AS/NZS 1605.3:2018 pdf free download.Methods for sampling and analysing timber preservatives and preservative-treated timber – Part 3: Analysis methods for determination of preservative retention.
This Standard specifies analysis methods for determining preservative retention in preservative-treated wood products. The calculations necessary for determining compliance with the requirements specified in the AS/NZS 1604 series and NZS 3640 are outlined.
1.2 APPLICATION
This Standard should be read in conjunction with
(a) the AS/NZS 1604 series, NZS 3640 or the relevant Standard to which timber is claimed to have been treated; and
(b) AS/NZS 1605.1.
Methods for sampling and analysing timber preservatives and preservative-treated timber are categorized into the following parts of the ASINZS 1605 series, according to the general nature of the tests:
(I) Sampling preservative liquids and preservative-treated timber . .. Part 1.
(ii) Determination of presence of sapwood and heartwood ………………………………. Part 1.
(iii) Determination of preservative penetration by spot tests Part 2.
(iv) iialy’sis of preservative retention ………………………………………………………….. Part 3.
(v) Analysis of preservative solution concentration ….. …… . . .. Part 4.
1.3 REFERENCED DOCUMENTS
The following documents are referred to in this Standard:
ASINZS
1604 Specification for preservative treatment (all parts)
1605 Methods for sampling and analysing timber preservatives and preservative-treated timber (all parts)
1605.1 Part 1: General requirements. sampling. and determination of sapwood and heariwood presence
ASINZS
4491 Timber—Glossary of terms in timber-related Standards
NZS
3640 Chemical preservation of round and sawn timber
1.4 DEFINITIONS
Refer to AS/NZS 1605.1 for applicable definitions.
1.5 PREPARATION OF TEST PIECES FROM TEST SPECIMEN
Test pieces shall be prepared from test specimens cut according to ASINZS 1605.1, from samples taken according to AS/NZS 1605.1.
The material for analysis shall be evenly cut from across the full cross-section of the penetration zone for the appropriate hazard class specified in the AS/NZS 1604 series or the relevant Standard.
1.6 USE OF ANALYTICAL METHODS FOR EXAMINATION OF PRESERVATIVE PENETRATION
Analytical methods may be used where no effective spot test is available. In such cases, the sample shall be taken from the central ninth of the sapwood penetration zone.
Where heartwood penetration or an envelope is specified, additional samples shall be taken adjacent to the boundary of the required penetration zone. Each sample taken shall be analysed individually for the presence of preservative. For example, in the case of an 1-13 sample, the central ninth of the penetration zone is required to be analysed as one sample, and samples taken from the heariwood analysed separately.AS/NZS 1605.3:2018 pdf free download.