AS 2455.2 pdf download

AS 2455.2 pdf download.Textile foor coverings — Installation practice
1  Scope
This Standard specifies requirements and procedures for the installation of square carpet tiles. NOTE  It is recognized that not all carpet tiles will be able to be installed in accordance with this Standard. Manufacturers’ instructions, particularly regarding shaped carpet tiles, may vary from these requirements and where this occurs, the manufacturer’s instructions should be followed.
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. NOTE  Documents referenced for informative purposes are listed in the Bibliography. AS 1684, Residential timber-framed construction (all parts) AS/NZS 2454, Textile floor coverings—Terminology AS 2455-1, Textile floor coverings—Installation practice, Part 1: General NZS 3604, Timber-framed buildings EN 12825, Raised access floors
3  Definitions
For the purpose of this Standard, the definitions given in AS/NZS 2454, AS 2455.1 and those below apply. 3.1 cable trunking a trunk or trough for housing and protecting electrical cables and conductors which are laid in place after trunking has been installed. Also called “cable trough” or “cable troughing” 3.2 competent person a person who has acquired through training, qualifications or experience, or a combination of these, the knowledge and skills enabling that person to perform the task required 3.3 low adhesive installation an installation system for modular textile floor coverings (carpet tiles and planks) that uses adhesive coated “connectors” (e.g. polyester/plastic squares or dots with adhesive on one or both sides) 3.4 may indicates the existence of an option 3.5 pressure-sensitive adhesive installation system an installation system where a pressure-sensitive adhesive is applied to cover 100 % of the subfloor (including any cable trunking) or access panel floor
4  Pre-laying requirements
4.1  General Pre-laying requirements shall be in accordance with AS 2455.1. Prior to commencement, it should be ascertained that carpet tiles, type, colour, batch numbers, and arrow/pile direction, are all in accordance with the customer’s specification. 4.2  Subfloor condition and preparation Subfloor preparation shall be in accordance with AS 2455.1, and the following requirements: (a) The subfloor shall be rigid, clean and dry and be free of materials that may adversely affect the carpet tiles. (b) Where there is cable trunking, the finished surface shall be level with the subfloor. (c) The subfloor shall be tested for moisture content (RH %) and alkalinity (pH) as specified in AS 2455.1. 4.3  Dual bond system For the dual bond system, unless otherwise specified, the underlay shall be removed from its packaging and left fully unrolled for a period of not less than three hours, for conditioning purposes. The adhesive manufacturer’s recommendations on the adhesive application method and rates shall be followed. 4.4  Access panel floors Access panel floors shall be true and square and constructed and installed in accordance with EN 12825. NOTE  Attention is drawn to definitions of “plane” and “smooth” in AS 2455.1.
5  Setting up
5.1  General The contractor shall request the purchaser to supply relevant site information prior to installation (see Appendix A). In setting up, a point in the room shall be determined from which carpet tiles can be installed to ensure that they are laid — (a) unless specified otherwise, parallel to the longest wall (see Figure 1); (b) where practical, with full tiles in doorways and high traffic areas (see Figure A.5.1); (c) on access floors, unless a carpet tile is manufactured to fit one access panel, with the edge of a carpet tile not corresponding with access floor panel joints; (d) when setting up in large floor plates within a central core, run a string line around the central core then install out into the quadrants (see Figure A.5.2);(e) when setting up for a border installation, start square at the centre of the filled area and mark the borders square to this. This will provide a straight border line leaving any undulations against the wall (see Figure A.5.3); and (f) once a 90 degree angle is set, install the tiles using the “stair” method to maintain in square and keep grid (see Figure 2).