BS ISO 21723:2019 pdf download – Buildings and civil engineering works — Modular coordination — Module
This document establishes the values of basic module, multimodules for horizontal coordinating dimensions and sub-modular increments for use in modular coordination of buildings. This document also specifies preferred vertical modular dimensions, series of preferred multimodular sizes for horizontal dimensions for all types in accordance with general principles and rules for modular coordination.
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 6707-1, Buildings and civil engineering works — Vocabulary — Part 1: General terms
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6707-1 and the following apply.
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modular storey height
vertical dimension between two modular floor planes of two consecutive floors
[SOURCE: ISO 1791:1983, 25]
modular? floor? height
vertical dimension of the modular floor zone between the modular plane of the upper surface of the
floor covering and the modular plane of the finished ceiling
[SOURCE: ISO 1791:1983, 27, modified — “a floor covering” has been replaced with “the floor covering”.]
4.1 Basic module
4.1.1 The basic module is represented by the letter M.
4.1.2 The international standardized value of the basic module is
1 M = 100 mm
NOTE Annex A provides imperial units.
4.2 Multimodules for horizontal coordination dimensions
4.2.1 The international standardized values of multimodules for horizontal coordinating dimensions are 3 M, 6 M, 12 M, 30 M, 60 M.
NOTE 1 The multimodule 15 M can also be used for special applications.
NOTE 2 See also ISO 8560.
4.2.2 The series of preferred multimodular sizes for horizontal dimensions are shown in Table 1.
4.2.4 The 15 M, 30 M and 60 M series correspond to the series in a system of preferred numbers which contain the factor five. These series can also be extended to use larger increments in the series of the multimodule 60 M such as 120 M or larger.
4.2.5 In the selection of sizes from Table 1, preference should be given to the series of the largest multimodule compatible with functional requirements and economic design.
4.2.6 The preferred multimodular sizes for horizontal dimensions are primarily intended for sizing of components, groups of components and spaces.
4.2.7 The series are standardized for general guidance. Functional, economical and especially national considerations may justify the use of multimodular sizes which are not included in the series.
4.3 Modules for vertical coordination dimensions
4.3.1 The modular storey height and the modular room height shall be chosen from the following modular sizes:
— up to 36 M: 1 M increment step
— from 36 M to 48 M: 3 M increment step
— above 48 M: 6 M increment step
4.3.2 The modular storey height combined with the modular floor height determines the modular room height when the modular floor plane coincides with the upper surface of the floor covering [see Figure 1, a)]. As the modular floor height (according to the type of building system, construction, span, etc.) may have any modular value from 2 M and upwards, the standard series for modular storey heights given above correspond to an increased series of modular room heights with 1 M increments.
In Figure 1, a), b), c) and d) illustrate the situation at different positions of the modular floor plane.
4.4 Sub-modular increments
4.4.1 The international standardized value of the the sub-modular increment is M/2 = 50 mm.
4.4.2 Sub-modular increments are to be used where there is a need for an increment smaller than the basic module.
4.4.3 Sub-modular increments should not be used for determining the distance between modular reference planes of a modular grid.BS ISO 21723 pdf download.