Screw the 40-inch boards at a 90-degree angle to the standing posts. Standard bat rack posts can be any length but should have a thickness of about four inches. Make sure the boards, which give support to the posts and cross-boards, are secured firmly to the posts. Once you have these boards screwed into place, it should appear like a square, with a post at each corner, if looking from above.
Sand the 40-inch-12-inch piece of wood with a piece of sandpaper. These “cross-boards” will be parallel lines within the square. These dimensions are typical of a bat rack, but can be larger or smaller depending on the rack’s function and the number of bats.
Notch 4-inch-wide and 2-inch-deep slots on two of the 40-inch-by-12-inch piece of wood. These two pieces of wood run length-wise and cradle the bats in the rack. The number of slots should correspond to the number of bats you have.
Paint all the boards with wood stain varnish, in a well-ventilated area.
Attach the 40-inch-by-12-inch boards to the 40-inch boards, with wood screws. Check that the boards are firm and secure.
Add short messages, identifying each bat, along the front of the bat rack. This is particularly useful if the bats have some historical importance.