6x2 Timber Treated C24
(14 Products)47mm x 150mm treated timber is a versatile structural material engineered for high-performance applications such as floor joists and roof rafters. Pressure-treated to provide long-term protection against biological decay, these lengths offer the mechanical strength required for load-bearing frameworks in both residential and commercial construction.
Understanding 6x2 Treated Timber
47mm x 150mm sawn treated timber, or 6x2, is a robust structural carcassing material essential for load-bearing applications where deflection must be minimised. While a narrower 5x2 timber profile is often sufficient for internal wall partitioning or shorter rafter spans, the 150mm depth of a 6x2 section provides significantly higher tensile strength and bending resistance. These lengths are kiln-dried to ensure dimensional stability and are strength-graded to C16 or C24 standards. This makes them the primary choice for suspended floor joists and flat roof systems where the permanent dead loads of the building envelope require a deeper timber cross-section to prevent sagging over time.
The timber typically features a finished size of approximately 45mm x 145mm. This refined profile includes eased edges for safer manual handling and provides a smooth, uniform surface that is essential for achieving level floor planes and plumb wall frames. Its 150mm depth makes it particularly well-suited for structural joisting where stiffness and resistance to deflection are paramount.
Our inventory includes an extensive range of lengths from 2.4m up to 7.2m, allowing for efficient material specification with minimal off-cut waste. Whether you are ordering individual lengths for a bespoke renovation or 77-length bulk packs for a large-scale housing project, this timber provides a reliable, durable foundation for permanent structures.
Material Range
- Individual 47mm x 150mm Lengths: Structural pressure-treated lengths available in eight sizes ranging from 2.4m to 7.2m to accommodate various span requirements.
- Bulk 6x2 Timber Packs: High-volume packs containing 77 lengths, designed for trade-scale installations where a consistent supply of treated carcassing is required (excludes 5.4m and 7.2m lengths).
Performance Benefits
- Advanced Preservation: Pressure-treated with fungicides and insecticides to ensure longevity in environments prone to moisture and damp.
- Structural Reliability: Kiln-dried and graded to meet specific mechanical performance standards for safety-critical building applications.
- Enhanced Stability: The kiln-drying process significantly reduces the risk of the timber warping, twisting, or shrinking once installed.
- User-Friendly Finish: Planed-all-round with eased edges to improve on-site ergonomics and precision during assembly.
Typical Applications
- Structural Joisting: Creating robust horizontal support systems for internal floors and flat roofs.
- Roof Rafters: Forming the primary sloping framework for pitched roof constructions.
- Decking Base-Frames: Providing a heavy-duty, rot-resistant substructure for external timber decking areas.
- Timber Framing: Constructing load-bearing external wall panels and internal partitions.
- Heavy-Duty Landscaping: Building permanent garden structures, including pergolas and structural retaining sleepers.
Specification & Standards
- BS EN 14081-1: Strength graded structural timber with rectangular cross section.
- BS EN 335: Durability of wood and wood-based products - Use classes.
- BS 8417: Preservation of wood - Code of practice for treatment and durability.
Related Materials and Construction Uses
These 47mm x 150mm sections are frequently integrated into complex building envelopes alongside other specialised components. For projects requiring standard load-bearing capacities in walling or short-span joisting, they are often used in conjunction with timber that meets C16 strength requirements. In more demanding engineering scenarios, such as wider floor spans or heavy roof loads, these lengths are typically specified alongside premium C24-rated structural timber to ensure the framework remains rigid and secure.
To maintain the integrity of the structural system, it is essential to use high-performance timber joist solutions and appropriate metalwork hangers. All cut ends must be treated with a proprietary end-grain preservative on-site to maintain the protective envelope provided by the initial pressure treatment.
Frequently Asked 6x2 Questions
What Lengths Does 6x2 Timber Come In?
Our high-quality C24 grade treated timber comes in 2.4m, 3m, 3.6m, 4.2m, 4.8m, 6m and 7.2m, with a consistent thickness of 47mm.
Is It Possible To Paint 6x2 Treated Timber?
Yes, you can absolutely paint treated timber. However, it is a good idea to allow the wood to dry completely before adding any paint or primer to it. This can take up to a few weeks depending on the environmental conditions of the storage area. Heat and direct sunlight can cause the treated timber to warp instead of dry out and damper conditions can prolong the drying out period.
What Is The Cost of 6x2 Timber?
Carcassing timber is a pretty common and relatively inexpensive building material. 47x150 C24 timber prices are often prone to fluctuation depending on the supply and demand at the time.
We will provide you with a very competitive price if you wish to buy 6 x 2 timber through our website. All our prices are per length. Timber prices are often referred to per by the metre. To convert a length price to a metre price, simply divide the length price by the length of the timber.
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When to Use 8x2 Timber: Applications & Span Guide
How To Build A Decking
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How to Build a Timber Frame Extension
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Timber Sizing
C16 vs C24 – What’s The Difference?
