step 7. attach two of the 20 foot 1-by-6 boards to each of the 4-by-4 pergola posts for the side beams. place the first two boards on the left and right side of one of the 4-by-4 posts. repeat this process for the other 4-by-4 post.
find the center of the board. mark each end, allowing for an overhang. mark both sides of the board from the center. fasten rafters to cross beams with 2½ inch galvanized screws. stain the pergola to the same stain as your deck. safety first. when building a project like the pergola, always use safety gear.
when you anchor the posts, take into consideration the strength youll need to keep the pergola upright and resistant to natures forces. winds, snows and ice can ruin a poorly built structure. use lag bolts to anchor the posts to the deck and within the anchor itself. here is a link to the anchors i chose.
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how to attach a pergola to a deck - quora there are several ways to attach a pergola to a deck but they all depend on the size of your pergola and the construction of your deck. if possible
a pergola like this looks best on a larger deck, one at least twice the size of the pergola. if you have doubts,mock up the corners with braced 2x4s; stand back and imagine the rest. if necessary, alter the slope of the rafters to match your house.
step 6 - attach the rafters. the five 2'x6'x10' cedar boards will be placed equidistant on the pergola. find the center of the board. mark each end, allowing for an overhang. mark both sides of the board from the center. fasten rafters to cross beams with 2½ inch galvanized screws. stain the pergola to the same stain as your deck. safety first
drill holes into the patio at the postmarks with a hammer drill and place lag bolt sleeves into the holes. attach adjustable post brackets to the patio with 1/2-inch lag bolts screwed into the sleeves. stand a post in each bracket and temporarily brace them with two pieces of 1-by-4 lumber.
since we want the pergola the same size as the existing patio, we start at the edges of the patio . open to sky and breeze to offer the best combined features of patio, porch and deck. drill patio for post brackets and attach with expansion anchors
once the location of the 6×6s posts has been determined, the 6×6 metal post anchors can be installed. the post anchors have a hole in the middle so that you can attach it to the deck joist. i drilled a hole using a 1/8 bit. then the anchor is secured to the existing joist with a 1/4 lag bolt.