1 Scope
This standard specifies the method for determining the characteristic values of mechanical properties of the structural-use oriented strand board, including the sampling, test methods and characteristic values determination of oriented strand board.
The methods specified in this standard are applicable to structural-use oriented strand board with timber as raw materials.
2 Normative references
The following referenced documents are indispensable for the application 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.
GB/T 17657 Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels
GB/T 18259 Terms of wood-based panel and its surface decoration
GB/T 31264-2014 Test methods for mechanical properties of structural wood-based panels
LY/T 1580 Oriented strand board
LY/T 2059 Steel nails for timber structures
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purpose of this document, the terms and definitions specified in GB/T 18259 and LY/T 1580 as well as the following ones apply.
3.1.1
structural-use oriented strand board (OSB)
oriented strand board serving as the basic member of buildings or other structures and used under bearing conditions
3.1.2
characteristic values of mechanical properties
statistical value obtained through calculation with test data, which is used to judge the properties of the structural-use OSB or to determine the design values and which, in this standard, is the fractile of 5% or average value on the basis of assuming that the confidence coefficient is 75% for the statistical distribution of corresponding mechanical property indexes
3.1.3
major axis; primary axis
direction of board parallel to the oriented forming direction of the stand board on surface, which has much better mechanical property than the minor axis and which, for the oriented strand board with the size of 1,220 mm×2,440 mm, generally refers to the 2,440 mm direction, i.e., the length direction of the board
Foreword i
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Sampling and test piece preparation
5 Test methods
5.1 Moisture content and air-dry density
5.2 Bending performance
5.3 Planar shear resistance
5.4 Through-the-thickness shear resistance
5.5 Axial tension property
5.6 Axial compressive property
5.7 Nail-holding ability
5.8 Dowel-bearing strength
5.9 Nail-head pull-through resistance
5.10 Board surface compressive strength
6 Determination of characteristic values
Annex A (Informative) Determination of equivalent specific gravity value of connection performance of OSB
Annex B (Normative) Characteristic value coefficient and sequence
