Tanalised Treated Timber 47 x 75mm 2.4m – 3×2 Timber
Tanalised Treated Timber 47 x 75mm 2.4m is a practical and versatile timber section suitable for numerous building, landscaping and outdoor woodworking projects. Commonly referred to by builders and tradespeople as 3×2 timber, it combines a manageable 47 x 75mm nominal section with a convenient 2.4-metre length.
The 3×2 size is a popular choice for lightweight frameworks, garden structures, supports, bracing and general construction. Its compact dimensions make it easier to handle and cut than larger timber sections, while still providing a useful size for many professional and DIY projects.
This timber has been pressure treated, commonly described as tanalised, to improve its durability. The treatment helps protect the wood against fungal decay and attacks from wood-destroying insects, making it suitable for many outdoor and moisture-prone applications.
Product Dimensions
The nominal dimensions of this timber are:
- Thickness: 47mm
- Width: 75mm
- Length: 2.4m
- Common imperial name: 3×2
- Finish: Tanalised or pressure treated
The term 3×2 timber is the traditional imperial trade name used for this section. The supplied metric dimensions are approximately 47 x 75mm after processing.
Timber dimensions should be regarded as nominal rather than guaranteed finished measurements. The exact size can vary slightly because of machining, pressure treatment, moisture content and natural timber movement. Check each piece before starting any work where precise dimensions are essential.
What Is Tanalised Timber?
Tanalised timber has undergone a controlled pressure-treatment process. During treatment, the timber is placed inside a specialist vessel, where preservative is driven into the wood under pressure.
This process provides more effective protection than a simple preservative applied only to the surface. It helps the timber resist fungal decay and wood-destroying insects, potentially extending its service life when it is installed correctly and used in an appropriate environment.
Pressure-treated timber is not completely waterproof or maintenance-free. Good installation practices remain important. Provide suitable drainage and ventilation, avoid trapping moisture against the wood and protect any newly exposed surfaces after cutting, drilling or notching.
Common Uses for 3×2 Treated Timber
The manageable 47 x 75mm section makes this timber suitable for many professional and DIY applications. Typical uses may include:
- Lightweight outdoor frameworks
- Garden structures and supports
- Trellis frames and screening
- Fencing components and repairs
- Shed construction and maintenance
- Raised beds and planter frames
- Timber bracing and noggins
- Landscaping features
- Workshop and agricultural projects
- General carpentry and joinery
- Repair and replacement work
- Projects requiring a traditional 3×2 section
The 2.4m length is convenient to transport, store and manoeuvre. It is particularly suitable for smaller projects, repairs and installations where longer sections would create unnecessary waste.
This length can also be cut into several shorter components, making it practical for frames, supports and repeated sections. Measuring and planning the required cuts beforehand can help make efficient use of the timber.
Suitability will depend on the design, installation method, expected loads and environment. If the timber will be used for a structural or load-bearing purpose, confirm that it carries an appropriate strength grade.
Pressure-treated timber is not automatically classified as C16, C24 or another structural grade unless it is specifically marked and sold as such. Structural loads, spans, fixings and support requirements should be determined by a suitably competent person.
Benefits of Pressure-Treated Timber
Outdoor timber may be exposed to rain, moisture, insects and changing temperatures. Pressure treatment improves the wood’s resistance to biological deterioration and makes it suitable for a broad range of exterior projects.
The principal benefits include:
- Commonly known as 3×2 timber
- Convenient 2.4-metre length
- Manageable 47 x 75mm nominal section
- Improved resistance to fungal decay
- Protection against wood-destroying insects
- Suitable for many outdoor applications
- Longer potential service life than untreated timber
- Suitable for professional and DIY projects
- Easy to handle, measure and cut
- Useful for framing, bracing and repairs
The required treatment specification will vary depending on where and how the timber is used. Timber intended for an above-ground application may have a different treatment classification from timber designed for permanent ground contact.
If the timber will be installed directly against soil, placed in continuously wet conditions or used in a particularly demanding location, confirm that its treatment or use class is suitable before installation.
Natural Appearance and Variations
Timber is a natural product, meaning every length will have its own appearance. Variations in colour, grain pattern and surface texture are normal. Individual pieces may feature knots, resin pockets, minor splits, wane, treatment marks and other naturally occurring characteristics.
Freshly treated timber may have a green or light brown tint, depending on the timber species and preservative used. The colour will usually soften and change as the wood is exposed to daylight and weather.
Changes in moisture content may cause timber to expand, contract, twist or develop small surface checks. These characteristics are normal in natural wood and do not necessarily affect its suitability for the intended application.
Please note that colours, sizes and finishes can vary slightly due to manufacturing and pressure-treatment processes. Product photographs should therefore be considered representative, as the supplied timber may not look exactly the same as the piece shown.
Cutting and Installation
This 2.4m timber can be cut using suitable woodworking tools. Measure carefully and ensure that the timber is correctly supported before cutting to improve accuracy and reduce movement.
Cutting, drilling or notching can expose internal areas that may not contain the same level of preservative as the original treated surfaces. Apply an appropriate cut-end or end-grain timber preservative to all newly exposed areas, following the manufacturer’s instructions.
Use fixings compatible with pressure-treated timber and suitable for the intended environment. Galvanised or stainless-steel screws and nails are commonly selected for exterior projects because unsuitable metal fixings may corrode or cause staining.
Wear suitable gloves, eye protection and a dust mask while cutting or drilling. Work in a well-ventilated area, wash your hands after handling the timber and dispose of offcuts responsibly. Pressure-treated timber should never be burned.
Storage and Maintenance
Before installation, store the timber flat, evenly supported and raised clear of the ground. Protect it from prolonged exposure to heavy rain while allowing sufficient air circulation.
Once installed, the timber may be allowed to weather naturally or finished using a compatible exterior wood paint, oil or stain. Freshly treated or damp wood should be allowed to dry sufficiently before a decorative coating is applied.
Inspect completed outdoor projects periodically for loose fixings, trapped moisture, exposed cut surfaces and damage to any protective coating. Prompt maintenance can help preserve both the timber and the finished project.
Tanalised Treated Timber 47 x 75mm 2.4m provides a convenient and adaptable 3×2 section for numerous garden, landscaping and general construction projects. Its pressure-treated finish offers improved durability compared with untreated wood, while its manageable 2.4m length makes it easy to transport, store and install.
Always inspect the actual dimensions, condition, treatment specification and strength grade before installation. Seek professional advice for structural or load-bearing projects to ensure the timber and proposed design are suitable.
