Abstract
Wood has been a favourite construction material since the ancient times because of its natural beauty and excellent properties, such as high specifi c strength, heat insulation and ease of handling and processing. It was also used in Safranbolu, where Turkish Ottoman civil architectural samples have been carefully protected and preserved without losing their originality. It was inscribed to “The World Heritage List” by UNESCO in 1994. In this study, density, Brinell hardness and compression strength perpendicular to the grain of Scotch pine (Pinus Sylvestris Lipsky.) wood, from the fl oor joist of 10 different demolished historical Safranbolu houses for 10 different years, were determined and compared with those of wood from freshly cut trees. The highest decrease in compression strength perpendicular to the grain of salvaged Scotch pine wood used as fl oor joist for 210 years was nearly 27 percent lower than those of wood from freshly cut Scotch pine. The results indicate that the physical properties, Brinell hardness and compression strength perpendicular to the grain of the Scotch pine wood were signifi cantly affected by the 210-year service life.
Highlights
The results indicate that the physical properties, Brinell hardness and compression strength perpendicular to the grain of the Scotch pine wood were significantly affected by the 210-year service life
The aim of this study is to investigate the effect of 10 different years of service life on some physical and mechanical properties of Scotch pine wood used as floor joist in historical Safranbolu houses in order to determine changes related to services life
For Scotch pine wood used in Safranbolu houses, the decrease in air-dry and oven dry density was approximately percent and percent, respectively
Summary
Wood is a naturally durable material that has been recognized for centuries throughout the world for its versatile and attractive engineering and structural properties. The aim of this study is to investigate the effect of 10 different years of service life on some physical and mechanical properties of Scotch pine wood used as floor joist in historical Safranbolu houses in order to determine changes related to services life. Where Mo is the oven-dry weight (g) and Vo is the dry volume (cm3) of wood Both salvaged and freshly cut Scotch pine wood specimens, used to determine mechanical properties, were exposed to 20 °C ± 2 °C and 65 ±5 percent relative humidity (RH) until a moisture content (MC) of approximately 12 % before the specimens were tested. The load required was recorded in kgf and reported as Newton (N)
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