- Measure the side of each beam with the tape measure. Make a mark every 12 inches down the center of the beams with the pencil.
- Drill a hole half the length of the dowel on the marks you made in Step 1, using the power drill.
- Fill each hole on one beam, at least ¼ of the way, with wood glue. Repeat this step on the other beam.
- Insert a dowel into each hole on one of the beams. Tap with the hammer to force each dowel into the hole.
- Lift up each beam up and place them on their side. Align the dowels on the one beam with the holes on the other. Push the two boards together.
- Tap the beams together at the location of the dowels with the rubber mallet. Wait at least 12 hours for the wood glue to dry.
Using Through Bolts
- Place one beam on top of the other and measure the width of the two beams with the tape measure.
- Measure the top beam and make a mark every 12 inches, down the center, with the pencil.
- Drill a hole through the combined beams on the marks you made in Step 2.
- Insert a through bolt into each of the holes. Tighten, by hand, a nut onto each through bolt. Secure the nuts to the bolts with the socket wrench.
Things You Will Need
- Tape measure
- Power drill
- Wood glue
- 3-inch dowels
- Rubber mallet
- Through bolts
- Socket wrench
- Lag bolts can connect beams that are not used to support a structure.