The application of laminated wood structures in the building trade in Yugoslavia is gaining increasing interest. Therefore, in addition to applying present-day methods of scientific experiment planning, it is necessary to examine the influence of some technological factors on the quality of glued joints.
When choosing influential factors, attention has been given to existing conditions in direct production. The influential factors considered were moisture content at three levels, microclimate in the plant, type of glue, and specific glue coat at two levels.
Using a factorial plan of experiment 3 × 2, the extent of influences of individual factors and their interactions on the quality of gluing laminas of fir/spruce has been examined. Laminas were taken from direct production and prepared in the usual manner. Three laminas in the size 1000 x 200 x 34 mm were glued together in a sample.
Shearing strength, shearing on the wood, and penetration of glue into the wood were used as criteria for estimating the quality of gluing. The results obtained were analyzed using mathematical and statistical methods. At the level of probability 0.01, the factors that showed significant influence were moisture of wood, type of glue, specific coat of glue, and some of their interactions. With this experiment plan, a total of 72.67% of influences of all factors have been explained.
