What does C24 mean in structural timber?

C24 is a strength class defined by EN 338 indicating the timber has a characteristic bending strength of 24 N/mm². It is the most commonly specified grade for structural applications in European construction, suitable for floor joists, roof rafters, wall studs, and general load-bearing elements.

C24 is a strength class defined by EN 338 indicating the timber has a characteristic bending strength of 24 N/mm². It is the most commonly specified grade for structural applications in European construction, suitable for floor joists, roof rafters, wall studs, and general load-bearing elements.

Why this matters

This question relates to Structural Timber Specification Guide: C24, BSH Glulam & Engineered Wood, 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:

→ Structural Timber Specification Guide: C24, BSH Glulam & Engineered Wood

Related questions

• What is the difference between C24 and BSH glulam?
• How far can a C24 timber beam span?
• Is structural timber fire resistant?

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.