Southern yellow pine
Scientific name:
Pinus taeda L. ; P. elliotis Engelm; P. echinata Mill; P. palustris Mill.
Geographic origin:
Southeastern United States.
- Sapwood: yellowish white colour.
- Heartwood: reddish brown.
- Fiber: straight.
- Grain: medium size.
- Characteristic defects: knots, resin bags, resin impregnations and young style wood.
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Capacity of being impregnated
- Sapwood: medium to low capacity of being impregnated.
- Heartwood: no capable of being impregnated.
Mechanical properties
Resistance to static flexion 975 kg/cm2.
Elasticity module 130,000 kg/cm2.
Resistance to compression 492 kg/cm2.
Elasticity module 130,000 kg/cm2.
Resistance to compression 492 kg/cm2.
Mechanization
- Sawing process: easy, except in those cases of resin's excess.
- Drying process: easy and fast. Low risk of deformations and crack formation. Resin exudations.
- Planing process: easy. Risk of weakening due to the presence of resin.
- Gluing process: difficulties can arise due to the presence of resin.
- Nailing and screwing process: Pre-drilling is required.
- Finish: difficulties can arise due to the presence of resin. A blending agent should be applied in order to homogenize wood.
Physical properties
- Apparent density at 12% humidity 450 kg/m3 semi-light wood.
- Dimensional stability
- - Volumetric contraction coefficient 0.41 % stable wood.
- - Relation between contractions 1.6% no tendency to deformity.
- Hardness (Chaláis-Meudon) 2.4 semi-softwood.
Observations
Pot presentar àmplies zones de resina, enteiament