Manual of Purpose-Made Woodworking Joinery

24 Joinery joints

Haunches on table- and chair- rails

Figure 3.9: Although table- and chair- making is
usually in the domain of the cabinetmaker, elements
of this work can bridge over into joinery – so joiners
should know that the surface- appearance of haunches
on rails of tables, chairs and the like is usually
regarded as aesthetically undesirable; secret (splayed)
haunches are used. An example of these is illustrated
below in Figure 3.9.

Unequal- shouldered tenon

Figure 3.10: This Figure shows the appearance of
the haunch and staggered shoulders of a so- called
unequal- shouldered tenon, when the inner edges
of the stiles and rails have been rebated, but not
moulded. Note that the projecting haunch equals the
tenon- thickness measured from the shoulder on the
rebate side (*).

Jointing technique for segmental-

shaped inner edges

Figure 3.11: When a top rail of a door has a shaped

inner- edge, as illustrated in Figure 3.11 below, double

tenons may be required (if the maximum- width- of-

tenon rule is violated), with obtuse- shaped shoulders

to strengthen the short grain created at the base of

the shaped rail. The actual angle of the short shoul-

der is geometrically a normal to the curve and its

limited length is usually controlled by the depth of

the panelling groove, rebate or moulded edge(s).

Once this depth is set out along the short line (from

prior knowledge of the edge- treatment details), this

point dictates the angle of the long splayed shoulder

that returns back to the edge of the stile at the top.

Note that the cross- section shown below displays a

so- called raised, sunk, and fielded panel. The bevelled

border is the raised part; the flat, middle area is the

fielded part, and the stepped edge around the fielded

area is the sunken part.

Figure 3.9 Mitred stub tenons with secret (splayed)
haunches.

Figure 3.10 Unequal- shouldered tenon on rebated
material.

AA

SECTION A-A

Figure 3.11 Part elevation (and horizontal section) of the

joint- arrangement for an external- type door with segmental-

shaped inner edges to the top rail.