If bituminous coal is used then an average grate size is and is loaded with of coal.

The brasen altar, and his grate of brass, his staves, and all his vessels, the laver and his foot,

The altar of burnt offering, with his brasen grate, his staves, and all his vessels, the laver and his foot,

And he cast four rings for the four ends of the grate of brass, to be places for the staves.

A coal stove can burn either wood or coal, but a wood stove cannot burn coal unless a grate is supplied.

And he made for the altar a brasen grate of network under the compass thereof beneath unto the midst of it.

And thou shalt make for it a grate of network of brass and upon the net shalt thou make four brasen rings in the four corners thereof.

And therewith he made the sockets to the door of the tabernacle of the congregation, and the brasen altar, and the brasen grate for it, and all the vessels of the altar,