ISO 3129-2012 pdf free download.Wood – Sampling methods and general requirements for physical and mechanical testing of small clear wood specimens.
ISO 3129 specifies methods for the extensive and limited sampling of wood, conditioning and preparation of test pieces. It also specifies the general requirements for physical and mechanical testing of small clear wood specimens. The sampling guidance provided in this International Standard can be applied for timber taken from either trees, logs, or pieces of ungraded/graded/presorted sawn timber for non-stwctural applications, such as furniture, windows, doors. etc., only.
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.
ISO 3130. Wood — Determination of moisture content for physical and mechanical tests
ISO 3131, Wood — Determination of density for physical and mechanical tests
ISO 3132. Wood — Testing in compression perpendicular to grain
ISO 3133. Wood— Determination of ultimate strength in static bending
ISO 3345, Wood— Determination of ultimate tensile stress parallel to grain
ISO 3346, Wood — Determination of ultimate tensile stress perpendicular to grain
ISO 3348, Wood— Determination of impact bending strength
ISO 3349, Wood — Determination of modulus of elasticity in static bending
ISO 3350, Wood— Determination of static hardness
ISO 3351, Wood— Determination of resistance to impact indentation
ISO 4469, Wood— Determination of radial and tangential shrink.age
ISO 4858, Wood— Determination of volumetric shrinkage
ISO 4859, Wood — Determination of radial and tangential swelling
ISO 4860, Wood— Determination of volumetric swelling
ISO 8905, Sawn timber — Test methods — Determination of ultimate strength in shearing parallel to grain
ISO 24294, Round and sawn timber — Vocabulary
EN 1534, Wood flooring — Determination of resistance to indentation — Test method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 24294 apply.
4 General principles
This International Standard covers procedures of sampling for obtaining small clear specimens which, when tested in accordance with methods prescribed under relevant International Standards, may provide information on the influence on mechanical properties of such factors as moisture content, density, position in cross- section, height in the tree and locality of growth.
NOTE These International Standards (ISO 3130, ISO 3131, ISO 3132, ISO 3133, ISO 3345, ISO 3346, ISO 3348. ISO 3349, ISO 3350, ISO 3351, ISO 4469, ISO 4858, ISO 4859 and ISO 4860) are currently being revised.
5 Sampling
5.1 Selection of material
The material intended for physical and mechanical tests shall be selected taking into account the purpose of the test, as well as the requirements to ensure that the properties obtained from the test pieces represent the sample population.
5.2 SamplIng of wood material
The material selected shall be in the form of either logs or sawn timbers.
5.2.1 Logs
Trees or logs shall be selected to represent the population. For each species to be tested, at least five trees or logs representative of that species or species group shall be selected.
A heart plank shall be cut from a log of acceptable diameter. For a log having an eccentric structure, the heart plank shall cover the geometrical centre (Figure 1). In the case of a log having a diameter of 180 mm or less, the heart plank shall be cut in the direction of two mutually perpendicular diameters (Figure 2).
In the case of an eccentric structure, the plank shall include the pith and not the geometrical Centre.
The thickness of the heart plank shall be at least 60 mm, except for logs with a diameter of 180 mm or less. where the thickness shall be 40 mm. In this case, to obtain test pieces with a cross-sectional dimension greater than 30 mm, a disc that is at least 100 mm thick shall be cut from one end of the log prior to sawing out heart planks. This disc may be used for the hardness test.
5.2.2 Matching for test of dry material
If one purpose of the sampling is to provide comparison of green and dry properties, provisions may be made for matching of specimens within the tree. The collection of the material has been arranged to provide for tests of both green and dry specimens that are closely matched by selection from adjacent parts of the same tree.ISO 3129 pdf free download.
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