Duobalken® and Triobalken® consist of two or three dried boards or scantlings which are glued together flatwise.

Duobalken® and Triobalken® are also referred to as Balkenschichtholz in DIN 1052: 2008. The terms Lamellenholz, Lamellenbalken, Leimholz should be avoided due to the risk of confusion with glulam.

The products are subject to a national technical approval.


The manufacturing process corresponds to that of glulam, whereby larger individual cross-sections are glued together.


Duobalken® and Triobalken® are dimensionally very stable materials with minimum crack-forming due to the manufacturing method employed. In comparison with solid and finger-jointed timber, Duobalken® and Triobalken® have a higher modulus of elasticity. Due to the high dimensional stability and the low moisture-content Duobalken® and Triobalken® are very suitable for house-building.

Duobalken® and Triobalken® shall only be used in service-classes 1 or 2 (e.g. indoor room climate or outdoor climate under a roof) and shall not be exposed to extremely changing climatic conditions. In addition, all applications, for which the use of solid timber or glulam is permitted, according to DIN 1052 are approved.


Duobalken® and Triobalken® of coniferous timber with a sufficient natural durability can be used without preservative treatment even in higher use-classes.