AS NZS 2588:2018 pdf download.Gypsum plasterboard.
3 Normative documents
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 for informative purposes are listed in the Bibliography. AS 2193, Calibration and classification offorce measuring systems AS 2753, Adhesives — For bonding gypsum plaster linings to wood and metaiframing members
4 Definitions
For the purpose of this Standard, the definitions below apply. 4.1 edge the machine-wrapped edge of a gypsum plasterboard sheet 4.2 end a factory-cut or field-cut of a gypsum plasterboard sheet which exposes the gypsum core 4.3 gypsum plasterboard a machine-made board consisting of a core essentially of cast gypsum plaster with both faces and the longitudinal edges encased in a plasterboard liner 4.3.1 bracing grade gypsum plasterboard that forms part of a system to provide a defined bracing resistance 4.3.2 fire-resistant grade gypsum plasterboard that forms part of a system to provide a defined fire resistance Note 1 to entry: This is generally achieved by additives to the core to improve core adhesion at high temperatures and the addition of mineral fibres for strength. 4.3.3 standard grade gypsum plasterboard with basic attributes which is capable of accepting decoration 4.3.4 water-resistant grade
gypsum plasterboard with additives in the core and/or the paper liners to reduce the water absorption rate 4.4 may indicates the existence of an option 4.5 recessed edge an edge which is tapered on the face side to form a recess for jointing 4.6 shall indicates that a statement is mandatory 4.7 should indicates a recommendation
5 Classification
Gypsum plasterboard shall be classified by the following grades (see Clause 4.3) and by performance requirements (see Clause 9): (a) Bracing grade. (b) Fire-resistant grade. (c) Standard grade. (d) Water-resistant grade.
6 Dimensions
6.1 Thickness The nominal thickness of gypsum plasterboard shall be — (a) 10 mm; (b) 13 mm; (c) 16 mm; (d) l9mm;or (e) 25 mm. The average thickness of gypsum plasterboard, when measured in accordance with Appendix B, shall be within ± 0.5 mm of the nominal thickness. The thickness range for each board measured shall not exceed 0.8 mm for standard grade plasterboard and 1.2 mm for fire-resistant grade plasterboard. NOTE Other thicknesses of gypsum plasterboard may be manufactured to special order but are not covered by this Standard. 6.2 Width The nominal width of gypsum plasterboard shall be — (a) 600 mm; (b) 900 mm; (c) l200mm;or (d) 1350 mm. The actual width of gypsum plasterboard shall be within ± 3 mm of the nominal width. 6.3 Length The length of gypsum plasterboard sheets shall be within ± 5 mm of the nominal specified length. 6.4 Squareness The cut ends of the board shall be square with the edges within ± 3 mm in the full width of the board.
7 Edge finish
Edges of gypsum plasterboard shall be square, recessed or bevelled to suit the specified joint finish, see Figure 1.
8 Suitability for decoration
Gypsum plasterboard should have a face which is free from defects such as — (a) corrugations; (b) ripples; (c) stains which would bleed through a painted finish; or (d) any other defects which would adversely affect decorative paint finishes.
9 Performance requirements
9.1 Gypsum plasterboard 9.1.1 General All classifications of gy psum plasterboard shall conform with Clauses 9.1.2 to 9.1.6. In addition, water-resistant grade plasterboard shall conform with Clause 9.2. 9.1.2 Bending strength
When tested in accordance with Appendix C using the loads given in Table 1, the plasterboard shall not break or delaminate. NOTE The bending strength test is used to ensure the gypsum plasterboard has sufficient strength to withstand bending during installation and the resistance to in-service loads. 9.1.3 Edge hardness When tested in accordance with Appendix D. gypsum plasterboard shall have an edge hardness of not less than 45 N. NOTE The edge hardness test is used to ensure the gypsum plasterboard edge can resist crushing during handling and installation. 9.1.4 Nail pull resistance When tested in accordance with Appendix E, gypsum plasterboard shall have minimum nail pull resistance appropriate to its intended use as shown in Table 2. NOTE The nail pull test is used to ensure the gypsum plasterboard has sufficient strength to resist fastener pull through due to in-service loads.AS NZS 2588 pdf download.