(EI)Structural glulam timber

Structuralglulam timber.

Technical data, strength classes and dimensions of EMMA INDUSTRIE glulam, with PDF work sheets to set up your project.

Every lamination is selected and produced to last for generations.

44 m

maximum length

30 × 280 cm

maximum cross-section

GL20 – GL32

strength classes

EN 14080

CE marking

Technical data sheet

EMMA INDUSTRIE glued laminated timber

Product: Glued laminated timber (BSH / glulam)
Reference standard: EN 14080:2013, CE marking, assessment system 1
Intended use: Buildings and bridges
Wood species: Spruce / fir
Strength classes: From GL20 to GL32, homogeneous (h) and combined (c)
Adhesive: Type I according to EN 301
Service classes: 1 and 2
Reaction to fire: D-s2, d0
Formaldehyde emission: Class E1 / E2
Durability of wood: According to EN 350-2
Cross-sections: Up to 30 × 280 cm
Lengths: Up to 44 m

The strength class and dimensions of the supplied material are stated in the delivery documents.

Strength classes

Characteristic values according to EN 14080:2013

GL	Bending strengthfm,k [N/mm²]	Tension parallelft,0,k [N/mm²]	Compression parallelfc,0,k [N/mm²]	Shearfv,k [N/mm²]	Mean modulus of elasticityE0,mean [N/mm²]	Characteristic densityρk [kg/m³]
GL24h	24	19,2	24	3,5	11.500	385
GL28h	28	22,3	28	3,5	12.600	425
GL32h	32	25,6	32	3,5	14.200	440
GL24c	24	17	21,5	3,5	11.000	365
GL28c	28	19,5	24	3,5	12.500	390
GL32c	32	19,5	24,5	3,5	13.500	400

Homogeneous classes (h): all laminations of the same class. Combined classes (c): stronger laminations in the outer zones of the section. We produce all classes from GL20 to GL32 covered by our declaration of performance.

Dimensions and shapes

Beams made to fit the project

EMMA INDUSTRIE curved glulam beam on steel supports — Curved glulam beam: arches, S and double-S beams made to measure in our plant.

Maximum cross-section: 30 × 280 cm
Maximum length: 44 m
Straight beams: Constant section, for floors, roofs and frames
Curved and cambered beams: Arches, S and double-S beams, domes
Special beams: Duo-pitch, tapered and free-form, to drawing
Transport and installation: Planned by our technical office through to installation on site

Sections and lengths are defined on the project: our technical office checks the most suitable and cost-effective solution.

X-LAM (CLT) panels

Thicknesses and layer build-up

Finished thickness (mm)	Number of layers	Layer build-up (mm)
54	3	18L-18T-18L
60	3	20L-20T-20L
80	3	30L-20T-30L
90	3	30L-30T-30L
90	5	18L-18T-18L-18T-18L
100	3	30L-40T-30L
100	5	20L-20T-20L-20T-20L
120	3	40L-40T-40L
120	5	20L-30T-20L-30T-20L
140	5	33L-20T-33L-20T-33L
150	5	30L-30T-30L-30T-30L
165	5	33L-33T-33L-33T-33L
180	5	40L-30T-40L-30T-40L
200	5	40L-40T-40L-40T-40L
210	7	30L-30T-30L-30T-30L-30T-30L
220	7	40L-20T-40L-20T-40L-20T-40L
240	7	30L-40T-30L-40T-30L-40T-30L
270	9	30L-30T-30L-30T-30L-30T-30L-30T-30L
280	7	40L-40T-40L-40T-40L-40T-40L
300 (297)	9	33L-33T-33L-33T-33L-33T-33L-33T-33L

300 mm: 297 mm nominal.

