ISO 129-5:2018 pdf download.Technical product documentation一Indication of dimensions and tolerances
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-roIled 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
150 657-18, Hot-rolled steel sections — Part 18: L sections for shipbuilding (metric series) — Dimensions, sectional properties and tolerances
150 657-21, Hot-rolled steel sections — Part2l: 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://wwv.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 centroidal line
line passing through the centre of mass
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.
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 the shape of profile sections, see Table 1 to Table 3.The proportion and dimensions of the graphical symbols shall be as specified in Annex A. "Standard number" is the code of technical standard which specifies the technical requirements of the section."Necessary size" is the main size of the section. The parameters of size should be separated with the times sign, "x", see Table 1 to 3.ISO 129-5 pdf download.