How and where to use guide
4.8Mtr X 47 X 250mm C24 Treated Regularised KD Carcassing Timber
Typical applications
C24 timber is ideal for structural applications where load-bearing capacity and durability are important. Common uses include floor joists in residential buildings, roof battens and purlins, stud walls for internal partitions and external frames, and decking frames for outdoor structures. The pressure treatment makes it particularly suitable for applications with moisture exposure or ground contact.
- Floor joists in domestic and light commercial buildings
- Roof battens and structural battens
- Stud walls and partition framing
- Decking frames and outdoor structures
- General structural carcassing work
Strength and load-bearing
C24 is a higher strength grade than C16, offering improved load-bearing performance and stability. It contains fewer knots and provides better structural reliability for demanding applications. Always refer to your structural design or building plans to confirm that C24 grade is appropriate for your specific load requirements and span distances.
- Higher strength than C16 grade
- Fewer knots and improved stability
- Suitable for longer spans and higher loads
- Meets BS EN standards for structural timber
Installation and fixing
The regularised, planed finish provides a clean, professional appearance and makes installation straightforward. Timber should be fixed using appropriate fasteners—typically galvanised or stainless steel nails, screws, or bolts depending on the application. Ensure adequate bearing and support at each end, and follow building regulations and structural design requirements for spacing, fixing centres, and lateral bracing.
- Use galvanised or stainless steel fasteners
- Ensure adequate bearing at supports
- Follow structural design for spacing and fixing
- Provide lateral bracing where required
- Planed finish allows clean, professional installation
Indoor and outdoor use
The pressure treatment allows this timber to be used in both indoor and outdoor environments. For outdoor applications, ensure adequate ventilation and drainage to minimise moisture retention. For indoor use, standard building practice applies. In all cases, avoid prolonged contact with standing water or soil.
- Suitable for indoor structural applications
- Suitable for outdoor decking frames and structures
- Ensure good ventilation in outdoor applications
- Avoid prolonged ground contact without additional protection
- Treatment provides long-term durability in both environments