Specialty Timbers New ZealandAS/NZS 4063.1:2010
Characteristic stresses for grades of any timber species can be determined by testing a reference sample in accordance with AS/NZS 4063.1:2010.
The properties that are evaluated for the reference sample include:
- Bending strength;
- Modulus of elasticity;
- Strength in tension; and
- Strength in compression
The initial evaluation shall:
- Identify the reference sample;
- Identify the sorting procedure;
- Identify the grades and sizes to which the procedure relates;
- Evaluate the properties of the sample according to the requirements of AS/NZS 4063 using appropriately calibrated equipment and appropriately trained staff under the supervision of an independent suitably qualified organisation;
- State or derive target bending strength and modulus of elasticity values for the grade/size combinations that the producer proposes supplying;
- State or derive machine threshold values and visual characteristics where the grading method is machine grading;
- State or define visual characteristics where the grading method is visual grading; and
- Document the evaluation in a report, copies of which shall be held by the audit organisation and the producer.
A 2011 Scion quote for this work is here. The cost per species at that time was around $4200 + gst.
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