attaching deck posts to top of retaining wall - forum .
simpson manuf. makes a post base support for both 4x4 and 6x6posts. these consist of a base washer and finishing cap. place the base over the expansion bolt. add the washer. adjust the location of the post to center and add the post acording to directions and nail off with wood joist nails. you can wrap the base of the post to hide the metal base.