How and where to use guide
3.0Mtr X 47 X 50mm (2" x 2") Treated Regularised KD Carcassing Timber
Floor joists and structural framing
The 47×50mm section is commonly used for floor joists in residential construction, particularly in lighter-duty applications or where joist spacing allows. It is also suitable for structural framing in stud walls, providing the vertical and horizontal members needed for load-bearing partitions and external walls.
- Floor joists in residential buildings
- Stud walls and load-bearing partitions
- Structural framing in light commercial buildings
- Horizontal and vertical members in timber-frame construction
Roof and decking applications
This timber works well as roof battens and purlins in pitched roof construction, and as the frame for decking structures. The regularised profile ensures consistent bearing and fixing, whilst the C24 grade provides the strength needed for these applications.
- Roof battens and purlins
- Decking frames and joists
- Roof rafter support members
- Garden structures and outbuildings
Installation and fixing
The regularised finish allows straightforward installation with minimal on-site preparation. Fix using appropriate structural fixings—typically galvanised or stainless steel nails, screws, or bolts depending on the application. Ensure adequate bearing length at supports and follow building regulations for joist spacing and load distribution.
- Use galvanised or stainless steel fixings to prevent corrosion
- Ensure adequate bearing length at supports
- Follow building regulations for spacing and load limits
- Allow for timber movement in long spans
Environmental and durability considerations
The pressure treatment provides long-term protection in damp or exposed conditions. However, avoid prolonged direct contact with soil or standing water. Cut ends should be treated with a suitable timber preservative to maintain protection at exposed surfaces. The treated timber is suitable for both interior and exterior use.
- Treat cut ends with preservative
- Avoid prolonged soil contact
- Suitable for interior and exterior applications
- Pressure treatment extends service life significantly