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    Similar terminology issue here in your 'Old Answer'. The J provides no sheer strength at all to this method (and it doesn't need to). It resists the bolt being pulled out of the concrete by tension - and even that is only to prevent the entire railing being lifted straight up. Preventing the railing from falling over when your pro football player leans against it is up to the bending strength of the bolt and the compression strength of the concrete it's embedded in (and has nothing to do with the J on the end). Commented Jul 18, 2022 at 15:27
  • @brhans Fair enough. I read the J has the most effectiveness against uplift such as for covered decks (wind lift) (is that called a pergola?) Commented Jul 18, 2022 at 16:01
  • @brhans: and don't forget, also the strength of the attachments holding the wood to the bracket. Commented Jul 20, 2022 at 4:53
  • Posts that support a deck can be railing posts, because they'll have multiple 3/4" bolts into an edge beam and the two outer posts also have bolts into rim joists, holding the whole thing square, with the other end +4' in concrete. That link, way above, isn't going to be any stiffer than a fence in my mind (which is what it's to; a fencing company). Commented Jul 20, 2022 at 6:43
  • If it's a railing then it definitely needs to not go anywhere. "cheap, easy, good. Which two would you like?" - "Good quality, then moderation / balancing of price and effort" - that's a pressure treated 4x4 in a 10" or larger sono tube, at 3' depth plus w/e your climate demands. 8" tubes at 16" ? Frowny face.... If there's a right angle kink to it, maybe that's fine. If not, that isn't. Commented Jul 20, 2022 at 6:44