How is glulam specified for a project?

A complete glulam specification includes: strength class (GL24h, GL28h, GL32h per EN 14080), species (affects appearance and durability), visual grade (industrial, standard, or premium per manufacturer's classification), surface finish (planed, sanded, or special), moisture content at delivery (typically 12% ±2%), dimensional tolerances (per EN 14080 or project-specific), treatment (none, or specify system for external use), certification (FSC/PEFC chain of custody), fire performance requirements, and connection details. For exposed applications, request sample approval before production to confirm visual quality meets expectations.

A complete glulam specification includes: strength class (GL24h, GL28h, GL32h per EN 14080), species (affects appearance and durability), visual grade (industrial, standard, or premium per manufacturer's classification), surface finish (planed, sanded, or special), moisture content at delivery (typically 12% ±2%), dimensional tolerances (per EN 14080 or project-specific), treatment (none, or specify system for external use), certification (FSC/PEFC chain of custody), fire performance requirements, and connection details. For exposed applications, request sample approval before production to confirm visual quality meets expectations.

Why this matters

This question relates to Glulam Beam Design: Aesthetic & Structural Possibilities, 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:

→ Glulam Beam Design: Aesthetic & Structural Possibilities

Related questions

• What spans can glulam beams achieve?
• Can glulam beams be curved?
• What surface finish options are available for exposed glulam?

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.