I need to design this job. I need to built a 8 ft retaining wall with a patio on top of it. The house has a walkout basement. The wall is right next to the basement door. Then the patio on top. I need to come up with some type of railing or something for this situation. I thought about doing a double sided wall, but i do not feel safe enough with that. I think no matter what i do, i need to do it around the other 3 sides of the patio or it will look werid. I am thinking of doing masonry pillars with pvc deck railing running between the pillars. What do you guys think?