Add 6 inches of bleed to the height and width (each individual side would get +3 inches bleed)
A guideline line is required at the top of the live area, running the width of the banner. This represents the portion that will be first tucked into the frame. It also helps the install to be level. For most backgrounds, use a white line. For white backgrounds, use an opposing colored line. For line thickness, use .05pt (when designing at 10% scale)
Place a vertical guideline line in the bleed area at the midpoint of the graphic