What is grating definition?

A grating is a type of material made up of parallel, usually equally spaced, bars that are used to filter or diffuse light or air. Gratings can be found in many forms and are made out of various materials, including metal, plastic, wood, and fiberglass. They are commonly used in architecture, construction, and engineering applications for a variety of purposes including ventilation, drainage, filtering, and safety. Gratings can come in many different sizes and shapes, such as square, rectangular, round, or even custom designs, all depending on their intended use.