11.Wooden boards belonging to a private individual which are not set aside
to be sold, may be handled on Shabbos (1). [In contrast,] boards belonging
to a carpenter are forbidden to be handled unless it was his intention on
Friday to use them on Shabbos (2).
(1) For use as a serving tray or some other purpose.
(2) Utensils that a person would not consider using for anything other than
their primary function, out of a concern that they might get damaged, fall
under the category called "muktzeh machamas chesron kiss" ("muktzeh due to
[potential] financial loss"). Items in this category may not be handled
even to use the body of the object for a permitted activity ("Tzorech
Gufo"), or because one needs the space they are resting in ("Tzorech
Mekomo") (See HY:88:6).