The Influence of Scots Pine Log Type (Pinus sylvestris L.) on the Mechanical Properties of Lumber

Forests

Piotr Mańkowski¹  Sławomir Krzosek¹  Izabela Burawska-Kupniewska¹ 

[1] Institute of Wood Sciences and Furniture, Warsaw University of Life Sciences -SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland;

关键词: scots pine timber;    mechanical properties;    MOE;    MOR;   

DOI  :  10.3390/f11121257

来源: DOAJ

【 摘 要 】

The paper presents an analysis of the influence of geographical origin and Scots pine log type on the mechanical properties of the timber sawn from them. The tested timber was sawn from logs obtained from three different forestry regions in Poland, located in the western part of the country. A batch of 150 timber pieces was obtained from each region. The cross-section had the dimensions of 40 mm × 138 mm. The timber was sawn from logs of three different types: butt, middle and top, from a fresh, mixed forest around 120 years old. The timber was dried in industrial conditions and planed four times. The values determined for the timber under research were the static modulus of elasticity in bending (MOE), and the bending strength (MOR). Moreover, timber density (DEN) was determined with the stereometric method. For all three sites, the highest average values of the tested timber properties were obtained for timber made of butt logs, and the lowest for timber made of top logs. It was concluded that the tested Scots pine properties depended on the type of log, and to limited extent, on its geographic origin. The statistical analysis revealed that the geographic origin of the logs that the tested timber was made of had a statistically significant impact on the variance of all the tested timber properties. The type of log also had a statistically significant influence on the variance of all the tested properties.

【 授权许可】

Unknown