What is the difference between GL24h and GL28h?

GL24h has a characteristic bending strength of 24 N/mm² and mean modulus of elasticity of 11,600 N/mm². GL28h has 28 N/mm² bending strength and 12,600 N/mm² stiffness.

GL24h has a characteristic bending strength of 24 N/mm² and mean modulus of elasticity of 11,600 N/mm². GL28h has 28 N/mm² bending strength and 12,600 N/mm² stiffness. GL28h allows approximately 10-15% longer spans or smaller sections for the same loading. GL28h is specified when GL24h requires an unacceptably large section depth.

Why this matters

This question relates to BSH Glulam Beams: Span Tables, Load Capacity & Specification Guide, 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:

→ BSH Glulam Beams: Span Tables, Load Capacity & Specification Guide

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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.