fig.
1.2 - click for a larger view |
The shaped pieces
of wood for the framework are now ready for assembly, so we
can proceed in the following manner.
Take a stiff sheet
of plywood or blockboard (1040mm by 400mm), which will serve as a
temporary support for the construction. At one end, with a see square,
trace a pencil line 27mm from the edge, then another line 232mm from
the first one, followed by two more lines 280mm and 258mm apart, as
shown on fig. 1.2. These lines represent the sides of the frames facing
the wider end of the body.
Secure the frames
A, B, C, and D to the temporary support by means
of blocks of wood or short rails and make sure all frames are perpendicular
to the base. When the setting is correct, place back piece F on top
of the frames, making sure that it fits exactly. A small bevel is
required on each frame, and this can easily be done with a spokeshave.
Bevel the two sides of back piece F, so that they follow the curves
of the frames. Now, screw back piece F in position (no glue yet),
and bevel the base end.
The next step is
to position side rails G in the notches. These notches, too, will
require a small bevel so that the rails fit snugly in position,' Do
this with a file, taking great care not to upset the whole structure,
which will still be weak. Alternatively, you could dismantle the whole
structure when the bevels have been marked, and secure: the frames
in the vice for filing the bevels. When the fitting is good, glue
and nail side rails G in the notches, and glue and screw back piece
F. All glueing is best done with resin glue.
