I came across a problem recently when I needed to glue edging to the ends of a long table. The problem was that the table was longer than my pipe clamps. So I came up with this simple technique that uses C-clamps and wedges to hold the edging in place while the glue dries, see Drawing. To do this, first attach the C-clamps to the edge of the tabletop. (To ensure a good glue joint, space the clamps about 6" apart.) And to get the proper clamping pressure on the joint line, tap a small wedge between the edging and each clamp until the edging is tight. Note: This also works for attaching counter top edging.
Ted's Woodworking - Guide eBook