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ESSENTIAL JOINERY

Butt Joints | REINFORCING FLAT MITER JOINTS

1A

1B

MITER REINFORCEMENT Using SPLINES

TOOLS

Tablesaw, tenoning jig,

or router table with slot bit

and miter gauge

Push pad

Adjustable square

Sandpaper

Clamps

Flush trim saw

1A. Tablesaw using tall fence:

With a piece of sheet good for

support, a mitered workpiece

can be clamped at 45° and

pushed over the blade to create

a spline slot.

1B. Tablesaw with tenoning jig:

With the back fence at 45°, the

tenoning jig makes quick work

of cutting a spline slot on a

mitered workpiece.

While keys are cut into the frame after the glue-up, splines are cut in

the mitered pieces before the glue-up. The spline is a small strip of

wood that helps keep the joints aligned and lends additional strength.

There are three primary ways to cut them.