Timber Treatment: Summary information from …

1 Timber TreatmentSummary information from NZS 3602: 2003 Timber and Wood-based Products for Use in BuildingT I M B E R T R E AT M E N T g uIdE oNly. REfE R To Nz s 3 6 0 2 : 2 0 0 3 f oR f u l l R Eq uI R E M E N Ts 0 INTR oducTIoN0 sAfETy ANd HEAlTH02 HAzARd clAssIfIcATIoNs 02 BR ANdINg03 I dENTIf yINg TI MBER TR EATM ENTs0 4 ExAMplEs of TI MBER TR EATM ENT 0 BuIldINg coMpoN ENTs ANd TR EATM ENT 2 MoR E INfoR MATIoNThis document has been prepared by the Department of Building and Housing (the Department) as guidance information in accordance with section 175 of the Building Act 2004. It is intended as guidance only, and is not specific to any particular Document is not a substitute for professional advice.

2 While the Department has taken care in preparing this document, it should not be relied upon as establishing compliance with all the relevant requirements of the Building Act or the Building Code in all cases that may document is not a Compliance Document and may be updated from time to time. The latest version is available from the Department s website ( ).This document is based on the New Zealand Standard NZS 3602: 2003 Timber and Wood-based Products for Use in Building. If further amendments are made to NZS 3602, information in this document may become out of N T Ro du c T I o N This booklet is a Summary of the New Zealand Standard NZS 3602: 2003 Part 1 Timber and Wood-based Products for Use in Building.

3 It explains some of the information in NZS 3602: 2003 on common uses of treated Radiata pine and Douglas fir in NZS 3602: 2003 Part 1 is cited in Acceptable Solution B2/AS1 for meeting the requirements of Building Code Clause B2 Durability. To find out more about the Building Code and Acceptable Solutions visit the Department of Building and Housing website ( ).This booklet is not a substitute for the complete Standard. Designers and specifiers should acquire the Standard for complete 3602: 2003 is available from Standards New Zealand by calling 0800 735 note that the Timber treatment levels in this booklet are a minimum you may use a higher level of treatment if you E T y A N d H E A lT HTimber treatments consist of chemicals that may be harmful.

4 Important measures to take when using treated Timber are: reduce contact by wearing gloves, goggles and a dust mask don t burn off-cuts or cook with them dispose of waste in an approved landfill wash your hands before using the toilet, smoking or eating wash work clothes separately ventilate work spaces as much as you can working with solvent damp Timber is not advised, solvent damp Timber should be allowed to properly dry off before Note: For other commonly used timbers, refer to NZS 3602: g uIdE oNly. REfE R To Nz s 3 6 0 2 : 2 0 0 3 f oR f u l l R Eq uI R E M E N Ts T I M B E R T R E AT M E N T T I M B E R T R E AT M E N T g uIdE oNly.

5 REfE R To Nz s 3 6 0 2 : 2 0 0 3 f oR f u l l R Eq uI R E M E N Ts 3 CCA oxide01 CCA salt02 Boron11 TBTO56 Copper naphthenate57 Copper azole58 TBTN62 IPBC63 Propiconazole + tebuconazole64 Permethrin70 Alkaline copper quaternary90H A z A R d c l As s I f I cAT I o N s(See NZS 3640: 2003 for more information )HAzA Rd c lAs sE x p o s uR Es E RvIcE c oNdI T IoNsBIologIcAl HAzARd T y pIcAl u sEsH . Protected from the weather, above ground Protected from the weather, always dryBorerInterior finishing Timber see NZS 3602H .2 Protected from the weather, above ground, but with a possibility of exposure to moistureProtected from weather, but with a risk of moisture content conducive to decayDecay fungi and borerWall framing see NZS 3602H3 (As/Nzs 604)Exposed to the weather, above groundPeriodic wetting, not in contact with the groundDecay fungi and borerPlywood see NZS 3602H3.

6 Exposed to the weather, above groundPeriodic wetting, not in contact with the groundDecay fungi and borerCladding, fascia, joinery see NZS to the weather, above ground or protected from the weather but with a risk of moisture entrapmentPeriodic wetting, not in contact with the ground, more critical end usesDecay fungi and borerDecks, pergolas, external beams, posts not in groundH4 Exposed to the weather, in ground or in fresh waterGround contact, or conditions of severe or continuous wettingDecay fungi and borerFence posts, landscaping timbers not requiring a building consentH5 Exposed to the weather, in ground or in fresh waterGround contact, or conditions of severe or continuous wetting, where uses are critical and where a higher level of protection than H4 is requiredDecay fungi and borerHouse piles and poles, crib walling, posts in ground for decks, verandas, pergolasI d EN T I f y I N g T I M B E R T R E AT M EN Ts(See NZS 3640: 2003 for more information )HAzA Rd c lAs sME T Ho d s o f IdE N T IfIcAT IoNH.

7 End brandingH .2 Permethrin plus TBTO, TBTN or IPBCBlueBoronPinkH3 (As/Nzs 604)Face brandingH3. framing shall be face branded along the length at 1500 mm centres only on its face or added colour or, if coloured green, the colour is to be distinctly different from the green of the preservative treatment (colour green 368 ). added colour, the natural colour of treated Timber is varying shades of R A N d I N gThe brand shall identify:(a) the plant responsible for preservative treatment of the Timber by means of a plant number or trade name(b) the preservative type using the following code numbers:(c) the hazard class for which the Timber has been treated(d) Woodmark (optional).

8 The sequence of the information in the brand shall be (a) plant number, (b) preservative code number, and (c) hazard class number, as in the example.(a) plant number (b) preservative code(c) hazard class (d) optional Woodmark 665 62 g uIdE oNly. REfE R To Nz s 3 6 0 2 : 2 0 0 3 f oR f u l l R Eq uI R E M E N Ts T I M B E R T R E AT M E N T T I M B E R T R E AT M E N T g uIdE oNly. REfE R To Nz s 3 6 0 2 : 2 0 0 3 f oR f u l l R Eq uI R E M E N Ts 5E x A M pl Es o f T I M B E R T R E AT M EN TThese drawings are not intended as construction drawings. They illustrate some of the requirements of NZS 3602: 2003 only.

9 * Untreated Douglas fir and untreated kiln dried and planer gauged Radiata pine may also be wall framing and boundary *intermediatefloor joist protected by boundary wall wall supportingenclosedbalconyfigure 2: Enclosed balcony supported by posts and beamsfigure : Enclosed balcony supported by framed wall opening beam or lintel and groundorH5posts when embeddedin ground6 g uIdE oNly. REfE R To Nz s 3 6 0 2 : 2 0 0 3 f oR f u l l R Eq uI R E M E N Ts T I M B E R T R E AT M E N T T I M B E R T R E AT M E N T g uIdE oNly. REfE R To Nz s 3 6 0 2 : 2 0 0 3 f oR f u l l R Eq uI R E M E N Ts wall framing and wall framingNote: Inside/balconyshown level for simplicity.

10 E2/AS1requires step down to outside waterproofing 4: Enclosed balcony cantilevered joistfigure 5: Enclosed flat roof framing (less than 00)E x A M pl Es o f T I M B E R T R E AT M EN TThese drawings are not intended as construction drawings. They illustrate some of the requirements of NZS 3602: 2003 only. roof framing greater than 10 gutter wall *intermediatefloor joist protected by boundary joist* Untreated Douglas fir and untreated kiln dried and planer gauged Radiata pine may also be used Note: Where there are no boundary joists joists must be 3: parapet and exterior flatroof/skillionframing less than 10 wall framingH5piles g uIdE oNly.