(57) Structure (2) for preventing warping of solid-wood board (1,1'), said structure consisting
of a slot array fitted in the board and a stiffening element array fitted therein.
The slot array consists of two or more successive sub-slots (3,5,7) of a length substantially
shorter than the length of the slot array as a whole, in which the stiffening elements
(4,6,8) forming the stiffening element array are fitted. Any two successive sub-slots
are placed at a distance from each other with respect to their longitudinal centre
axis. Moreover, any two successive sub-slots are disposed in an overlapping arrangement
relative to each other so that a portion of one sub-slot lies longitudinally side
by side with a portion of another sub-slot successive to it.
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