Stepstool seat¶

from woodwright.examples import projects

design = projects.stepstool_seat(length=500)

seat    400 x 140 x 20 mm  oak, 2 pieces: seat_1, seat_2
        - 2 x dovetail socket 86.75 mm at the face, 6.5 deep, 1:4, in bottom_face
batten  280 x 90 x 26.5 mm  oak, 2 pieces: batten_left, batten_right
        - dovetail tongue 86.75 mm wide at the shoulder, 6.5 deep, 1:4, on top_face

def stepstool_seat(
    length: float = 400,
    depth: float = 280,
    boards: int = 2,
    batten_width: float = 90,
    batten_inset: float = 30,
    slope: float = 4,
    stock: Stock = OAK,
) -> Assembly:
    """The seat of a stepstool: boards edge to edge, two battens underneath
    across the grain, in wide, shallow sliding dovetail housings.

    The battens lie flat, `batten_inset` in from the ends, and keep the seat
    flat and its boards together, even without glue; not glued, they let it
    shrink and swell across its grain. Each batten's whole width goes into a
    housing a third of the seat deep, its edges bevelled by 1:`slope`, and
    runs across all the boards, housed in each of them. The housings run
    through, out of the front and the back edges, where the battens' ends
    are flush with the seat's. The battens are wide enough for the legs'
    through tenons (see `stepstool`), which cross their grain.
    """
    asm = Assembly("stepstool_seat")
    _stepstool_seat(asm, length, depth, boards, batten_width, batten_inset, slope, stock)
    return asm