How and where to use guide
5.4Mtr X 47 X 200mm C24 Treated Regularised KD Carcassing Timber
Floor joists and structural framing
The 47×200mm profile and C24 strength grade make this timber suitable for floor joists in residential and light commercial construction. The treated preservative provides protection in areas prone to moisture.
- Use for ground floor joists where moisture risk is higher
- Suitable for upper floor joists in standard residential applications
- Spacing and sizing must comply with building regulations and structural design requirements
- Ensure adequate bearing length at supports (typically 40–50mm minimum)
Stud walls and partition framing
Regularised C24 timber is ideal for internal and external stud wall construction. The planed finish and consistent dimensions simplify layout and fixing.
- Use for load-bearing and non-load-bearing stud walls
- Treated timber offers durability in external applications
- Standard 400–600mm stud spacing applies depending on loads and building regulations
- Pair with appropriate head and sole plates for structural stability
Roof battens and decking frames
The strength and durability of C24 treated timber make it suitable for roof battens and decking frame construction, particularly where weather exposure or moisture risk is a factor.
- Use for roof battens supporting tiles or slates
- Suitable for decking frame joists and bearers
- Treated preservative provides long-term protection in exposed conditions
- Ensure adequate ventilation beneath decking to prevent moisture trapping
General structural applications
Beyond joists and framing, C24 carcassing timber is suitable for lintels, noggings, bracing, and other structural elements where strength and durability are required.
- Meets BS EN standards for structural timberwork
- Fewer defects than lower grades ensure consistent performance
- Kiln-dried condition reduces movement and cupping
- Suitable for both indoor and outdoor projects