Grate

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grate

[grāt]
(engineering)
A support for burning solid fuels; usually made of closely spaced bars to hold the burning fuel, while allowing combustion air to rise up to the fuel from beneath, and ashes to fall away from the burning fuel.

Grate

A frame that consists of parallel metal bars, attached by cross bars at regular intervals; used as a grille or security device.

grate

A surface with suitable openings to support a fuel bed, such as coal, and permit passage of air through the burning fuel. Designed to permit removal of unburned residue, and may be horizontal or inclined, stationary or movable.