Effect of compression wood and grain angle on deformations of studs from 22-year-old Scots pine trees

Sammanfattning

The effect of compression wood, spiral grain and grain angle on deformations of studs from 22-yr-old Scots pine trees was studied. Spiral grain angle was measured on the mantle surface of logs and grain angle on the tangential faces of studs. Bow, spring and twist were measured on studs at green condition and at 18% and 12% moisture content. From each stud four 3 mm thick cross-sections were sawn. The compression wood content and its position within cross-sections were analysed using image analysis. For the short sections, located between cross-sections, bow and spring, but not twist, were significantly correlated with the amount and the position of the compression wood content. Twist was significantly correlated with spiral grain angle and grain angle. In Conclusion, this study suggests that the compression wood content and its position within cross-sections have an effect on deformations such as bow and spring. It is however, evident that the spiral grain angle and the grain angle have a major effect on twist deformations

Publicerad i

Scandinavian Journal of Forest Research
2004, volym: 19, sidor: 48-54
Utgivare: TAYLOR & FRANCIS AS

SLU författare

• Rune, Göran

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

• Warensjö, Mats

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Skogsvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1080/02827580410017843

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/3261