+ First step of glulam log manufacturing process is breakdown of debarked wood.
+ Lamellas graded by size and quality are dried in specialized drying tunnels to reach moisture content of 8-18% depending on log type and adhesive used. Drying tunnels Tekmawood, Myulbok-Vanichek with automatic drying control provide moisture spread within +/- 1,5%.
+ Dried lamellas pass acceptance moisture content and crook check using Microtech 702 system with XR module, which performs automatic wood grading by color, laser and X-ray scanning and separates the material by strength grade from C16 to C45 and by visual class. Defects marking is done via scanning.
+ Automatic temperature monitoring and maintaining temperature at the level of +20°С and humidity of 60% provide the best conditions for gluing.
+ Finger joint profile is then milled on end faces of the lamellas resulting from grading. After that the adhesive is applied. Its volume is less than 1% of the glulam log. Glued lamella may reach 12 m/13,5 m in length.
+ Glued lamellas are pressed to get the log of the required profile. Perfect quality of gluing is provided by modern equipment – HFC press Kallesoe (Denmark), which provides material heating at molecular level resulting in decrease of adhesive content in the products and increase of efficiency. Increase of the product geometrical dimensions is provided by cold hydraulic press DUCET (Canada), which glues the log in two planes.
+ The log is then planed and milled (profiled). Further building parts are manufactured in plant conditions, which provides evenness and tightness of joints.
Adhesive used – Akzo Nobel Cascomin MUF-system (1257 – for Russia, 1265 – for Japan), also we use PRF system 1717/2575, EPI system 1937/1943. Materials used for production correspond with hazardous emission class (for example, formaldehyde), European and Japanese standards:
- Е1 – Europe (below natural background)
- F**** – Japan (limited application of materials containing formaldehyde).
Advantages of glulam log structures:
- Gluing provides high rigidity of the load bearing part.
- Technology of lamellas multi-layer gluing allows producing the parts of almost any shape and length.
- Glulam log is applicable for chemically aggressive environment.
Glulam profile log may be used:
+ For building of walls in wood house-building. It is applicable both for log and post-and-beam structures.