AS-NZS-1604.5-2005.pdf

as nzs 1604 5 2005 incorporating amendment no 1 australian new zealand standard specification for preservative treatment part 5 glued laminated timber products as nzs 1604 5 2005 accessed by tafe queensland institutes on 19 dec 2007 as nzs 1604 5 2005 this joint australian new zealand standard was prepared by joint technical committee tm 006 timber preservation and durability it was approved on behalf of the council of standards australia on 14 december 2004 and on behalf of the council of standards new zealand on 17 december 2004 this standard was published on 22 march 2005 the following are represented on committee tm 006 a3p australian pesticides and veterinary medicines authority consumers federation of australia csiro forestry and forest products department of primary industries and fisheries engineers australia forests new south wales glued laminated timber association of australia housing industry association australia losp treated timber association new zealand forest research institute new zealand timber industry federation new zealand timber preservation council plywood association of australasia timber preservers association of australasia timber promotion council additional interests dr harry greaves keeping standards up to date standards are living documents which reflect progress in science technology and systems to maintain their currency all standards are periodically reviewed and new editions are published between editions amendments may be issued standards may also be withdrawn it is important that readers assure themselves they are using a current standard which should include any amendments which may have been published since the standard was purchased detailed information about joint australian new zealand standards can be found by visiting the standards web shop at au or standards new zealand web site at www standards co nz and looking up the relevant standard in the on line catalogue alternatively both organizations publish an annual printed catalogue with full details of all current standards for more frequent listings or notification of revisions amendments and withdrawals standards australia and standards new zealand offer a number of update options for information about these services users should contact their respective national standards organization we also welcome suggestions for improvement in our standards and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities please address your comments to the chief executive of either standards australia or standards new zealand at the address shown on the back cover this standard was issued in draft form for comment as dr 03440 accessed by tafe queensland institutes on 19 dec 2007 as nzs 1604 5 2005 incorporating amendment no 1 australian new zealand standard specification for preservative treatment part 5 glued laminated timber products copyright standards australia standards new zealand all rights are reserved no part of this work may be reproduced or copied in any form or by any means electronic or mechanical including photocopying without the written permission of the publisher jointly published by standards australia gpo box 476 sydney nsw 2001 and standards new zealand private bag 2439 wellington 6020 isbn 0 7337 6491 6 originated as as nzs 1604 5 2002 second edition 2005 reissued incorporating amendment no 1 july 2006 accessed by tafe queensland institutes on 19 dec 2007 as nzs 1604 5 2005 2 preface this standard was prepared by the joint standards australia standards new zealand committee tm 6 timber preservation and durability to supersede as nzs 1604 5 2002 this standard incorporates amendment no 1 july 2006 the changes required by the amendment are indicated in the text by a marginal bar and amendment number against the clause note table figure or part thereof affected the objective of this standard is to specify requirements for preservative treatment of glued laminated timber products for protection against decay or insect attack the objectives of this revision are to a include requirements for seasoned softwood framing to be used south of the tropic of capricorn in hazard class h2 exposure conditions section 3 and b amend the requirements for tributyltin naphthenate based preservatives used in structural products in hazard class h3 exposure conditions this standard does not specify the methods of preservative treatment that may be adopted to achieve the specified penetrations and retentions where the user is uncertain of the appropriate preservative treatment additional information may be obtained from state territory or federal forestry authorities or traders associations this standard is the third part in as nzs 1604 a series of standards that covers specification for preservative treatment of timber products as follows as 1604 specification for preservative treatment as 1604 1 part 1 sawn and round timber as nzs 1604 2 part 2 reconstituted wood based products as nzs 1604 3 part 3 plywood as nzs 1604 4 part 4 laminated veneer lumber lvl as nzs 1604 5 part 5 glued laminated timber products this standard preservatives not covered in this edition and which may have general application should be brought to the attention of standards australia for consideration for inclusion in future editions of this standard warning important safety notice improper use of the preservative chemicals and treated products may be hazardous all individuals involved in the production or testing of treated products should be familiar with the relevant material safety data sheets consumer information sheets dealing with the appropriate use and handling of treated products should be provided as the point of sale literature cca treated timber should not be used for food preparation surfaces nor in storage units or containers where the foodstuffs will be in direct contact with the treated timber surface for the purpose of user friendliness the following colour page coding is used to differentiate