Screwed batten¶

from woodwright.examples import joints

design = joints.screwed_batten(screw_length=37.5)

board   500 x 150 x 20 mm  oak
        - 2 x pilot hole ø3, 10 deep, drill point 118 deg, in top_face, 90 and 410 from left_end; centered, for a 4 x 30 screw
batten  400 x 60 x 20 mm  oak
        - 2 x clearance hole ø4.5, countersunk ø8, 90 deg, in top_face, 40 from left_end and right_end; centered, for a 4 x 30 screw

def screwed_batten(screw_length: float = 30) -> Assembly:
    """A batten screwed to a board (e.g. the ledge of a door, seen from the
    back), two 4 mm screws in countersunk clearance holes."""
    asm = Assembly("screwed_batten")
    board = asm.add(Board("board", OAK, length=500, width=150))
    batten = asm.add(Board("batten", OAK, length=400, width=60))
    asm.join(Butt(board.top_face, batten.bottom_face, across=CENTERED))
    for end in (batten.left_end, batten.right_end):
        asm.join(Screw(batten.top_face, into=board, length=screw_length, at={end: 40}))
    return asm