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Location
Eastern Europe
Republic of Belarus
220040 Minsk
Nekrasov Str., 47,
3rd floor
Phones
+375 (17) 290 0667
+375 (17) 290 0668
+375 (17) 290 0669
+375 (29) 112 6168
E-mail
info@lesofabrika.com
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timber
Serra Mamuth band resaw (Germany)
Raimann multirip bench (Germany)
MuHLBOСK drying tunnel (Austria)
stockpiling
Weinig Unimat 22 N molding machine (Germany)
assorting beams before end-jointing
a group of end-jointing from Grecon Dimter Profijoint (Germany)
a vertical hydraulic press
Profimat 26 S shaping machine (Germany)
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Finland was a pioneer of using glued beam for housing construction. The wooden house building traditions combined with modern technology possibilities have brought about new industrial glued-beam technologies and original, and rather elegant, architectural solutions for a wood house made from profiled glued beams.
A wooden house is a warm house providing for rational spending on heating. In terms of thermal insulation capacity, a 20 cm wood wall is equivalent to 50 cm of brick wall. In the conditions of ever rising energy prices, this is a tangible advantage of wood housing construction.
All the merits of glued beam are due to its production process which comprises over ten stages, each of those involving special high-precision equipment. Firstly, logs are sewn into planks of the required size (since internal stress is eliminated in the process of sewing, the resultant beams will not crack or deform during further service). The planks are dried up, the process being controlled by computer, to the humidity of 10-12% (therefore, a glued beam house will practically not contract and can be finished immediately on assemblage).
Thereafter, the dried planks are calibrated using planning machines and cut into different-width billets. This operation enables to cull the planks for hidden defects that are eliminated (thus, glued wood houses are free from such wood imperfections as cracks, warps, falling-out knots). The remaining parts free from defects are tongue-joined along their length into boards (lamellas). Upon the glue drying up, these semi-finished parts are calibrated using four-side planar mills. Next, the lamellas are finally glued into beams using special hydraulic presses. From 2 to 5 lamellas can be used, thus forming beams up to 200 mm in thickness.
Special environment-friendly bi-component glue is used to join the lamellas, meeting the international DIN EN 204, class D4 requirements which does not affect the “breathing” ability of wood.
One more feature of glued beam consists in that the direction of wood grain, or “rings” as they are called, in the lamellas is set to be opposite. This adds up strength to the glued wood as against regular wood, moreover, there is no warping even when humidity changes.
Once the lamellas are joined into beams, the beams are profiled using four-side planers. This is one of the most crucial moments in the manufacturing process, as accuracy of the mortise and tenon connection determines quality of the beam and, finally, quality of the entire house.
Upon profiling, beams are trimmed to lengths, i.e. cut into very precise sizes. The final operations in manufacturing the beams comprise cutting the corona grooves using a special cutting lathe, permeating them with antiseptic by complete dipping, and marking in accordance with the specification.
A glued beam house will be delivered to the construction site as a kit ready for erection. The assemblage is as simple as a meccano game.
machining center module with NC from KRUSIMATIC G1 (Switzerland)
element of the fabricated wall
packed beams
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