rough-cut board; construction lumber
Refers to a board that has been sawn but not planed or finished, used in construction.
Rough-cut boards were stacked at the site.
batten; tie beam
In carpentry, a horizontal structural member used to tie rafters or studs together.
Nail the batten to the beam.
Compound of 貫 (ぬき, 'horizontal tie') and 板 (いた, 'board'). The exact historical derivation is uncertain, but the term is conventionally associated with its construction uses.