12' x 20' timber frame pergola kit installed over backyard patio for shade. the dovetail difference gives these shade structures a remarkable 160 wind rating; these structures are architecturally more responsible, integral, with increased resilience to seismic shifting, powerful coastal storms, high winds, and heavy mountainous regions.
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steps: 2. cut joist beams from 2' x 10' boards to span the pergola posts. to create a decorative look on the end of the joist beams, draw a straight or curved design on the wood and cut along the line with a jigsaw. temporarily clamp in place while holes are drilled through the beams and posts. attach the beams to the posts using 3' lag bolts.
how to build a 12×16 pergola. fit the support beams to the top of the posts. use a spirit level to plumb the support beams and then clamp the beams into place tightly. drill pilot holes through the beams and through the posts. insert the 9 carriage bolts and then tighten the nuts.
how to build a 16×16 pergola. dig 2-3 deep holes and 14 in diameter and then compact a layer of gravel to the bottom. fit the 12 tubes and set the 4×4 posts into place. use a spirit level to plumb the posts and then secure them into place with temporarily braces. pour the concrete in the tube forms and let it dry out for several days.
on a standard 10 x 10 pergola we use about 8 purlins that is enough to space the boards out about 16 on center. once again you will also want to have a design on the end. we like to mimic whatever end design we used on the header boards so it matches the purlins.
building your pergola. header boards your pergola will need a set of double-header boards that attach to each side of the post and are secured by 10 bolts. we use 2 x 8 or 2 x 10s for our header boards they add strength and a great look to the piece. you will need a total of 4 header boards for the pergola.
louvered wall panels. add on a louvered wall panel to any side of your breeze pergola. panels are easy to assemble. louvered panels are shipped in kit form and must be assembled on site. pieces must be ordered at time of pergola order and must ship with pergola.
the big kahuna 10×16 pergola kit comes standard with: double 2×8 beams. 2×8 mortised notched rafters. 6×6 mortised posts. 2×6 decorative angle braces. 2×2 top slats. stainless steel hardware. optional galvanized post mounting hardware.
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