between the four hazard classes i orange hazard class selection guide ii yellow hazard class h1 iii blue hazard class h2 iv pink hazard class h3 v green hazard class h4 accessed by tafe queensland institutes on 19 dec 2007 3 as nzs 1604 5 2005 statements expressed in mandatory terms in notes to tables are deemed to be an integral part of this standard the terms normative and informative have been used in this standard to define the application of the appendix to which they apply a normative appendix is an integral part of a standard whereas an informative appendix is only for information and guidance accessed by tafe queensland institutes on 19 dec 2007 as nzs 1604 5 2005 4 contents page foreword 5 section 1 scope and general 1 1 scope 6 1 2 application 6 1 3 referenced documents 6 1 4 definitions 7 1 5 timber preservatives 8 1 6 product requirements 9 1 7 selection of hazard class 9 1 8 preservative treatment 11 1 9 use in new zealand 12 section 2 hazard class h1 2 1 general 13 2 2 preservative penetration requirement 13 2 3 preservative retention requirement 13 section 3 hazard class h2 3 1 general 15 3 2 preservative penetration requirement 15 3 3 preservative retention requirement 16 section 4 hazard class h3 4 1 general 17 4 2 preservative penetration requirement 17 4 3 preservative retention requirement 18 4 4 use of tbtn and tbto 18 section 5 hazard class h4 5 1 general 21 5 2 preservative penetration requirement 21 5 3 preservative retention requirement 21 section 6 marking 6 1 legible marking 22 6 2 marking information 22 6 3 layout of brands 22 6 4 advisory label envelope penetration 23 6 5 compliance testing 23 appendices a guide to hazard classifications for various end use applications 24 b method of selection and preparation of test specimen 25 accessed by tafe queensland institutes on 19 dec 2007 5 as nzs 1604 5 2005 foreword the purpose of preservation is to extend the life of the glued laminated timber product by protecting it from decay or insect attack this increases the range of the end application of the glued laminated timber products and renders it a more useful and reliable material for construction building and engineering purposes the service life of the glued laminated timber product depends on a variety of factors these include the natural durability of the timber species the degree of preservative treatment and the range of hazards and type of environment anticipated during the service life of the product in addition the severity of exposure can be reduced by alternative design regular inspection and maintenance procedures will assist in minimizing the effects of exposure in all conditions of use the non durable timber component of the glued laminated timber products can be made durable by correct preservative treatment service life may depend upon the glued laminated timber products having been ripped cross cut shaped bored machined or having had any such operations or processes carried out prior to preservative treatment where subsequent machining is unavoidable supplementary protection should be applied to the cut surface however this protection cannot be expected to be as effective as the original recommended treatment accessed by tafe queensland institutes on 19 dec 2007 as nzs 1604 5 2005 6 copyright standards australia standards new zealand australian new zealand standard specification for preservative treatment part 5 glued laminated timber products s e c t i o n 1 s c o p e a n d g e n e r a l 1 1 scope this standard sets out a specification for preservative treatment of glued laminated timber products it specifies the preservative penetration pattern and the preservative retention requirements suitable for each hazard class see table 1 this standard does not cover grade or seasoning condition 1 2 application this standard in conjunction with as 1604 1 and as nzs 1605 is intended for application throughout australia and new zealand notes 1 this standard does not apply to finger jointed material except where finger jointed laminates are used to fabricate glued laminated timber products in any other case the specifications in as 1604 1 apply 2 in queensland the timber utilisation and marketing act 1987 and in new south wales the timber marketing act 1977 require approval of a preservative treatment and registration of a brand before timber offered for sale in either of these states can be described as preservative treated detailed information about requirements of such legislation may be obtained from the state territory or federation forestry authorities or traders associations 3 where products are to be treated to comply with the requirements of this standard timber treaters should select suitable timber material to ensure that the finished product can be penetrated to the depth required for each hazard class 4 where a timber species treatment properties are not known trial samples placed into a normal charge process should give indications of the timber s treatability these indications should serve as a guide for the treater in addition the following references set down the treatment properties of some well known commercial timbers of the world a bs en 350 2 see clause 1 3 b keating w g bolza characteristics and uses of timber vol 1 s e asia northern australia and the pacific inkata press melbourne 1982 1 3 referenced documents as 1604 specification for preservative treatment 1604 1 sawn and round timber 5604 timber natural durability ratings as nzs 1328 glued laminated structural timber 1328 1 part 1 performance requirements and minimum production requirements accessed by tafe queensland institutes on 19 dec 2007 7 as nzs 1604 5 2005 copyright as nzs 1605 methods for sampling and analysing timber preservatives and preservative treated timber 4491 timber glossary of terms in timber related standards nzs 3602 timber and wood based products for use in building 3640 chemical preservation of round and sawn timber bs en 350 durability of wood and