European Finger-Jointed Laminated Frame Timber (KKK)

Finger-jointed laminated (KKK) is a structural product made of European oak, in which multiple sections are joined together via finger joints and adhesive bonding to form strong, stable elements. This construction ensures high strength, dimensional stability, and reduced movement, thereby limiting cracking and deformation. Consequently, KKK is highly suitable for load-bearing applications and larger spans. Thanks to the use of carefully selected European wood, KKK combines technical performance with a natural, high-quality appearance and contributes to sustainable forest management.

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Why finger-jointed laminated oak frame timber?

Finger-jointed laminated (KKK) offers high strength and stability because multiple sections of European oak are glued together. This results in less movement, fewer cracks, and a longer service life. Thanks to its construction, the material is suitable for larger spans and load-bearing applications, while simultaneously using resources efficiently and being produced sustainably. In this way, KKK combines reliability, sustainability, and the natural appearance of European wood.

Technical specifications

Name	European Oak (Quercus robur & petraea)
Usage class	3 (CEN/TS 13307-2: 2009)
Suitable for	Window, frame and door wood (interior)
Durability class	2-3
Voluminous mass	670-760 kg/m³ at 12% moisture content
Glued	D4 glued according to DIN EN 14257
Hardness (Janka)	4200-6300N

Stock of head sizes	63 x 145 mm – 72×120 mm – 72×145 mm 96×120 mm – 96×145 mm
Length	Standard 600cm
Certificate	FSC® 100%

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