Kick Plates (aka Toe Plates or Toeboards) are required by OSHA and are used to prevent materials from sliding off, or being kicked off a roof and hitting the surface, or people, below.  Kick Plates can be used with most Rooftop Railing products. Appropriate Type 69 Fittings are available.
NextGen Custom Railing Kick Plate
NextGen Custom Railing™ Kick Plate