Thick rail tenons¶

from woodwright.examples import joints

design = joints.thick_rail_tenons()

post  500 x 70 x 70 mm  oak
      - 2 x mortise 30 x 10 mm, 47 deep, in back_edge
rail  345 x 45 x 45 mm  oak
      - 2 tenons 30 x 10 mm, 45 long, 10 apart across the thickness, on left_end

def thick_rail_tenons() -> Assembly:
    """A thick, square rail (e.g. a bench stretcher) tenoned into a post with
    two tenons one beside the other across its thickness.

    A single tenon a third of the rail thick would be weak in a square
    rail, a thicker one would leave thin mortise walls; two thinner tenons,
    each in its own mortise, give twice the glue area and keep the wood
    between them. Each is as thick as the gap between them and the
    shoulders, about a fifth of the rail; the shoulders at the edges are as
    deep as those at the cheeks.
    """
    return _post_and_thick_rail("thick_rail_tenons", tenons=1, thickness_tenons=2, shoulder=7.5)