C Purlin Pergola
Set the purlins on the chalk line pre drill the holes and secure with galvanized wood screws.
C purlin pergola. Pvc pergola purlin the true size is 1 1 2 x 1 3 4 in various lengths. Don t forget to paint all the lumber for this project while it s still on the ground. As the pergola takes shape you ll notice that the roof looks familiar. Our pvc purlins do not require painting as we make them by folding and laminating four panels of pvc.
The purlins for this project are 2 x 4s that are ripped sawed down the center. The final layer of lumber on this project was the 2 4 purlins that were installed vertically over the rafters at 90 degrees essentially forming a grid. Toe nailed over the rafters the two outermost purlins on the sides of the pergola are fastened so they align on top of the outermost girders. To make sure they were super sturdy we cut the 2 3 boards so they broke over a pergola cross beam.
Always put your purlin caps in before you try to slide them through. Pergola beams a 28 foot 4x8 architectural c grade kiln dried red cedar beam that would bear on the wall plate needed to be installed above the roof. So each purlin had to be measured to make sure the cuts with the saw were braced on the center of the beams see where the extra set of hands comes in nicely. Mike lovewell explains how to install the purlins shade pieces on the top of your pergola.