1875 17 July 31 The hack planks are board platforms constructed of three longitudinal boards.
1882 16 Sept. 8/2 Brickmakers' plant and stock, comprising a large quantity of hack caps, hack planks.
1968 24 12 A ‘third’ of brick..had to be picked up, or ‘hacked’, when dry, onto a three-inch by ten-inch hack plank.