|Project by Sir_Robert||posted 04-07-2009 09:02 PM||22598 views||37 times favorited||19 comments|
Use a pair of these home-made box framing jigs to make dead-on 90-degree joints. Each jig body is made from two thicknesses of 3/4” MDF sandwiched between two corner mending plates. Use 1/4-inch machine screws or hex bolts, lock washers and hex nuts to hold the sandwiched parts together. The MDF must be trimmed back such that it is recessed about a 1/64-inch from the edges of the corner plates. Make sure the corner plates are squared and trued to each other before tightening the bolts.
Drill a hole through each leg of the fixture to accept the pin of a fence clamp. Make sure the hole is far enough away from the corner to allow easy access for your drill, router or other fastening tool while the jigs are in place.
-- Sir Robert