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Western Hemlock (Tsuga heterophylla (Raf.) Sarg.) belongs to the Pinaceae family and comes from the west of the United States and Canada.
Durability
The heartwood is not very durable (natural durability class IV). The sapwood is not durable (natural durability class V).
Wood-working and drying
Western Hemlock dries easily and is easy to work. It has no resin pockets.
Finishing
Finishing Western Hemlock poses no problems. For supporting interior structures, preservation in accordance with procedure A2.1 is needed.
Average density*
450 kg/m³
Radial shrinkage
60 to 30% r.v.**
1,1%
90 to 60% r.v.**
1,0%
Tangential shrinkage
1,6%
Wood-working
2,7%
2,6%
Modulus of elasticity
9000 N/mm²
* at a wood moisture content of 15 per cent / ** relative atmospheric humidity