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Fachwerk Houses

GLUED PROFILED TIMBER PRODUCTION

GLUED PROFILED TIMBER PRODUCTION
Let us consider the main stages of production of glued timber and beams. Wood is primarily sorted in compliance with TAMAK’s technical requirements before drying. For providing that the wood moisture content is 10±2% and for removing the internal stress it is dried in technical rooms under special conditions.
After that in accordance with the European standard DIN 4074 wood is graded and sorted automatically depending on whether the moisture content complies with the set-up parameters. This operation helps to avoid thickness inaccuracies of the laminations and to ensure glued joint strength. The selected wood is transferred to the workpiece bonding stage.
Move the timber to the cutting and splicing of defects

In the manufacturing area we maintain a constant air temperature of not less than 20С and relative humidity of 40-70%. The moisture content of glued timber structures is determined by their service conditions: 8-12% for class II glued timber structures (load-bearing structures of buildings of any span) and 9-15% for class III (wall beams, building envelope framings, window beams). Every board coming into production undergoes moisture content testing and in case of any deviation from the set-up parameters it is rejected.

At the next stage the defects on the face and edges of the wood are detected, marked and automatically cut out. Fingers are made on the selected workpieces which are then bonded together to the length of 12m.

The long lamellae undergo one more planing and come to the gluing stage. During this planing the lamellae get the exact geometric size and the surface roughness necessary for the following gluing.

Surface roughness excess leads to unevenness of the glue layer depth and, therefore, to a rise in shrink stress loosening the glued joint. That is the reason why the lamellae are planed to smoothness class I. Under TAMAK’s technical conditions the actual glued joint depth is 0, 05-0, 10mm. The glued materials correspond to the climate conditions under which the products are going to be used. Durability and quality of the finger joints of TAMAK’s glued timber complies with the requirements of DIN 68140-1 and GOST 19414-90 for load-bearing glued structures. Durability of the glued joints is in compliance with technical conditions 5366-030-50068227-2007.

After that the timber is planed to smoothness class I and profiled with the four-way dressing machine. This operation having been done the workpiece goes to the stage of house element production.
Profiled laminated veneer lumber

Production of house structures does not only require accurate processing but also preservation of proportions and geometric dimensions all the length of the glued timber. Since the automatic lines cut out complex joints with absolute precision, the processed material, that is the glued timber, must have ideal parameters. Otherwise, different mismatches in the joints may occur. According to the in-house technical conditions, deviation in length for the glued timber TAMAK 12 m long must not be more than ± 3 mm (± 0,025%), while deviation in thickness does not exceed ± 1 мм (± 0,49%).

Production of house members out of glued timber is carried out with the multi-purpose automatic wood processing centres Hundegger K2 (Germany). These automatic lines of the world-known company give the possibility of quick and accurate production of joints of roof timbers and wall elements of glulam houses ranging in complexity. 
The computer programme Cardwork with the help of which the engineering documentation for house construction is developed in detail sends the information to the machines. 

Working with brand-new equipment requires that the staff should be highly qualified. Specialists of the company TAMAK have advanced knowledge and skills in wood processing, design and planning objects made of glued laminated timber. Our production engineers work hard trying to develop glued timber production and regularly conduct tests in the laboratories.

After the house members have been manufactured they are put onto the pans and are packed with the special white and black film which has the following advantages:

  • it gives the possibility of keeping without storehouses up to 12 months;
  • it prevents the hothouse effect;
  • the timber does not split;
  • the risk of fungi is reduced;
  • the humidity level is preserved;
  • the wood does not darken and rot.

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