In Castaways, does the wood from building the Mast go onto the pile right away, and can it still fill the pile in the same round?

Question

Accepted Answer

The Mast's three wood go onto the pile when the Mast is built, and they cannot be stored. Only one column can be filled per round, so any Mast wood beyond the open column is discarded. The Mast can be built only once.

Robinson Crusoe: Adventures on the Cursed Island

In Castaways, does the wood from building the Mast go onto the pile right away, and can it still fill the pile in the same round?