Fixing and buying guide
4.8Mtr X 47 X 225mm C24 Treated Regularised KD Carcassing Timber
Selecting the right size
This product is supplied as 4.8 metre lengths with a cross-section of 47 × 225mm. Measure your span and load requirements carefully before purchase. C24 timber offers superior load-bearing capacity compared to C16 grade, making it suitable for floor joists, roof battens, and stud walls where strength is critical. The regularised finish means edges are planed smooth for consistent sizing across pieces.
- Check your structural design calculations to confirm 47 × 225mm is appropriate for your span
- Account for the full 4.8m length when planning delivery and storage
- Regularised timber has a planed finish for easier handling and installation
Storage and handling
Treated timber should be stored in dry conditions to maintain its properties. Stack pieces horizontally with spacers between layers to allow air circulation. Avoid prolonged exposure to standing water, though the pressure treatment provides protection against rot and decay.
- Store under cover in a well-ventilated area
- Use timber spacers between layers to prevent moisture trapping
- Keep away from direct ground contact
Fixing methods
C24 carcassing timber is typically fixed using standard carpentry methods appropriate to its application. For floor joists and structural work, use galvanised or stainless steel fixings to prevent corrosion, particularly important given the timber's treated status. Nailing, screwing, and bolting are all suitable depending on your specific application.
- Use corrosion-resistant fixings (galvanised or stainless steel)
- Follow building regulations and structural design specifications for fixing centres and methods
- Pre-drill where necessary to prevent splitting, particularly near timber edges
Compliance and standards
This C24 Treated Carcassing Timber meets BS EN standards for strength grading and is pressure-treated for durability. It is suitable for use in applications requiring structural reliability and protection against rot, fungal decay, and insect attack.
- Meets current BS EN standards for structural timber
- Pressure-treated for long-term durability
- Suitable for both indoor and outdoor structural applications