wood based products natural durability of solid wood en 350 2 part 2 guide to natural durability and treatability of selected wood species of importance in europe new zealand building code 1 4 definitions for the purpose of this standard the definitions given in as nzs 4491 and those below apply where the definitions below differ from those in as nzs 4491 those below apply 1 4 1 brand a legible mark applied to preservative treated glued laminated timber products sufficiently permanent to convey the information specified in section 6 until the product is used in construction 1 4 2 envelope treatment a continuous envelope of preservative around the glued laminated timber products to the depth specified for each hazard class as described in clauses 3 2 2 b i 3 2 2 c i 4 2 2 b i 4 2 2 c i 5 2 2 b i and 5 2 2 c i note the penetration requirements specified in all hazard classes have been derived using the best information available at the time of preparation of this standard 1 4 3 exposed sapwood in any laminate sapwood that appears on at least two adjacent exposed surfaces other than the ends note some examples are given in figure 1 figure 1 examples of exposed and unexposed sapwood accessed by tafe queensland institutes on 19 dec 2007 as nzs 1604 5 2005 8 copyright 1 4 4 glued laminated timber product a product member formed by bonding together timber laminations with the grain running essentially parallel to the product s longitudinal axis 1 4 5 hazard class a number prefixed with the letter h identifying the degree of hazard as prescribed in this standard for which the glued laminated timber products incorporating the brand have been treated e g h2 note see appendix a for information on hazard classifications for various end use applications 1 4 6 laminate a timber element used to form glued laminated timber which may be a single unit or may be formed from several pieces of timber that may be end jointed or edge jointed or both so as to extend the full width and length of the glued laminated timber member 1 4 7 parcel a lot of preservative treated glued laminated timber products from one or more charges or part thereof of the same treatment type 1 4 8 penetration the depth to which a prescribed preservative has penetrated the timber 1 4 9 penetration zone the zone of the glued laminated timber products required to be penetrated by the preservative 1 4 10 preservative a chemical or a mixture of chemicals in a suitable form for use in the production of glued laminated wood product in order to preserve them from attack by timber destroying agents a description of some preservatives for use in this standard is given in as 1604 1 1 4 11 preservative number a number allocated to identify a particular preservative note see as 1604 1 for preservative numbers 1 4 12 preservative treatment plant number a number allocated to a particular treatment plant listed in a register published for that purpose for identifying timber treated at that plant note see as 1604 1 for preservative plant numbers 1 4 13 retention the quantity of preservative in the penetration zone specified for a particular hazard class 1 4 14 treater any organization treating glued laminated timber products in accordance with this standard 1 5 timber preservatives unless otherwise specified in this standard an approved preservative used for the treatment of glued laminated timber products shall comply with the requirements of as 1604 1 for the composition of preservative and with the requirements in this standard for the retention appropriate for the required hazard class treatment accessed by tafe queensland institutes on 19 dec 2007 9 as nzs 1604 5 2005 copyright 1 6 product requirements glued laminated timber shall be manufactured in accordance with as 1328 1 using a type i or ii adhesive as appropriate for the hazard class of end uses 1 7 selection of hazard class four hazard classifications are described in this standard each is denoted by a hazard class and is defined in terms of specific service exposures as set out in table 1 the hazard class appropriate to the proposed end use of the glued laminated timber products shall be selected having regard to the exposure conditions as listed in table 1 note for the purpose of user friendliness the following colour page coding is used to differentiate between the four hazard classes a orange hazard class selection guide b yellow hazard class h1 c blue hazard class h2 d pink hazard class h3 e green hazard class h4 accessed by tafe queensland institutes on 19 dec 2007 as nzs 1604 5 2005 10 notes accessed by tafe queensland institutes on 19 dec 2007 11 as nzs 1604 5 2005 copyright table 1 hazard class selection guide hazard class service class exposure specific service conditions biological hazard typical uses h1 1 inside above ground completely protected from the weather and well ventilated and protected from termites lyctid borers interior beams staircases h2 2 inside above ground protected from wetting nil leaching borers and termites interior beams framing staircases h3 2 outside above ground subject to periodic moderate wetting and leaching moderate decay borers and termites exterior beams posts h4 3 outside in ground subject to severe wetting and leaching severe decay borers and termites light standards this column refers to service classes as defined in as nzs 1328 1 and encompasses both service exposure conditions in terms of temperature and relative humidity and adhesive types notes 1 examples shown in this table are not exhaustive reference should be made to table a1 in appendix a 2 it is recommended that specifiers nominate the minimum hazard class level appropriate to the specific exposure and service conditions 1 8 preservative treatment 1 8 1 general preservative treated glued laminated timber products that are claimed to comply with this standard shall contain for each hazard class the specified penetration and retention of preservative as listed in this standard 1 8