Step 9: Cut the Main Beams.

installing the main beams
Photo: Ryan Benyi
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Scribe and cut the main beams the same way you did for the perimeter crossbeams in Steps 5 and 6. Then apply adhesive to a beam and pressure-fit it in place, using your deadman to hold one end. Use shims to make the joints flush as needed, nailing through them and into the ceiling at every joist. Install the other main beam the same way.
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    Tools List

    • 30-foot tape measure
      Measuring tape
    • Painter's Tape
      Painter's tape
    • studfinder
      Stud finder
    • 1/8-inch drill bit
      -inch drill bit
    • drill
      Drill/driver
    • miter saw
      Miter saw
    • pneumatic finish nailer
      Pneumatic nailers (16 gauge and 18 gauge)
    • chalk line
      Chalk line with nonstaining chalk
    • Rafter Square
      Rafter square
    • small plastic putty knife
      Putty knife
    • caulk gun
      Caulk gun
    • 2½-inch sash brush
    • paintroller
      Small paint roller

    Shopping List

    1x6 primed finger-jointed pine. Get six 16-footers.

    Cove-profile shoe molding

    Panel adhesive

    2-inch 16-gauge pneumatic nails

    1 inch 18-gauge pneumatic brads

    Wood shims

    Wood glue

    Wood putty

    Latex caulk

    Semigloss paint