Pylon signs are a type of signage that utilizes a hollow plastic board (usually called a lightbox cabinet) or a metal board mounted on a steel frame that's surrounded by one or two metal posts. Pylon signs are usually installed on roads to indicate that a particular business is nearby or to indicate an important landmark.
Regardless of how they're constructed, pylon signs have the following parts:
Lightbox Cabinet - The lightbox cabinet is the part that houses all of the graphic elements that allow the pylon sign to convert information. This part is hollow on the inside. It's designed this way so that it can house light bulbs or LEDs. Acrylic plastic or polycarbonate plastic is the source material for making the lightbox cabinet.
Metal Board - If not a lightbox cabinet, then a pylon sign might utilize a metal board to display information. This metal board is commonly made out of aluminum. Graphical elements are embedded or carved on it. Sometimes, a manufacturer might place pieces of 3D graphics using metal adhesive too.
Metal Frame - The metal frame holds the metal board or lightbox cabinet in place. It's welded on the post and doesn't come off easily even when the pylon sign is hit through collision or any other devastating incidents. On a further note, the metal frame's size is slightly bigger than the size of the metal board or lightbox cabinet for easy installation and maintenance.
Post/Posts - This acts as the foundation of the pylon sign and allows it to stand on the side of the road. Depending on the pylon sign's size and design, there might be one or two posts. High pylon signs use a single wide-beamed post. On the other hand, pylon signs that are slightly taller than the average human use two narrow-beamed posts.