Hemlock
Scientific name:
Tsuga heterophylla Sarg.
Geographic origin:
West Coast of North America
- Sapwood: lightly whitter than heartwood.
- Heartwood: light brown.
- Fiber: straight and rarely wavy.
- Grain: medium size to rough.
- Characteristic defects: small lively knots.
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Capacity of being impregnated
- Sapwood: medium capacity of being impregnated.
- Heartwood: low capacity of being impregnated.
Mechanical properties
- Resistance to static flexion 780 kg/cm2.
- Elasticity module 108,000 kg/cm2.
- Resistance to compression 450 kg/cm2.
Mechanization
- Sawing process: easy with no difficulties.
- Drying process: slow but easy to carry out, cracks and deformations are not frequent.
- Planing process: no difficulties.
- Gluing process: no difficulties.
- Nailing and screwing process: no difficulties.
- Finish: no difficulties.
Physical properties
- Apparent density at 12% humidity 480 kg/m3 light wood.
- Dimensional stability
- - Volumetric contraction coefficient 0.41 % stable wood.
- - Relation between contractions 1.75% no tendency to deformity.
- Hardness (Chaláis-Meudon) 1,4 softwood.
Observations
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Ocasionalment pot presentar bosses de resina
