Tanalised Treated Timber 47 x 150mm 4.8m – 6×2 Timber
Tanalised Treated Timber 47 x 150mm 4.8m is a versatile 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 combination of a substantial 150mm depth and a practical 4.8-metre length makes this timber suitable for a wide range of frameworks, garden structures and external building applications. It can be installed as a full length or cut into shorter components to suit the requirements of the project.
The timber has undergone a controlled pressure-treatment process to help protect it against fungal decay and wood-destroying insects. This additional protection makes it more durable than untreated softwood when correctly specified, installed and maintained in an appropriate outdoor environment.
Product dimensions
The nominal product dimensions are:
- Metric section: 47mm x 150mm
- Common imperial name: 6×2 timber
- Length: 4.8m
- Material: Treated softwood
- Treatment: Pressure treated or tanalised
- Suitable for: Building, landscaping and outdoor projects
The common name 6×2 is a traditional trade description rather than an exact imperial conversion. Use the stated metric dimensions when measuring, planning and completing your project.
What is tanalised treated timber?
Tanalised timber is softwood that has been treated with wood preservative using a controlled vacuum and pressure process. The treatment penetrates further into the wood than an ordinary surface-applied coating.
This process helps protect the timber against fungal decay and attacks from wood-destroying insects. It can help extend the timber’s service life when used in suitable external and exposed applications.
Pressure treatment does not make the timber fully waterproof or prevent all natural weathering. The wood can still absorb and release moisture, which may lead to movement, shrinkage, surface checking and colour changes.
Cutting, drilling or notching the timber can expose internal areas that have not received the same level of protection. Coat all freshly exposed surfaces with a suitable end-grain wood preservative during installation.
Common uses for 6×2 treated timber
The 47 x 150mm section is a popular and adaptable timber size for a variety of outdoor and general construction projects. Depending on its strength grade and the project design, possible applications include:
- Outdoor timber frameworks
- Garden buildings and structures
- Landscaping projects
- Timber supports and bearers
- Agricultural and equestrian projects
- Raised garden features
- External carpentry and joinery
- General building work
- Bespoke outdoor features
- Repairs to existing timber frameworks
- Load-bearing members where correctly graded
- Large garden and DIY projects
Where the timber will carry structural loads, confirm that it has the correct strength classification for the proposed use. 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 spans, support spacing, loads, connections and fixings should be determined by a suitably competent person where structural performance is required.
Advantages of the 4.8m length
The 4.8-metre length provides useful flexibility for medium-to-large projects. Where the design allows, it can help create longer continuous runs with fewer joints than shorter timber lengths.
It may also be divided into several smaller components. Preparing a cutting plan before beginning work can help reduce waste and make efficient use of the full length.
Site access and handling requirements should be considered before ordering. Ensure there is sufficient space to unload, store and manoeuvre a 4.8m length safely.
The weight of the timber will vary depending on its moisture content. Use appropriate lifting assistance and safe manual-handling techniques when moving or positioning longer lengths.
Natural characteristics of softwood
Timber is a natural material, so differences in grain, shade, knots and surface texture are normal. Every length will have its own individual appearance.
Knots, resin pockets, minor splits and surface checking may be visible. These characteristics are not automatically product defects, although their acceptability will depend on the intended use and any applicable grading requirements.
Pressure treatment introduces moisture into the timber. As the wood dries, it may experience some natural shrinkage, twisting, bowing or cupping. Correct 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. This colour will generally fade and weather gradually after the product is installed outdoors.
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 appropriately before completing work that requires close-fitting joints or particularly 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 when 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 should not be burned on domestic fires, in wood-burning appliances or on garden bonfires.
Apply a compatible end-grain preservative to all cut ends, drilled holes and notches. Use corrosion-resistant fixings suitable for treated timber, particularly in external or regularly damp environments.
For structural applications, supports, connections and fixings must be appropriate for the expected loads and installed in accordance with the approved drawings and specification.
Storage and maintenance
Store the timber flat, raised above the ground and supported at suitable intervals. Protect it from prolonged saturation while allowing air to circulate around the lengths.
A compatible wood stain, oil or protective coating may be applied to visible external timber once it has dried sufficiently. Always follow the coating manufacturer’s preparation and moisture-content requirements.
External timber should be inspected periodically, with particular attention given to cut ends, joints, fixing points and surfaces where water could collect.
Key benefits
- Versatile 47 x 150mm timber section
- Commonly known as 6×2 timber
- Supplied in a practical 4.8m length
- Pressure treated against decay and insects
- Suitable for outdoor frameworks and landscaping
- Useful for garden and agricultural structures
- Can be cut to suit different project requirements
- More durable than untreated softwood
- Suitable for professional and DIY construction
- Versatile for general external building work
Tanalised Treated Timber 47 x 150mm 4.8m – 6×2 Timber provides a versatile combination of depth and length for outdoor construction, landscaping and general building projects. Always confirm its exact dimensions, treatment level and strength grade against the requirements of the intended application before installation.
