Tanalised Treated Timber 47 x 75mm 3.0m – 3×2 Timber
Tanalised Treated Timber 47 x 75mm 3.0m is a practical pressure-treated softwood section suitable for outdoor construction, landscaping and general building projects. It is commonly referred to as 3×2 timber, based on its traditional approximate imperial dimensions of 3 inches by 2 inches.
The compact 47 x 75mm section is easy to handle and suitable for many light-to-medium-duty frameworks, garden structures and repair projects. Its convenient 3.0-metre length can be installed as supplied or cut into smaller components to meet the requirements of the job.
The timber has undergone a controlled pressure-treatment process to provide additional protection against fungal decay and wood-destroying insects. This treatment improves its durability compared with untreated softwood when the product is correctly specified, installed and maintained in a suitable environment.
Product dimensions
The nominal product dimensions are:
- Metric section: 47mm x 75mm
- Common imperial name: 3×2 timber
- Length: 3.0m
- Material: Treated softwood
- Treatment: Pressure treated or tanalised
- Suitable for: Building, landscaping and outdoor projects
The name 3×2 is a traditional trade description rather than an exact imperial conversion. The stated metric dimensions should be used when planning, measuring and cutting the timber.
What is tanalised timber?
Tanalised timber is softwood that has been treated with wood preservative using a controlled vacuum and pressure process. This encourages the treatment to penetrate deeper into the material than a standard surface-applied preservative.
The treatment helps protect the wood against fungal decay and attacks from wood-destroying insects. This makes treated softwood a practical material for many outdoor, exposed and moisture-prone applications.
Pressure treatment does not make timber completely waterproof or maintenance-free. The wood can still absorb and release moisture, which may result in natural movement, shrinkage, surface checking and colour changes.
Cutting, drilling or notching may expose internal timber that has not received the same level of treatment. Apply a compatible end-grain preservative to all freshly exposed surfaces during installation.
Common uses for 3×2 treated timber
The 47 x 75mm section is a versatile timber size for a range of garden, landscaping and general building projects.
Depending on its strength grade and the project specification, possible applications include:
- Lightweight outdoor frameworks
- Garden structures and features
- Shed frameworks and repairs
- Landscaping projects
- Timber supports and noggins
- Garden screens and dividers
- Agricultural and equestrian projects
- Raised garden features
- External carpentry and joinery
- General repair and maintenance work
- Bespoke outdoor structures
- Load-bearing applications where correctly graded
Where the timber is expected to carry structural loads, confirm that it has the correct strength classification. Tanalised timber should not automatically be assumed to be C16 or C24 unless the product is specifically marked and sold with that grade.
The required span, loading, support spacing, connections and fixing arrangement should be established by a suitably competent person where structural performance is required.
Benefits of the 3.0m length
The 3.0-metre length is convenient for a wide range of everyday building and garden projects. It is relatively easy to transport, store and move around a typical site.
The timber can be installed as a complete length or divided into several smaller components. Planning the cuts before work begins can help reduce waste and make efficient use of the available material.
Its manageable section and length make it suitable for both professional tradespeople and experienced DIY users. Timber weight will vary depending on moisture content, so appropriate handling procedures should still be followed.
Benefits of pressure-treated softwood
Using pressure-treated timber offers several advantages for appropriate outdoor applications:
- Additional protection against fungal decay
- Protection against wood-destroying insects
- Improved durability compared with untreated softwood
- Suitable for many external projects
- Useful for garden and landscaping construction
- Can be cut and worked using suitable tools
- Suitable for repairs and maintenance
- Practical for professional and DIY use
The treatment or use class must still be appropriate for the intended location. Timber installed in direct ground contact or exposed to persistent moisture may require a particular treatment specification.
Natural timber characteristics
Timber is a natural material, so every length will vary in grain pattern, shade, knots and surface texture. These differences are normal and contribute to the natural appearance of the wood.
Knots, resin pockets, minor splits and surface checking may be visible. These characteristics do not automatically indicate a defect, although their suitability will depend on the intended application and any applicable grading requirements.
Pressure treatment introduces moisture into the timber. As the wood dries, some natural shrinkage, twisting, bowing or cupping may occur. Suitable storage and installation can help manage this movement.
Newly treated timber may initially have a green or brown appearance depending on the preservative system used. Its colour will generally fade and weather gradually after outdoor installation.
Important sizing information
Please note: Timber dimensions are nominal and may vary slightly due to machining, pressure treatment, moisture content and the natural movement of the wood.
The common name 3×2 is an approximate imperial description rather than a guarantee of exact finished measurements. Customers requiring precise dimensions should check the timber before installation or contact us to confirm the current stock specification.
Allow the timber to acclimatise where appropriate before completing work requiring close-fitting joints or accurate measurements.
Cutting and installation
Use suitable woodworking tools fitted with sharp blades when cutting or drilling this timber. Wear protective gloves, eye protection and appropriate respiratory protection while handling, sawing or sanding treated wood.
Complete cutting work in a well-ventilated location and avoid breathing timber dust. Collect sawdust and offcuts for responsible disposal. Pressure-treated timber must not be burned on domestic fires, in wood-burning appliances or on garden bonfires.
Apply a suitable end-grain preservative to all cut ends, drilled holes and notches. Use corrosion-resistant fixings compatible with treated timber, particularly in external or regularly damp environments.
Where the timber forms part of a load-bearing structure, all supports, connections and fixings should follow the approved design and be suitable for the anticipated loads.
Storage and maintenance
Store the timber flat, raised off the ground and supported at suitable intervals. Protect it from prolonged saturation while allowing sufficient airflow around each length.
For visible outdoor projects, a compatible wood stain, oil or protective coating may be applied after the timber has dried sufficiently. Follow the coating manufacturer’s instructions regarding preparation and moisture content.
Inspect external timber periodically, paying particular attention to cut ends, joints, fixing points and areas where water could collect.
Key benefits
- Practical 47 x 75mm timber section
- Commonly known as 3×2 timber
- Convenient 3.0m length
- Pressure treated against decay and insects
- Suitable for outdoor frameworks and landscaping
- Useful for garden structures and repairs
- Easy to cut and handle
- More durable than untreated softwood
- Suitable for trade and DIY construction
- Versatile for general external building work
Tanalised Treated Timber 47 x 75mm 3.0m – 3×2 Timber is a practical choice for garden structures, lightweight frameworks, landscaping and general building projects. Always confirm its exact dimensions, treatment level and strength grade against the requirements of the intended application before installation.
