I'm planning to build a pergola on my existing deck and am looking for advice on how to securely fasten 4x4 posts to the deck. The deck is approximately 2 feet off the ground and is supported by concrete footings. I intend to place the 4x4s directly above these footings. I will be using brackets to hold the 4x4s in place, but I'm unsure about the best method to fasten these brackets to the deck and underlying joists.
Some of the options I'm considering include:
- Drilling fasteners directly into the deck joists from above.
- Using blocking between joists for additional support.
- Using long concrete fasteners to attach the brackets directly to the concrete footings below the deck.
- I live in the South, where high winds are a possibility.
- I haven't fully designed the pergola so can't provide exact details yet
- Given the exposure to high winds, I'll consider corner braces, maybe a railing for some additional support, etc.
- I've included below a picture of a concrete footer and the deck beams
- What is the most secure method for fastening the brackets to the deck and joists?
- Are there any specific types of fasteners or brackets that you would recommend for this project?
Related questions: there are a number of related questions that don't quite answer mine. This being Stack Exchange, always good to note, especially in case someone is looking through here someday in the future.
- Adding a pergola to existing deck, post anchors?: answer provides helpful considerations but doesn't specify how to attach the bracket to the deck beam or joist
- How can I extend my deck posts to support a pergola?: focuses on a case where there are already posts for a railing
- Adding a pergola to an existing deck?: suggests lag-bolting the posts to the adjacent joist -- this might work but I'm not sure how to do that here. Have never done much with decks.