HYNE TIMBER T3 Green Treated Timber Framing Installation Guide
- June 2, 2024
- HYNE TIMBER
Table of Contents
HYNE TIMBER T3 Green Treated Timber Framing
Specifications
- Timber Species: Responsible Wood and PEFC Chain of Custody Certified Australian plantation-grown softwood
- Sizes: Up to 240mm width, up to 45mm thickness, up to 6m length
- Grades: F5, MGP10, MGP12 structural grades
- Strength & Stiffness: Compliant with AS 1720.1 Timber structures Design methods for the nominated grade
Product Description
Hyne Timber T3 Green is designed to resist termite action and above-ground decay in Australian buildings. It is termite resistant, fungal resistant, and has no VOC emissions. The product is suitable for external and internal, above-ground applications including deck joists, pergola rafters, and wet-area wall framing.
Installation Requirements
When installed according to the provided requirements, T3 Green can be used with other building materials/systems to meet the performance requirements of the National Construction Code Building Code of Australia (BCA).
Appearance
The surface of T3 Green is lightly coloured to provide an even green appearance, distinguishing it from other timber products. It is different from T2 Blue and T2 Red, which are for dry, above-ground applications only.
Certification
T3 Green is manufactured from Responsible Wood and PEFC Chain of Custody Certified Australian plantation-grown softwood, meeting the product requirements defined in AS/NZS 1748.1 Timber – Solid – Stress-Graded for Structural Purposes General Requirements.
Product Usage Instructions
- Ensure the installation area meets the specified requirements.
- Follow the guidelines for cutting and handling the timber.
- Install T3 Green according to the recommended methods to ensure termite protection and decay resistance.
- Avoid full loading during construction until the product stabilizes in service.
Durability
T3 Green provides sufficient termite protection and decay resistance when used as per the provided guidelines. The durability of the product is maintained when installed correctly.
Product Performance and Requirements
T3 Green meets the BCA performance requirements related to structural reliability, resistance, stability, and actions. Building design using T3 Green should comply with AS 1720.1, AS 1684, and AS 3660 standards.
FAQ
- What are the primary applications for Hyne Timber T3 Green?
- T3 Green is suitable for use in external and internal above-ground applications like deck joists, pergola rafters, and wet-area wall framing.
PERFORMANCE STATEMENT
Hyne Timber T3 Green has been
designed and manufactured to resist termite action and above-ground decay in
Australian buildings. It has also been designed to eliminate VOC’s and have a
very low odour. When installed in accordance with the requirements herein, T3
Green can be used in conjunction with other building materials/systems to
resist termite action and decay and meet the performance requirements of the
National Construction Code Building Code of Australia (BCA).
Intended Use
Hyne Timber T3 Green products are suitable for use in buildings in external
and internal, above-ground applications in Australia. Typically, this may
include: deck joists, pergola rafters and wet-area wall framing.
PRODUCT DESCRIPTION
Appearance
The surface of T3 Green is lightly coloured to give an even green colour,
which differentiates this product from non-treated timber products, and from
other treated timbers, like Hyne Timber T2 Blue and T2 Red (both of which are
intended for use in dry, above ground applications only).
Certification
T3 Green is a CodeMark® Australia certified product, meaning that it has been
independently audited for compliance against the performance requirements of
BCA, relating to structural reliability, stability and resistance to actions.
CodeMark® Australia certification ensures product acceptance by building
certifiers.
Timber Species
T3 Green is manufactured from Responsible Wood and PEFC Chain of Custody
Certified Australian plantation-grown softwood: including Radiata Pine, Slash
Pine, Caribbean Pine & hybrids of Slash/Caribbean Pine.
Sizes
- Width : Up to 240mm
- Thickness: Up to 45mm
- Length: Up to 6m
Grades
T3 Green is available in F5, MGP10 and MGP12 structural grades. These grades
are manufactured to meet the product requirements defined in AS/NZS 1748.1
“Timber – Solid – Stress-Graded for Structural Purposes General Requirements”.
Strength & Stiffness
T3 Green has the structural properties defined in AS 1720.1 “Timber structures
Design methods” for the nominated grade. Please note that immediately
following preservation or on-site wetting, the strength and stiffness of this
product may reduce slightly. Avoid full loading during the construction period
and until in-service stabilisation has occurred.
Durability
T3 Green has been designed to resist all termite species in Australia and to
resist above-ground fungal organisms which can cause decay. The preservatives
used have satisfied test protocols, defined by the Australian Wood
Preservation Committee. This product also meets the preservation requirements
of AS 1604.1 “Specification for Preservative Treatment – Sawn and Round
Timber”.
