Overview of the Australian Standards

This document is an overview of the current Australian standards for Treated Finger Joint and or laminated timber products (i.e. Design Pine).

The following pages illustrate where and how these products can be used.

Design Pine is manufactured under strict production guidelines that ensure Design Pine meets the Australian Standards for its intended uses.


Structural Finger Joint / Laminated Products

Structural Finger Jointed (F7) - no laminate
Standard #: AS5068
Service Class 2 Service Class 3 - Design Pine
Finger Joint Adhesive: Type 1 or 2 Finger Joint Adhesive: Type 1
Structural Finger Jointed (GL8) - laminated
Standard #: AS/NZS 1328
Service Class 2 Service Class 3 - Design Pine
Finger Joint Adhesive: Type 1 or 2 Finger Joint Adhesive: Type 1
Laminate Adhesive: Type 1 or 2 Laminate Adhesive: Type 1
Non - Structural Finger Jointed
Standard #: AS5069
Type 1 Resorcinol, Phenol-resorcinol formaldehyde, Tannin formaldehyde
Type 2 Type 1 plus Melamine-urea formaldehyde
Note:
1. Type 2 can only be used provided the temperature remains below 50
2. These adhesives examples do not represent an exhaustive list, and are for guidance only
Adhesive Types
Standard #: AS/NZS 4364
Service Class 2 Service Class 3 - Design Pine
Finger Joint Adhesive: Finger Joint Adhesive:
Resorcinol, Phenol-resorcinol, Polyphenolic (tannins) Melamine-urea formaldehyde Polyurethanes Aqueous polymeric isocyanates Emulsion polymeric isocyanates Epoxies PVAc - Cross linked (D3) Resorcinol formaldehyde, Phenol-resorcinol formaldehyde, Tannin formaldehyde Melamine-urea formaldehyde Polyurethanes Aqueous polymeric isocyanates Emulsion polymeric isocyanates PVAc - Cross linked (D4)

Examples

Service Class 1: Interior furniture, mouldings

Service Class 2: Cladding, Fascia, Exterior painted mouldings, Exterior Doors

Service Class 3: Unpainted Outdoor Furniture, Unpainted Fascia, Trellis


This is an Extract from the Australian Standards (AS5068:2006)

Service Classes Definitions

Service Class 1 (SC1) = Interior

(Service Class 1 is characterised by a moisture content in the material corresponding to a temperature of 20oC and relative humidity of the surrounding air only exceeding 65% for a few weeks per year) NOTE: In Service Class 1 the average equilibrium moisture content is most softwoods will not exceed 12%

Service Class 2 (SC2) = Interior Humid, Exterior protected (outside under roof)

(Service Class 2 is characterised by a moisture content in the material corresponding to a temperature of 20oC and relative humidity of the surrounding air only exceeding 85% for a few weeks per year) NOTE: In Service Class 2 the average equilibrium moisture content is most softwoods will not exceed 20%

Service Class 3 (SC3) = External Exposed (outside fully exposed to weather)

(Service Class 3 is characterised by a climatic conditions leading to higher moisture content than Service Class 2, or where timber is directly exposed to sun and/or rain) NOTE: Figure 1 illustrates timber exposed to sun and rain


Service class Description Timber e.m.c Temperature
1 Interior Dry < 12% < 50oC
2 Interior Humid, Exterior Protected < 20% Any
3 Interior Hot and Humid
Exterior Exposed
>18% untreated timber
>20% multi salts treated softwood
Any

e.m.c = equilibrium moisture content: When subject to given conditions of humidity and Temperature, timber will reach an equilibrium moisture content (EMC), at which it neither gains nor loses moisture while