This standard specifies the terms and definitions, classification and designation, requirements, test methods, inspection rules, and marking, packing, storage and transportation for gypsum plasterboard.
This standard is applicable to gypsum plasterboard intended to be used as non-bearing internal partition wall and suspended ceiling in buildings, as well as to base board for gypsum plasterboard finishes subjected to secondary finish processing.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding any corrigendum), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For any undated references, the latest edition of the document referred to applies.
GB/T 1250 Rules for Expression and Judgement of Limiting Values
GB/T 9776 Calcined Gypsum
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
Edge
Paper covered longitudinal sides
3.2
End
Cut sides transverse to the edges
3.3
Face
The surface on which the paper extends continuously to cover the edges
3.4
Back
The surface having a double thickness of paper along the two edges
3.5
Face paper
Paper on the board face
3.6
Back paper
Paper on the board back
3.7
Core material
Paper-covered material, mainly made from dihydrate gypsum
3.8
Length
Dimension of the board parallel to the edges
3.9
Width
Dimension of the board perpendicular to the edges
3.10
Thickness
Vertical distance between the face and the back of board
3.11
Gypsum plaster
Powdery cementing material as specified in GB/T 9776
