AS/NZS 1605.1:2018 pdf free

09-01-2021 comment

AS/NZS 1605.1:2018 pdf free.Australian/New Zealand Standard Methods for sampling and analysing timber preservatives and preservative-treated timber.
This Section applies to the sampling of the following materials:
(a) Preservative liquid, for the determination of compliance with a specified composition.
(b) Preservative-treated timber sampled at random for the determination of penetration and, if applicable, retention of preservative.
Before sampling, the preservative liquid shall be thoroughly stirred, with heating as necessary, to produce a homogeneous mixture.
All containers used for removing or transporting the liquid sample shall be thoroughly rinsed with the liquid to be tested, with rinsings being returned to the bulk storage tank from which the liquid came.
All lines used in the sampling process shall be thoroughly flushed before the test sample is removed. Flushings shall be returned to the bulk liquid storage tank.
A liquid sample of sufficient volume to ensure accuracy shall be taken.
Unless otherwise specified, whole lengths of timber shall be selected by random sampling (see also Clause 2.4. 1).
NOTE: If acceptable to the specifier, sacrificial test samples may be used as long as
(a) sacrificial samples truly reflect the material being treated;
(b) sacrificial samples are distributed randomly throughout the charge of timber at the time of treatment;
(c) softwood samples are end-sealed with an impermeable coating; and
(d) hardwood samples are at least 1.2 m long: or 750 mm long with one end scaled.
Lengths of timber used as samples (actual or sacrificial) shall be representative of the species, thickness, moisture content and hcartwood content present in the sample. During sampling, the following shall be taken into consideration:
(a) If the preservative treatment is against borer attack, selection of non-susceptible timber will not truly reflect the effectiveness of the treatment.
(b) Visible features (e.g. knots) may influence the level of preservative treatment. As the presence of these features will have been taken into consideration in the selection of the material for structural purposes, the sample shall not include these features (see Note below).
(c) The removal of hcartwood/knots need only be performed for hazard classes where there are no heartwood penetration requirements.
(d) Where charges, lots or parcels contain a mixture of timber species, sampling shall reflect the material considered the most difficult to treat.
NOTE: Knots are not considered as typical of the treated timber and may have different treatment characteristics from clear wood. It is, therefore, necessary to exclude knots from the sample taken for analysis.AS/NZS 1605.1 pdf download.

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