Fir

Scientific name: Picea abies Karst

Geographic origin: Center, south and north of Europe.

Description

·Sapwood: yellowish white.

·Heartwood: reddish yellow.

·Fiber: right.

·Grain: from medium to small size.

·Characteristic defects: it has many small, healthy, and lively knots.

 

Capacity of being impregnated

  • Sapwood: low capacity of being impregnated.

  • Heartwood: no capable of being impregnated.

Mechanization

  • Sawing process: easy and with no difficulties.
  • Drying process: fast, with risk to crack formation.
  • Planing process: no difficulties.
  • Gluing process: good.
  • Nailing and screwing process: tendency to crack formation. Little resistance to be pulled away.
     

Physical properties

  • Apparent density at 12% humidity 450 kg/m3 light wood.
  • Dimensional stability
  • - Volumetric contraction coefficient 0.44 % stable wood.
  • - Relation between contractions 2.1% bending tendency.
  • Hardness (Chaláis-Meudon) 1.5 softwood .

Fir

Mechanical properties

  • Resistance to static flexion: 710 kg/cm2
  • Elasticity module: 110,000 kg/cm2
  • Resistance to compression: 450 kg/cm2

Fir

Observations

Fir