-5
First edition
2018-04
Technical product documentation —
Indication of dimensions and
tolerances —
Part 5:
Dimensioning of structural metal work
Technique du produit documentation — Indication des cotes et
tolérances —
Partie 5: Cotes des ouvrages de structure métallique
Reference number
ISO 129-5:2018(E)
©
ISO 2018

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ISO 129-5:2018(E)

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© ISO 2018
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ii © ISO 2018 – All rights reserved

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ISO 129-5:2018(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Basic requirements . 2
5 Simplified dimensioning of structural metal work . 2
6 Dimensioning of component profile . 2
6.1 Profile code . 2
6.2 Dimensioning samples . 3
6.3 Profile dimensioning in drawing . 7
7 Detail requirement. 9
7.1 Typical component dimensioning . 9
7.2 Dimensioning of bolts and rivets.12
7.3 Dimensioning of welding components .12
Annex A (normative) Profile graphical symbols .14
Annex B (informative) Dimensioning of weld components .16
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ISO 129-5:2018(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established 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.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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on the ISO list of patent declarations received (see www .iso .org/ patents).
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For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 10, Technical product documentation,
Subcommittee SC 6, Mechanical engineering documentation.
A list of all parts in the ISO 129 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

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INTERNATIONAL STANDARD ISO 129-5:2018(E)
Technical product documentation — Indication of
dimensions and tolerances —
Part 5:
Dimensioning of structural metal work
1 Scope
This document specifies the dimensioning of drawings for general use on structural metal work mainly
consisting of plates, bars and profile sections.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 129-1, Technical drawings — Indication of dimensions and tolerances Part 1: General principles
ISO 129-4, Technical product documentation (TPD) — Indication of dimensions and tolerances — Part 4:
Dimensioning of shipbuilding drawings
ISO 5261:1995, Technical drawings — Simplified representation of bars and profile sections
ISO 657-1, Hot-rolled steel sections — Part 1: Equal-leg angles — Dimensions
ISO 657-2, Hot-rolled steel sections — Part 2: Unequal-leg angles — Dimensions
ISO 657-16, Hot-rolled steel sections — Part 16: Sloping flange column sections (metric series) — Dimensions
and sectional properties
ISO 657-18, Hot-rolled steel sections — Part 18: L sections for shipbuilding (metric series) — Dimensions,
sectional properties and tolerances
ISO 657-21, Hot-rolled steel sections — Part 21: T-sections with equal depth and flange width — Dimensions
ISO 10209, Technical product documentation — Vocabulary — Terms relating to technical drawings,
product definition and related documentation
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10209, ISO 129-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
centroidal line
line passing through the centre of mass
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ISO 129-5:2018(E)

4 Basic requirements
Basic requirements of dimensioning are as follows:
a) The indication of dimensions and tolerances shall follow the general principles specified in
ISO 129-1.
b) The dimensions of structural metal work shall be simple and clear. The standard plates and profile
sections should be represented with code.
c) The datum line of dimensioning should be the centroidal line of component.
To maintain readability of drawings and to simplify drawing, dimension lines can be omitted as shown
in Figure 1.
5 Simplified dimensioning of structural metal work
Schematic dimensioning of structural metal work shall conform to the representation method specified
by ISO 5261.
The arc length of a circular structure in the frame should be dimensioned on one side of its line. An
example is shown in Figure 1.
Figure 1 — Dimensioning of arc sketch
6 Dimensioning of component profile
6.1 Profile code
The representation of profile sections shall use the form of Figure 2. A type code of “C” is required
to indicate cold formed sections and that the type code can be omitted for all other types of section.
"Graphical symbol or letter code" represents
...