Step 19: Install the Purlins

installing the purlins
Photo: Kolin Smith
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Lay evenly spaced 2x2 purlins across the top of the assembly so that the outermost ones are flush with the bottom edges of the rafter tail profiles, as shown. Secure them by driving 3-inch screws through the purlins and into the top edges of the rafters.
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    Tools List

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    • sledge hammer
      sledgehammer
    • miter saw
      miter saw
    • jigsaw
      jigsaw
    • drill
      drill/driver and 1-inch paddle bit
    • caulk gun
      caulk gun
    • four-foot level
      4-foot level
    • hand clamps
      clamps
    • combination square
      combination square
    • flexible curves
      flexible curve to draw profile for rafter tails

    Shopping List

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    All lumber listed is western red cedar.

    2x4s Get twelve 8-foor boards.

    1x4s Get at least four 8-foot boards.

    1x2s Get at least nine 8-foot boards. 2x6s Get three 8-foot boards.

    2x2s Get two 8-foot boards or five 4-foot spindles for the purlins.

    ¼-inch spacers cut from scrap.

    Post anchors Get four.

    Construction adhesive

    Stainless-steel trim-head screws You need three sizes: 1¼ inch, 2⅝ inch, and 3 inch.