## 3 Results and Discussion  
Table 3 presents the results regarding the density of the samples taken both from the solid boards and from the glued boards. For the solid wood samples, the values are given separately for the tangentially and radially loaded samples in order to facilitate the upcoming correlation to the bending test results presented in Table 4 (MOE\({}_{12}\)) and in Table 5 (MOR\({}_{12}\)). By analyzing the results presented in Tables 3-5, the following were observed:  
* The values obtained within this research for the solid wood samples are in good accordance with the values from reference literature (given in Table 1); the density of solid wood increases from core to outer zone due to the fact that the annual rings become narrower, and the proportion of earlywood decreases;
* The comparative results concerning the influence of the load direction relative to the annual rings (tangential load vs. radial load--see Tables 4 and 5) for the solid wood samples shows that the tangential load leads to 10% higher values of MOE and MOR compared to the radial loading; this can be explained by the much lower number of pits in the tangential than in the radial walls of the tracheids, which makes resinous wood more resistant to tangential loads; \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 & 420.33 \(\pm\) 1.15 & 436.67 \(\pm\) 22.01 & 428.50 \(\pm\) 11.58 \\ \cline{2-5}  & Middle zone & 449.67 \(\pm\) 19.83 & 442.67 \(\pm\) 22.78 & 446.17 \(\pm\) 22.64 \\ \cline{2-5}  & Outer zone & 495.55 \(\pm\) 20.55 & 495.53 \(\pm\) 43.39 & 495.54 \(\pm\) 32.35 \\ \cline{2-5}  & Mean and STDEV & 462.50 \(\pm\) 34.79 & 462.57 \(\pm\) 41.37 & 462.53 \(\pm\) 38.08 \\ \hline \multirow{6}{*}{Solid wood (radially loaded)} & Core zone & 416.85 \(\pm\) 6.80 & 400.67 \(\pm\) 7.43 & 408.76 \(\pm\) 7.12 \\ \cline{2-5}  & Middle zone & 428.39 \(\pm\) 16.18 & 464.27 \(\pm\) 15.09 & 446.33 \(\pm\) 15.64 \\ \cline{2-5}  & Outer zone & 501.24 \(\pm\) 18.58 & 488.95 \(\pm\) 27.72 & 495.09 \(\pm\) 23.40 \\ \cline{2-5}  & Mean and STDEV & 455.22 \(\pm\) 41.89 & 461.42 \(\pm\) 38.50 & 458.32 \(\pm\) 40.19 \\ \hline Edge-bonded boards (at 45\({}^{\circ}\)) & Outer zone & 504.14 \(\pm\) 18.94 & 496.85 \(\pm\) 13.76 & 500.50 \(\pm\) 16.49 \\ \hline Log N\({}^{\circ}\) 2 & & & & \\ \hline \multirow{6}{*}{Solid wood (tangentially loaded)} & Core zone & 411.33 \(\pm\) 13.01 & 407.33 \(\pm\) 33.50 & 409.33 \(\pm\) 23.26 \\ \cline{2-5}  & Middle zone & 433.83 \(\pm\) 12.32 & 427.00 \(\pm\) 35.22 & 430.42 \(\pm\) 23.77 \\ \cline{2-5}  & Outer zone & 517.02 \(\pm\) 25.73 & 469.20 \(\pm\) 9.86 & 493.11 \(\pm\) 17.80 \\ \cline{2-5}  & Mean and STDEV & 462.62 \(\pm\) 50.01 & 439.85 \(\pm\) 36.13 & 451.24 \(\pm\) 43.07 \\ \hline \multirow{6}{*}{Solid wood (radially loaded)} & Core zone & 407.20 \(\pm\) 10.14 & 396.36 \(\pm\) 17.37 & 401.78 \(\pm\) 13.76 \\ \cline{2-5}  & Middle zone & 423.33 \(\pm\) 12.33 & 438.19 \(\pm\) 25.16 & 430.76 \(\pm\) 18.75 \\ \cline{1-1} \cline{2-5}  & Outer zone & 492.31 \(\pm\) 41.10 & 472.58 \(\pm\) 12.02 & 482.45 \(\pm\) 26.56 \\ \cline{1-1} \cline{2-5}  & Mean and STDEV & 447.70 \(\pm\) 46.16 & 443.58 \(\pm\) 34.22 & 445.64 \(\pm\) 40.19 \\ \hline Edge-bonded boards (at 45\({}^{\circ}\)) & Outer zone & 518.12 \(\pm\) 22.40 & 508.38 \(\pm\) 24.91 & 513.75 \(\pm\) 23.55 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Density \(\rho_{12}\) (in kg/m\({}^{3}\)) of solid and glued spruce samples.