Tanalised Treated Timber 47 x 225mm 6.0m – 9×2 Timber
Tanalised Treated Timber 47 x 225mm 6.0m is a substantial pressure-treated softwood section suitable for demanding building, landscaping and outdoor construction projects. It is commonly referred to as 9×2 timber, based on its traditional approximate imperial dimensions of 9 inches by 2 inches.
Combining a deep 225mm section with an extended 6.0-metre length, this timber is suitable for larger frameworks and projects requiring a substantial continuous length. Where the design allows, the longer format may help reduce the number of joints required across the structure.
The timber has been pressure treated with wood preservative to provide additional protection against fungal decay and wood-destroying insects. This 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 225mm
- Common imperial name: 9×2 timber
- Length: 6.0m
- Material: Treated softwood
- Treatment: Pressure treated or tanalised
- Suitable for: Building, landscaping and outdoor projects
The name 9×2 is a traditional trade description rather than an exact imperial conversion. Use the stated metric dimensions when measuring and planning your project.
What is tanalised timber?
Tanalised timber is softwood that has been treated with preservative inside a controlled pressure vessel. The vacuum and pressure process encourages the preservative to penetrate deeper into the wood than a basic surface-applied treatment.
This treatment helps protect the timber from fungal decay and attacks by wood-destroying insects. It can extend the service life of the product when the timber is used in suitable external applications.
Pressure treatment does not make timber waterproof or completely maintenance-free. Exposure to moisture, sunlight and temperature changes can still cause natural movement, weathering, fading and surface checking.
Cut ends, drilled holes and notches expose internal wood that may not have received the same level of treatment. Apply an appropriate end-grain wood preservative to these areas during installation.
Common uses for 9×2 treated timber
The deep 47 x 225mm section and long 6.0m format make this timber suitable for various substantial projects, subject to the required strength grade and construction specification.
Possible applications include:
- Large outdoor timber frameworks
- Substantial garden buildings
- Landscaping projects
- Timber supports and bearers
- Agricultural and equestrian construction
- Raised garden structures
- External carpentry and joinery
- General construction work
- Bespoke outdoor features
- Repairs to existing timber structures
- Load-bearing members where correctly graded
- Long timber runs requiring fewer joints
Where the timber will carry structural loads, confirm that it has the correct strength classification for the intended use. Tanalised timber should not automatically be assumed to be C16 or C24 unless the product is specifically marked and sold with that grade.
A suitably competent person should determine the correct spans, loads, support spacing, connections and fixings for structural applications.
Benefits of the 6.0m length
The extended 6.0-metre length provides flexibility for larger construction and landscaping projects. It may allow longer continuous runs and reduce the number of joints where this is appropriate for the design.
The timber can also be cut into multiple shorter components. Preparing a cutting schedule before work begins may help reduce waste and improve the efficient use of each length.
Access and handling requirements should be considered before ordering. A 6.0m length requires enough space for unloading, carrying, turning, storage and final positioning.
Due to its length, deep section and moisture content, the timber may be heavy and difficult to manoeuvre. Suitable lifting assistance and safe manual-handling procedures should be used.
Natural characteristics of timber
Timber is a natural product, meaning individual lengths will vary in grain pattern, colour, knots and texture. These variations are normal and contribute to the natural appearance of the material.
Knots, resin pockets, minor splits and surface checking may be visible. These characteristics are not necessarily defects, although their acceptability will depend on the intended application and any structural grading requirements.
Pressure treatment increases the moisture content of the wood. As it dries, some shrinkage, twisting, bowing or cupping may occur. Longer lengths can display more noticeable movement and should be stored with sufficient support.
Newly treated timber may initially appear green or brown depending on the treatment system. The colour will generally fade and weather gradually after installation 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 9×2 is an approximate imperial description rather than a guarantee of exact finished dimensions. If precise measurements are critical, measure the timber before installation or contact us to confirm the current stock specification.
Allow the timber to acclimatise appropriately before completing work involving close tolerances or precisely fitted joints.
Cutting and installation
Use suitable woodworking equipment 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 area 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.
Treat all cut ends, drilled holes and notches with a suitable end-grain preservative. Use corrosion-resistant fixings compatible with treated timber, especially in external or moisture-prone environments.
For structural work, 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 away from the ground and supported at regular intervals. Correct support is especially important for 6.0m lengths, as unsuitable storage may increase bowing or twisting.
Protect the timber from prolonged saturation while allowing air to circulate. Do not leave long lengths unsupported or resting directly on wet ground.
A compatible wood stain, oil or protective coating may be applied to visible outdoor timber after it has dried sufficiently. Follow the coating manufacturer’s preparation and moisture-content instructions.
Inspect external timber periodically, paying particular attention to cut ends, joints, fixings and areas where water might collect.
Key benefits
- Deep 47 x 225mm timber section
- Commonly known as 9×2 timber
- Extended 6.0m length
- May reduce joints in longer structures
- Pressure treated against decay and insects
- Suitable for substantial outdoor frameworks
- Useful for landscaping and garden construction
- Can be cut to meet project requirements
- More durable than untreated softwood
- Suitable for professional and DIY projects
Tanalised Treated Timber 47 x 225mm 6.0m – 9×2 Timber provides a deep section and extended length for demanding 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.