Product Identification
T3 Green products are individually marked to include the product name, the AS
1604.1 brand and the CodeMark® Australia certification number. Product
packaging is marked with a pack card that describes the product and its
certification.
PRODUCT PERFORMANCE AND REQUIREMENTS
Building Performance Requirements
When designed, installed, used and maintained in accordance with the
requirements herein; T3 Green will provide sufficient termite protection and
decay resistance for the building to meet the BCA performance requirements.
i.e.
Building Design Requirements VOLUME ONE
The structural and durability design of buildings using T3 Green shall comply with the principles and requirements defined in AS 1720.1, AS 1684 and AS 3660. Two options for resisting termite action are:
- The use of termite-resistant materials as primary building elements, and/or
- The use of termite barrier systems.
T3 Green is a termite-resistant material and may be used solely, or in
conjunction with, other termite-resistant materials to resist termite actions
and satisfy the BCA performance requirements. Where all primary building
elements are not designed, specified and installed as termite resistant; then
a termite barrier system shall be used. Where primary building elements, other
than T3 Green, are also used in a building then the BCA structural provisions
relating to termite action shall be met. e.g. AS 3660.1 “Termite Management –
New Building Work”.
Building Practice Requirements
SITE TREATMENT
T3 Green shall be installed, stored and maintained by the building practice
requirements of AS 1684 “Residential Timber-Framed Construction.” The
resistance of T3 Green to termites and decay may be affected by: end trimming,
notching, trenching or drilling of holes. Suitable brush-on or spray-on
preservative treatments for T3 Green are recommended below.
- Protim® Solignum® XJ Clear (See Figure 1)
- Tanalised® Enseal Clear or Ecoseal (See Figure 2)
These products contain insecticides and fungicides, which with the correct application will protect any: end trims, notching, trenching or drill holes.
SITE CONDITIONING
The moisture content and dimensional tolerance requirements of
AS/NZS1748.1 may be exceeded immediately following preservative treatment
and/or wet weather conditions and can be expected to return to equilibrium
within a few weeks of dry conditions. Due allowance shall be made for an
elevated moisture content and some minor swelling. The guidance in Appendix E
“Moisture Content and Shrinkage” of AS 1684.2 “Residential Timber-Framed
Construction” is applicable. Swelling of up to 4% over the nominal product
width may occur, and due allowance, particularly in very wide sections, should
be made. Allowing for shrinkage is particularly critical where T3 Green is
used in conjunction with seasoned timber members.
ALLOWANCE FOR SHRINKAGE IN T3 GREEN
FIXING
Corrosion resistant fasteners, fixings, and connectors such as, hot-dip
galvanised or stainless steel must be used in all applications.
PRODUCT FINISHING
Where used in outdoor environments and/or exposed to ultraviolet light, T3
Green must be sealed with a suitable timber paint or stain coating (Cabot’s
Timbercolour, Intergrain NaturalStain or a suitable equivalent) to maintain
optimum serviceability, appearance and dimensional stability. All surfaces
must be adequately coated to ensure the timber is protected from the elements.
Ensure T3 Green is clean and dry before applying any coating products, and
that the coating manufacturer’s instructions are followed carefully. Coatings
must be maintained as per the instructions of the coating manufacturer –
particularly when subject to harsh environmental conditions.
OVERVIEW
This manual details the installation requirements for Green. It is intended for use by building designers, builders, carpenters, other trades persons and building certifiers responsible for ensuring that buildings manufactured from T3 Green can resist the action of termites and decay, by the relevant performance requirements of the National Construction Code Building Code of Australia (BCA)
GUIDELINES
Safety
T3 Green is safe to use. A Safety Data Sheet (SDS) is available at
www.hyne.com.au. Take standard precautions against wood dust e.g. wear dust-
proof goggles, leather or cotton gloves, and a class P1 respirator if
generating dust from cutting or sanding.
Storage and On-Site Protection
T3 Green is both termite and decay-resistant and can resist weather exposure
for short periods without aesthetic deterioration. The product is not designed
to resist in-ground decay-causing fungi and therefore it should be stored in
dry conditions above the ground, after delivery and prior to use. Exposure to
ground based decay may cause deterioration and negate the termite resistance
of the product.
Waste Disposal
You should be able to dispose of offcuts through normal trade waste collection
services. For large volumes, you should check with your local waste service
authority for disposal requirements.
ATE OF ISSUE: OCTOBER 2023 THIS DOCUMENT SUPERSEDES ALL PREVIOUS VERSIONS