47mm x 50mm (2 x 2) - Sawn Kiln Dried & Pressure Treated (Tanalised) C24 Graded Timber

47mm x 50mm (2 x 2) Pressure Treated (Tanalised) C24 Timber is a compact, high-strength structural softwood section combining C24 strength grading, kiln drying, and pressure treatment for improved durability and performance.

C24 carcassing timber is kiln dried and strength graded to C24 standards, providing known and reliable structural performance. Stress grading is carried out either in the country of origin to BS 4978 or visually graded at the sawmill by qualified graders.

Kiln drying to 20% moisture content or less improves stability, straightness, and reduces the risk of excessive movement once installed, helping meet current building regulations.

This timber is regularised (planed all round) for consistent sizing, typically finishing approximately 2mm off nominal thickness and 5mm off nominal width. For example, a 47mm x 50mm section will finish at around 45mm x 45mm, with eased edges for safer handling and easier fixing.

Pressure treated under licence using Celcure AC-500, this timber has enhanced resistance to rot and insect attack. The treatment specification corresponds to Use Class 2 (UC2), making it suitable for internal structural use or protected external applications where occasional moisture exposure may occur. In practice, many customers also use treated C24 timber externally where good detailing, drainage, and airflow are provided.

For best long-term performance, all cut ends should be sealed with a suitable preservative after cutting. While treated, this timber is not intended for direct ground contact.

Typical uses include battening, framing, studwork, bracing, pergola components, garden structures, decking details, and general construction, where a slim but strong section is required.

About timber sizes:
Although all timber is sold in metric sizes, imperial measurements remain widely used across the trade. We list both metric and imperial equivalents to help you find the right product easily. Always use the metric measurement when measuring timber for accuracy.

Why choose C24 over C16?
Most CLS timber in the UK is graded to C16, however:

• C24 is graded to a higher strength standard

• Achieved from slower-grown timber with tighter grain

• Approximately 50% stronger than C16

• Better suited to longer spans and heavier loads

Nominal size: 47mm x 50mm (2 x 2)
Finished size: approx. 45mm x 45mm
Grade: C24 strength graded
Treatment: Pressure treated (Tanalised – Celcure AC-500)
Use Class: UC2
Moisture content: Kiln dried to ≤20%