Timber · Glued laminated timber, homogeneous · orthotropic

GL28h

Name: GL28h — material properties (EN 14080:2013)
Creator: BadgerMecX

EN 14080:2013 · strength class

GL28h is a homogeneous glued laminated timber class to EN 14080:2013. Its characteristic bending strength is 28 MPa. Along the fibres E₁ = 12.6 GPa; across them E₂ = 0.3 GPa.

Record: glulam-gl28h
Library: v1.1.0
Properties: 19
Sources: 1
Build check: passed ✓
Viewing as: guest

E₁ · Modulus, direction 1 12.6GPa mean^[1]

f_m,k · Bending strength 28MPa char^[1]

f_t,0,k · Tension parallel to grain 22.3MPa char^[1]

ρ · Density 460kg/m³ mean^[1]

Elastic constants

orthotropic

Symbol	Property	Value	Unit	Basis	Ref.
E₁	Modulus, direction 1 ⓘ E_0,g,mean	12.6	GPa	mean	[1]
E₀,₀₅	Modulus parallel to grain, 5 % fractile	10.5	GPa	char	[1]
E₂	Modulus, direction 2 ⓘ E_90,g,mean	0.3	GPa	mean	[1]
E₃	Modulus, direction 3 ⓘ E_90,g,mean	0.3	GPa	mean	[1]
G₁₂	Shear modulus 1-2 ⓘ G_g,mean	0.65	GPa	mean	[1]
G₁₃	Shear modulus 1-3 ⓘ G_g,mean	0.65	GPa	mean	[1]
G₀₅	Shear modulus, 5 % fractile	0.54	GPa	char	[1]
E₉₀,₀₅	Modulus perpendicular to grain, 5 % fractile	0.25	GPa	char	[1]
G₂₃	Shear modulus 2-3 ⓘ G_r,g,mean, rolling shear	0.065	GPa	mean	[1]
G_r	Rolling shear modulus	0.065	GPa	mean	[1]

Physical, thermal and electrical

at 20 °C

Symbol	Property	Value	Unit	Basis	Ref.
ρ	Density	460	kg/m³	mean	[1]
ρ_k	Density, characteristic (5 % fractile)	425	kg/m³	char	[1]

Strength

a band applies up to and including its upper limit

Symbol	Property	Value	Unit	Basis	Ref.
f_m,k	Bending strength	28	MPa	char	[1]
f_t,0,k	Tension parallel to grain	22.3	MPa	char	[1]
f_t,90,k	Tension perpendicular to grain	0.5	MPa	char	[1]
f_c,90,k	Compression perpendicular to grain	2.5	MPa	char	[1]
f_v,k	Shear strength	3.5	MPa	char	[1]
f_c,0,k	Compression parallel to grain	28	MPa	char	[1]
f_r,k	Rolling shear strength	1.2	MPa	char	[1]

Notes

EN 338 and EN 14080 give no Poisson's ratios; a 3D analysis needs them from another source.

Sources

every value names one

EN 14080:2013, Timber structures — Glued laminated timber, Tables 4 and 5Copies checked: 1, 2, 3, 4

min product standard minimum char characteristic design code value for design typical datasheet or textbook derived worked out here, formula shown

Cite this page

for reports and papers

BadgerMecX Materials (2026). GL28h — material properties, EN 14080:2013. Library v1.1.0, record glulam-gl28h. https://badgermecx.com/materials/glulam-gl28h/ (accessed 2026-10-08).

@misc{badgermecx_glulamgl28h,
  title  = {GL28h -- material properties, EN 14080:2013},
  author = {{BadgerMecX Materials}},
  year   = {2026},
  note   = {Library v1.1.0, record glulam-gl28h},
  url    = {https://badgermecx.com/materials/glulam-gl28h/}
}

Export and related

SI units, every value with basis and source