i would attach the posts to the front of the retaining wall with concrete anchors. it will be your most stable option. then, you can sister another 4x4 to the back of those that sites on top of the retaining wall so your fence will be in line with the top of the wall. it will look awesome too. those post bases you posted are crappy.
attaching wood posts to concrete using a simpson strong tie e-z base 'fence post base' . how to attach wood posts / railing to concrete with simpson strong tie e-z base putting up a
4 rebar, 4'-9' long. tie to horizontal steel in wall. notes for all options: the options shown are illustrative of the recommended methods of attaching fence posts to concrete walls. all exposed metal is to be stainless, galvanized, or coated to prevent rust.
begin 1st course with a full length 4x4 post. the word course means one row or one layer of the materials of which the wall is made. drill two half inch holes through post centered 4 feet 1.2 m apart. hammer the post in place with rebar through the holes. hammer rebar until flush with top of 4x4 post.
in the back of the house where this deck is going, the basement on one side of the äúläù is a walk-out, while on the other side the basement wall is about 4äô under the ground.
don't attach the post to the wall. the brick wall is very strong in the vertical direction but is not meant to withstand horizontal force on a single brick. the post will flex slightly under the load you are planning. but even a slight horizontal movement will move or break the brick that it is attached to.
1. place the 2-by-4-inch cleat flat against the concrete block wall where you want to mount it. to help avoid breaking the concrete when you drill, center the cleat top to bottom along the row of
align the wooden post with the cement block. for gate or other fence post installations, use a carpenter's level to check that the post is level, or plumb, from top to bottom. for horizontal installations, place the level on top of the post and adjust as needed. check for and remove any obstructions that will keep the post from attaching flush to the wall.
hold the fence post in place on the wall. plumb the post with a level. make visible marks on the stucco wall where holes will be drilled for fastener placement.
screw the blocks to the bottom of the post then install. a word of warning: the mortar holding those blocks together isn't intended to resist lateral force. bump into that post at the top of the stairs too hard or too often and the block is coming off. you could also dig down next to the wall and set the posts like a fence.
how to attach a 4x4 to a concrete block wall i need to attached some pressure treated 4x4s to an existing block wall that is my current back fence. i want to top of the fence with something taller because its only about 5' tall right now and i am tired of looking at my neighbors while in my backyard.