company news about firebrick is used to manufacture load-bearing walls

When firebrick is used to make load-bearing walls, the walls on the lower floors of a structure must support the weight of the upper floors; thus, the taller the structure, the thicker the walls must be on the lower floors. For example, Chicago’s Monadnock Building, which opened in 1896, is a firebrick structure of 17 stories, but the walls on the ground floor are almost 6 feet (1.8 meters) thick. It was this inefficient use of space that led to the use of iron, and later steel, for the framing of tall structures; when such structures have refractory fire brick exterior walls, they’re simply built up around an already-standing iron or steel frame, and are not load-bearing.