How and where to use guide
4.2Mtr X 47 X 100mm C24 Treated Regularised KD Carcassing Timber
Floor joists and suspended floors
This timber is well-suited for floor joists in residential and light commercial buildings. The 47 × 100mm section provides good strength-to-weight ratio for typical domestic floor spans. Use with appropriate spacing (typically 400mm or 600mm centres) and ensure adequate bearing at walls and beams. The treated finish provides protection in situations where moisture levels may occasionally rise.
- Ideal for residential floor joists at standard spacings
- Provides good load-bearing capacity for domestic applications
- Treatment protects against moisture in suspended floor voids
- Ensure adequate bearing length at support points
Stud walls and partitions
C24 timber is commonly used for internal and external stud walls. The regularised finish (planed smooth) makes it easy to work with and provides a clean appearance. For external walls, the treatment provides additional protection against weather exposure. Fix studs to top and bottom plates at appropriate centres, typically 400mm or 600mm, depending on loads and building regulations.
- Suitable for internal partition walls and external stud walls
- Smooth planed finish simplifies installation and finishing
- Treatment provides weather protection for external applications
- Fix at standard centres in accordance with building regulations
Roof battens and structural roof work
This section is suitable for roof battens and general roof structural work in residential buildings. The treatment provides protection in the roof void environment. Ensure adequate fixing to rafters or trusses and follow building regulations for roof construction. For pitched roofs, consider ventilation requirements and ensure battens do not obstruct necessary air flow.
- Suitable for roof battens and counter-battens
- Treatment protects against moisture in roof voids
- Fix securely to structural members below
- Maintain adequate ventilation in roof spaces
Decking frames and external construction
The preservative treatment makes this timber suitable for external decking frames and garden structures. The 47 × 100mm section provides adequate strength for typical domestic decking applications. Ensure all fixings are stainless steel or hot-dipped galvanised to prevent corrosion. Consider additional surface protection such as decking oil or stain to maintain appearance and provide extra weather protection.
- Ideal for decking frames and external structural work
- Treatment provides rot and insect protection
- Use corrosion-resistant fasteners throughout
- Apply additional surface finishes for enhanced durability and appearance
General construction and building work
Beyond the applications above, C24 Treated Carcassing Timber is suitable for general structural timberwork including lintels, noggings, bracing, and temporary works. Its strength-graded properties ensure reliable performance in load-bearing applications. Always verify that the section and grade meet your specific structural requirements through design calculations or reference to building standards.
- Suitable for lintels, bracing, and structural noggings
- Can be used for temporary works and site structures
- Verify adequacy for your specific application through design
- Meets BS EN standards for structural timber applications