No element of an outdoor café can be permanently affixed to the sidewalk, including canopies or awnings, fences, tables and chairs, or heating or cooling elements; however, low fences or low barriers (less than three feet tall) that are within and along the café area can be affixed to the ground, using a sleeve system, as long as they are removable and upon removal the area where the fence or barrier is affixed can be capped or filled so the surface is even with the sidewalk.