Tanalised Treated Timber 47 x 150mm 3.0m – 6×2 Timber
Tanalised Treated Timber 47 x 150mm 3.0m is a substantial pressure-treated softwood section suitable for outdoor construction, landscaping and general building projects. It is commonly referred to as 6×2 timber, based on its traditional approximate imperial dimensions of 6 inches by 2 inches.
The 150mm depth provides a larger and more substantial section than common 4×2 or 5×2 timber. Its convenient 3.0-metre length is easy to transport, store and manoeuvre while providing enough material for many garden, landscaping and building applications.
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 it is correctly specified, installed and maintained in a suitable environment.
Product dimensions
The nominal product dimensions are:
- Metric section: 47mm x 150mm
- Common imperial name: 6×2 timber
- Length: 3.0m
- Material: Treated softwood
- Treatment: Pressure treated or tanalised
- Suitable for: Building, landscaping and outdoor projects
The name 6×2 is a traditional trade description rather than an exact imperial conversion. Use the stated metric dimensions when planning, measuring and cutting the timber.
What is tanalised treated timber?
Tanalised timber is softwood that has been treated with wood preservative using a controlled vacuum and pressure process. This allows the treatment to penetrate deeper into the wood than a standard surface-applied preservative.
The treatment helps protect the timber against fungal decay and attacks from wood-destroying insects. It can extend the service life of the wood when it is correctly installed and used in a suitable external environment.
Pressure treatment does not make the timber completely waterproof or maintenance-free. The wood can still absorb and release moisture, resulting in natural movement, shrinkage, weathering, surface checking and gradual colour changes.
Cutting, drilling or notching can expose internal timber that may not have received the same level of protection. Apply a compatible end-grain wood preservative to all freshly exposed areas during installation.
Common uses for 6×2 treated timber
The 47 x 150mm section is suitable for a broad range of outdoor, landscaping and general building projects.
Depending on its strength grade and the project specification, potential applications include:
- Outdoor timber frameworks
- Garden sheds and buildings
- Landscaping projects
- Timber supports and bearers
- Agricultural and equestrian structures
- Raised garden features
- External carpentry and joinery
- General building work
- Bespoke outdoor structures
- Repairs to existing timber frameworks
- Load-bearing members where correctly graded
- Garden and DIY construction
Where structural performance is required, confirm that the timber has the appropriate 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 for structural applications.
Benefits of the 3.0m length
The 3.0-metre length is a practical choice for many everyday building, landscaping and garden projects. It is easier to transport, store and move around a typical site than longer timber lengths.
The product can be installed as a complete length or cut into multiple shorter components. Preparing a cutting plan before beginning work can help minimise waste and make efficient use of each piece.
Its manageable length makes it suitable for professional tradespeople and experienced DIY users. The weight of the timber will vary depending on its moisture content, so appropriate lifting and handling procedures should still be followed.
Benefits of pressure-treated softwood
Pressure-treated timber provides several advantages for appropriate outdoor applications:
- Additional protection against fungal decay
- Protection against wood-destroying insects
- Greater durability than untreated softwood
- Suitable for many external projects
- Useful for landscaping and garden construction
- Can be cut and worked with suitable tools
- Practical for repair and maintenance projects
- Suitable for professional and DIY use
The correct treatment or use class must still be selected for the intended environment. Timber installed in direct ground contact or exposed to persistent moisture may require a particular treatment specification.
Natural characteristics of timber
Timber is a natural material, so individual lengths will vary in grain pattern, colour, 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 relevant grading requirements.
Pressure treatment introduces moisture into the timber. As the wood dries, some natural shrinkage, twisting, bowing or cupping may occur. Appropriate storage, acclimatisation 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 following outdoor exposure.
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 6×2 is an approximate imperial description rather than a guarantee of exact finished dimensions. Customers requiring precise measurements 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 involving precise joints or close-fitting components.
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 every cut end, drilled hole and notch. 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 must follow the approved design and be suitable for the anticipated loads.
Storage and maintenance
Store the timber flat, raised above 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 once 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 might collect.
Key benefits
- Substantial 47 x 150mm timber section
- Commonly known as 6×2 timber
- Convenient 3.0m length
- Pressure treated against decay and insects
- Suitable for outdoor frameworks and landscaping
- Useful for garden and agricultural structures
- Easier to handle than longer timber lengths
- Can be cut for different project requirements
- More durable than untreated softwood
- Suitable for professional and DIY construction
Tanalised Treated Timber 47 x 150mm 3.0m – 6×2 Timber provides a substantial section and manageable length for outdoor 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.
