Property

Value / Description

Source(s)

Product designation

Robinio laminated timber profiles, laminated

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Wood species

Robinia pseudoacacia, European hardwood

DIN EN 350

Application

Visible component, outdoor use

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Cross-sections

45×60, 45×70, 45×80, 45×90, 60×60, 70×90, 80×80, 90×70, 90×90 mm

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Available lengths

6.0 m

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Lamella construction

Multi-layer laminated profiles made of technically dried Robinia lamellas

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Moisture content at delivery

approx. 10–12 %

DIN EN 13183

Adhesive bonding

Adhesive type D4, in accordance with DIN EN 204

DIN EN 204

Finger jointing (lamellas)

Structural finger jointing, load-bearing

DIN EN 385

Bending test

4-point bending test, based on EN 408

Zwick / Roell

Modulus of elasticity (bending, mean value)

approx. 13,900 – 14,700 N/mm²

internal testing

Bending strength σM

approx. 70 – 88 N/mm²

internal testing

Compressive strength parallel to grain

approx. 55 – 70 N/mm²

literature / reference values

Tensile strength parallel to grain

approx. 70 – 100 N/mm²

literature / reference values

Brinell hardness (DIN EN 1534)

40 – 45 N/mm² (very hard – harder than oak, beech, ash)

DIN EN 1534

Density

approx. 790 kg/m³

literature value

Durability class

Class 1–2 (very high natural durability)

DIN EN 350

Service life

30–50 years in outdoor use without chemical treatment

DIN EN 350, IHD, WTA

Use class

Suitable for outdoor applications without chemical wood protection

DIN EN 335

Surface quality (visible side)

Planed, technically clean; natural colour and structural variations permitted

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Visual grading

Visible component – natural characteristics of Robinia permitted

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Cracking behaviour

Wood-typical cracking possible, especially under weathering; not structurally relevant

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Machining

Very hard wood; machining with carbide tools recommended; pre-drilling required

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Fasteners

Stainless steel A4 recommended

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Weather resistance

Very high, even without chemical treatment

DIN EN 335

Surface treatment (optional)

Oil or coating systems recommended to preserve colour

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Certifications (optional)

FSC® on request

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Structural design note

Structural design must be carried out by qualified structural engineers, taking project-specific loads into account

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