Examples from the Web for firebrick
Slacked-lime putty may be used in place of hydrated lime; firebrick is best laid in fire-clay.Farmers' Bulletin 1889 - Fireplaces and Chimneys|Arthur H. Senner
There are no firebars at the bottom, so that the fuel rests on a floor of firebrick.
A single layer of firebrick completes the flooring of the interior area, which is also flush with the bottom of the flue openings.The New York Subway|Anonymous
The straw burners are provided with a firebrick arch in the firebox.Farm Engines and How to Run Them|James H. Stephenson
Adjoining is the laconicum with a firebrick furnace, after the nature of that of which I have before given full detailed drawings.The Turkish Bath|Robert Owen Allsop