ISO 129-5:2018 pdf download – Technical product documentation — Indication of dimensions and tolerances — Part 5: Dimensioning of structural metal work.
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/
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.