board
board or boards
ramp
It is 7/w.
Any solid object. 'Cuboid' means 'cube like'. A selection of cubic shapes is an house brick, a plank of wood,
More information is needed. The plank has a length, width and height and you only gave 2 dimensions. Also we would need something like the density of the plank.
board
board
board or boards
Board.
board
'Board' must be the answer you are looking for.
Board
Board.
Planking. As in acting like a plank of flat wood.
The plank was of wood, a few inches wide
its stronger than a wood plank, and that means it can be thinner, therefore lighter
A plank.