What is a grate?

A grate is a framework of metal bars or wires used as a cover over a hole or an opening in a fireplace, stove, or furnace to allow air or heat to pass through while preventing larger objects from falling in. Grates are commonly found in fireplaces to hold burning wood or coal and allow for proper air circulation. They can also be used in outdoor settings as drainage covers or for safety purposes in industrial settings. Grates are typically made of cast iron, steel, or stainless steel and come in various sizes and designs to suit different needs.