Mortise tenon¶

joints.mortise_tenon

A rail tenoned into the back edge of a stile, centered along it (T-joint).

Mortise tenon, assembled

Mortise tenon, exploded

Parameters¶

Parameter	Default
`stile_length`	`600`
`rail_length`	`300`
`width`	`60`
`stock`	20 mm board, oak

Change them in a design file (see Change an example):

from woodwright.examples import joints

design = joints.mortise_tenon(stile_length=750)

Drawings¶

The plans in one PDF: plans.pdf.

Assembly

Parts

Rail

Stile

Cut list¶

stile  600 x 60 x 20 mm  oak
       - mortise 50 x 8 mm, 42 deep, in back_edge
rail   340 x 60 x 20 mm  oak
       - tenon 50 x 8 mm, 40 long, on left_end

Code¶

From woodwright/examples/joints.py, which imports the names it uses (see From an example to your own design):

def mortise_tenon(
    stile_length: float = 600,
    rail_length: float = 300,
    width: float = 60,
    stock: Stock = OAK,
) -> Assembly:
    """A rail tenoned into the back edge of a stile, centered along it (T-joint)."""
    asm = Assembly("mortise_tenon", root_location=STANDING)
    stile = asm.add(Board("stile", stock, length=stile_length, width=width))
    rail = asm.add(Board("rail", stock, length=rail_length, width=width))
    asm.join(MortiseTenon(tenon=rail.left_end, mortise=stile.back_edge))
    return asm

Exported with woodwright 0.9.0 on 2026-10-25.