A deck needs guards if it is over 30" from grade anywhere within 36'. A deck 36" from grade with 14" high planter boxes going 36" out from the deck. Could this be interpreted as being higher than 30" from grade. My argument is what happens if the planter boxes are empty. A person falling off deck would get hurt worse than just falling 36" to the ground. People get creative when they don't want to put guards up to protect view. View over safety is not wise. Any Thoughts.