Is C24 better than C16?

C24 has 50% higher bending strength than C16 (24 vs 16 N/mm²) and significantly higher stiffness. C24 allows longer spans, smaller sections, or wider spacing for the same loading conditions.

C24 has 50% higher bending strength than C16 (24 vs 16 N/mm²) and significantly higher stiffness. C24 allows longer spans, smaller sections, or wider spacing for the same loading conditions. For most structural applications, C24 is the standard specification. C16 is used only for light, non-critical framing where cost is the primary driver.

Why this matters

This question relates to C24 vs C16 vs C30 Timber Grading — What Architects Need to Know, which covers the broader topic in detail. Understanding this specific aspect helps architects, builders, and timber dealers make informed specification decisions.

For full context and additional technical detail, see our comprehensive guide:

→ C24 vs C16 vs C30 Timber Grading — What Architects Need to Know

Related questions

• What does C24 mean in timber?
• When should I specify C30 instead of C24?
• Can I use C16 for floor joists?

About this answer

This answer is part of the PuurModulair Knowledge Base — comprehensive timber specification guidance for architects, builders, and dealers across the UK, EU, and Scandinavia. All technical content is reviewed by qualified timber technologists before publication.