Panel strength profile – class C24

Property	Loads	Symbol	Value
Bending	Out-of-plane loads	fm,k	24.0 N/mm²
Bending	In-plane loads	fm,edge,k	20.5 N/mm²
Tension	In-plane loads parallel to the grain	ft,0,k	14.0 N/mm²
Tension	Loads perpendicular to the plane	ft,90,k	0.5 N/mm²
Compression	In-plane loads parallel to the grain	fc,0,k	21.0 N/mm²
Compression	Loads perpendicular to the plane	fc,90,k	2.5 N/mm²
Shear	Out-of-plane loads	fv,k	3.5 N/mm²
Shear	Rolling shear	fr,k	0.7 N/mm²
Modulus of elasticity	In-plane and out-of-plane loads	Emean	11,000 N/mm²
Modulus of elasticity	Loads perpendicular to the plane	E90,mean	370 N/mm²
Shear modulus	Out-of-plane loads	Gmean	650 N/mm²
Shear modulus	Rolling shear	Gr,mean	65 N/mm²
Density	Characteristic	ρk	385 kg/m³
Density	Mean	ρmean	420 kg/m³

X-LAM panels page

L = longitudinal layers, T = transverse layers. Panel thickness and build-up are chosen on the project with our technical office.

PDF work sheets

Download the sheets and use them for your project.

Each sheet contains the technical data and a work sheet to fill in with your project data and send to our technical office. Leave your details once to download them all.

Quick section sizing

Choose the element, enter span and loads: we estimate the minimum depth of the glulam beam, checking bending, shear and deflection. For roofs we calculate the snow load according to NTC 2018.

Span (m)Spacing (m)Superimposed permanent loads (kg/m²)Use category (NTC 2018)Strength classWidth b (cm)Service classCode

Estimated section

16 × 52 cm

GL24h · final deflection 37,2 mm

Bending80%

Shear42%

Instantaneous deflection (L/300)79%

Final deflection (L/250)93%

Beam list and length optimisation

Enter the beams you need, even of different lengths: we calculate the total volume and how to cut them together from standard 12.00 and 13.50 m beams with minimum waste.

Number of beamsLength of each beam (m)

No length entered: we use the span. Add bearings or overhangs for an accurate list.

Download the Excel template

Columns Quantity and Length (in m, or in mm/cm if stated in the header). Identical lengths are merged; uploading replaces the current rows.

Total volume

0,832 m³

1 beams · 16 × 52 cm

To order

1 × standard beams

12,00 m · 0,998 m³ · waste 2,00 m (16,7%)

1 × 12,00 m → 10,00 m · waste 2,00 m

Every cut takes 1 cm, including trimming at both ends of the standard beam: one standard beam gives at most 13.48 m. 12.00 and 13.50 m beams are combined to order as few metres as possible.

Preliminary estimate, it does not replace the structural calculation by a qualified engineer. Assumptions: member simply supported and restrained against lateral-torsional buckling, medium-term loads (kmod 0.8), self weight 510 kg/m³, ULS combination 1,30·G + 1,5·Q, γM 1,45, depths in 4 cm steps. Roofs: snow qs = μ1·qsk (CE = Ct = 1), span measured on plan, permanent loads on the slope.

FAQ

Frequently asked questions about glulam

It is a structural product made by bonding selected, dried timber laminations together with their grain parallel. Compared with solid timber it allows much larger sections and lengths, curved shapes and more consistent mechanical performance.

We produce spruce glulam in all classes from GL20 to GL32, both homogeneous (h) and combined (c), according to EN 14080 with CE marking.

We make beams up to 44 m long with sections up to 30 × 280 cm, straight, curved or with special geometry, always made to fit the project.

Yes. Its reaction to fire is D-s2, d0, and in a fire it chars slowly and predictably on the surface: the charred layer protects the core of the beam. The required fire resistance is achieved by sizing the section according to Eurocode 5 (EN 1995-1-2).

Glulam is certified for service classes 1 and 2. For structures exposed to the weather, such as bridges and walkways, suitable constructive protection and treatments are designed.

CE marking according to EN 14080 with declaration of performance, certificate of constancy of performance, ISO 9001 quality system, processing centre certificate and PEFC chain of custody. The documents can be downloaded from the website.

Yes: arches, S and double-S beams, domes and free forms are our speciality, from design to installation.

Fill in the quote form on the website or download the work sheet, enter your project data and send it to info@emmaindustrie.it. You can attach drawings and CAD files.

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