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SOFTWOOD:
LARCH |
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| NAMES: |
Larch, European Larch |
| BOTANICAL NAME: |
Larix decidua
Mill. |
| ORIGIN AND SPREAD: |
Central Europe;
The Alps, The Carpathian Mountains , South- and Southwest Poland,
cultivated in America |
| MACROSCOPIC CHARACTERISTIC
FEATURES: |
Boarder of annual
rings very clear; transition from Spring-wood to Summer-wood clear
within one year, Sapwood yellowish-white, Heartwood dark red (getting
darker) |
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IMPORTANT TECHNOLOGICAL FEATURES:
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Dry density (grams/cbm) 0,40
0,55 0,80
Volume shrinking tolerance (in %) 11,4 15,0
Pressure strength (Newton/qm) 41 55 80
Bending strength (Newton/qm) 64 89 132
Tensile strength (Newton/qm) 90 100 107
E-Module 6 300 13 800 20 000
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PROCESS
AND USE:
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Good to saw, to plane, to smoothen;
its recommended to drill holes before nailing in wood; dries
good; low tendency to tear and warp; before staining a pre-treatment
with resin thinner is needed
Construction wood for inside and
outside, window frames, staircases; for mining industry; bridge
building and hydraulic engineering
Good natural durability (also in water);
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| SPECIFIC
CHARACTERISTICS: |
Approx. 17 Larix kinds are known
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