What is the difference between C24 and BSH glulam?

C24 is solid sawn timber graded to a single strength class. BSH (Brettschichtholz) is glued laminated timber made from multiple layers bonded together, achieving higher strength classes (GL24h to GL32h) and allowing much longer spans and larger cross-sections than solid timber.

C24 is solid sawn timber graded to a single strength class. BSH (Brettschichtholz) is glued laminated timber made from multiple layers bonded together, achieving higher strength classes (GL24h to GL32h) and allowing much longer spans and larger cross-sections than solid timber. BSH is specified where spans exceed 5-6 metres or where architectural expression demands exposed structural timber.

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

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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.