A. While there are a number of methods for attaching wood fencing and Ameristar iron fencing to a wall or concrete pad, solid wood posts are handled differently. Unlike decks where brackets are load-bearing and the tops of posts are secured to a structure, using brackets is not a correct practice for fencing because they will not support pressures from wind or ground cover. Installing wood fencing over a concrete pad or retaining wall requires cutting a hole through the concrete to secure them either in the concrete or the ground below depending on the depth of the concrete. The best practice, if it is possible, is to set wood posts to the outside of the concrete to allow them to be installed in the ground or use Post Master Steel Post and flange anchored in the concrete.  Your consultant will evaluate and recommend a specific installation method for your situation.