Fir

Abies alba
Other names: Silver fir, Sapin

Fir wood

Fir 1

General description

Fir is a typical tree growing in the shadows of higher trees. It is distributed over the whole of Europe, has a straight trunk and grows to a height of about 40 m

Wood description

The colour is white with a little tendency to grey-violette. Heartwood is not distinct from sapwood. The texture is fine to medium according to growing speed. There is no resin in the wood. The wood is similar to spruce: soft, low in weight and has medium density. Strength properties are good.
Sawing and machining is easy, also assembling. Fir also has a slight tendency to split when nailed.

Fir 2

Common uses

Fir and Spruce wood are often mixed for structural end uses, indoors and outdoors: general carpentry, interior construction, windows and doors.

Physical characteristics
Density (at 12 % moisture content) 441 kg/m3
Total longitudinal shrinkage 0.1 - 02 %
Total radial shrinkage 3.8 %
Total tangential shrinkage 7.6 %
Equilibrium moisture content
(20° C/ 37 % rel. humidity) 7.1 %
(20° C/ 83 % rel. humidity) 16.9 %
Mechanical characteristics
Modulus of elasticity under bending 11000 N/mm2
Modulus of rupture under bending 73 N/mm2
Tension strength 84 N/mm2
Compression strength 45 N/mm2
Brinell hardness perpendicular to the fibres 14 N/mm2
Janka Hardness 1.8 kN
Nail withdrawal strength in N per mm depth and mm diameter 5.0 N/mm2
Natural durability and treatability (according to en 350-2)
Fungi Class 4 - poorly durable
Dry wood borers susceptible
Termites Class S susceptible
Treatability 2 - 3 poorly to moderately permeable

Natural durability is based on mature heartwood. Sapwood must always be considered as non durable against wood destroying agents.


 
European Wood (in China)
C412, Beijing Lufthansa Center
50 Liangmaqiao Road, Chaoyang District
Beijing, P.R. China 100125
T +86 10 6462 2066, F +86 10 6462 2067
info@europeanwood.org.cn
Sino-European Wood Center
Room 202, Engineering Department,
Taoliyuan Hou, Xuhui Campus of Jiaotong University,
No.655 Panyu Road, Xu Hui District, Shanghai
Tel/Fax:021-53098550
info@europeanwood.org.cn