## 3 Results and Discussion
* A good correlation between the density and the bending properties of the solid wood samples was noticed, as mentioned in reference [7]: the bending properties increased with increasing density from the central part of the log towards the outer area, as illustrated in the example given in Figure 7, based on the data obtained from Log N\({}^{\circ}\)1 samples, tangentially loaded; dissimilarly, the glued samples (represented with \"x\" and bold values in Figure 7) had lower bending properties despite having higher density (due to the presence of the adhesive);
* As far as the influence of the position within the tree height is concerned, no major difference was noticed between the values obtained from the butt logs compared to the top logs for the density of the solid wood samples, which is also in good accordance with data from reference [7]; the MOR and MOE values for solid wood are less uniform; there is a clear decreasing tendency of both parameters from butt to top, as illustrated in the example given in Figure 8, based on the data obtained from Log N\({}^{\circ}\)1 samples, radially loaded; the glued samples obtained from the same log (represented with \"x\" in Figure 8) showed very close density, lower MOR and MOE at the butt, and visibly higher MOR and MOE at the top, compared to the solid wood samples. \begin{table}
\begin{tabular}{l l c c c} \hline \hline \multirow{2}{*}{**Log/Type of Samples**} & **Position within** & \multicolumn{2}{c}{**Position over Tree Length**} & \multicolumn{1}{c}{**Cummulated Mean**} \\  & **Cross Section * & **Lower Part** & **Upper Part** & **and STDEV** \\ \hline Log N\({}^{\circ}\) 1 & & & & \\ \hline \multirow{6}{*}{Solid wood (tangentially loaded)} & Core zone & 65.27 \(\pm\) 3.00 & 70.47 \(\pm\) 9.22 & 67.87 \(\pm\) 6.11 \\ \cline{2-5}  & Middle zone & 80.82 \(\pm\) 4.56 & 72.73 \(\pm\) 6.67 & 76.78 \(\pm\) 5.62 \\ \cline{2-5}  & Outer zone & 94.34 \(\pm\) 3.55 & 91.72 \(\pm\) 10.97 & 93.03 \(\pm\) 7.26 \\ \cline{2-5}  & Mean and STDEV & 83.1 \(\pm\) 11.73 & 81.21 \(\pm\) 12.25 & 82.16 \(\pm\) 11.99 \\ \hline \multirow{6}{*}{Solid wood (radially loaded)} & Core zone & 61.09 \(\pm\) 3.65 & 58.68 \(\pm\) 6.39 & 59.89 \(\pm\) 5.02 \\ \cline{2-5}  & Middle zone & 65.52 \(\pm\) 4.44 & 70.46 \(\pm\) 5.63 & 67.99 \(\pm\) 5.04 \\ \cline{2-5}  & Outer zone & 88.49 \(\pm\) 6.78 & 79.82 \(\pm\) 4.62 & 84.16 \(\pm\) 5.70 \\ \cline{2-5}  & Mean and STDEV & 73.82 \(\pm\) 13.48 & 71.83 \(\pm\) 9.47 & 72.83 \(\pm\) 11.48 \\ \hline Edge-bonded boards (at 45\({}^{\circ}\)) & Outer zone & 82.98 \(\pm\) 5.63 & 81.12 \(\pm\) 4.82 & 82.05 \(\pm\) 5.23 \\ \hline Log N\({}^{\circ}\) 2 & & & & \\ \hline \multirow{6}{*}{Solid wood (tangentially loaded)} & Core zone & 61.28 \(\pm\) 2.67 & 61.14 \(\pm\) 0.73 & 61.21 \(\pm\) 1.70 \\ \cline{2-5}  & Middle zone & 65.34 \(\pm\) 6.89 & 71.14 \(\pm\) 8.87 & 68.24 \(\pm\) 7.88 \\ \cline{2-5}  & Outer zone & 94.89 \(\pm\) 3.94 & 81.34 \(\pm\) 6.35 & 88.12 \(\pm\) 5.15 \\ \cline{2-5}  & Mean and STDEV & 76.35 \(\pm\) 16.44 & 73.27 \(\pm\) 10.12 & 74.81 \(\pm\) 13.28 \\ \hline \multirow{6}{*}{Solid wood (radially loaded)} & Core zone & 61.01 \(\pm\) 0.96 & 61.94 \(\pm\) 3.68 & 61.48 \(\pm\) 2.32 \\ \cline{2-5}  & Middle zone & 66.63 \(\pm\) 4.01 & 69.38 \(\pm\) 5.67 & 60.97 \(\pm\) 4.84 \\ \cline{1-1} \cline{2-5}  & Outer zone & 85.04 \(\pm\) 4.33 & 75.45 \(\pm\) 7.22 & 80.24 \(\pm\) 5.78 \\ \cline{1-1} \cline{2-5}  & Mean and STDEV & 72.87 \(\pm\) 11.08 & 70.32 \(\pm\) 7.66 & 71.59 \(\pm\) 18.74 \\ \hline Edge-bonded boards (at 45\({}^{\circ}\)) & Outer zone & 85.85 \(\pm\) 9.22 & 77.76 \(\pm\) 4.68 & 81.81 \(\pm\) 6.95 \\ \hline \hline \end{tabular}  
* The position within the cross section referred to in Tables 3–5 has the following meaning: core zone = H3, middle zone = H2 and H4, outer zone = all other pieces of lumber (S1 and S2 for solid wood, and 1–10 for bonded parts) (see Figure 2).  
\end{table} 
Table 5: Bending strength MOR\({}_{12}\) (in N/mm\({}^{2}\)) of solid and glued spruce samples.