Final answer:
The reference information provided does not specify a particular floor system. It outlines a variety of historical construction methods, including the Chicago School's steel-frame construction with masonry cladding and Frank Lloyd Wright's prefabricated concrete block system.
Step-by-step explanation:
The commonly used floor system in high-rise and mid-rise masonry bearing wall buildings in North America is not explicitly mentioned in the provided reference information.
However, the Chicago School introduced steel-frame construction with masonry cladding, typically terra cotta, which became prominent in high-rise architecture.
Moreover, historical constructions have used a variety of methods, such as the post and lintel system, pier-and-beam construction, and prefabricated concrete block systems designed by Frank Lloyd Wright for his Usonian houses.
The latter included features like flat roofs, a radiant heating system, and open floor plans, which have influenced modern building practices.
The prevalent floor system in North American high-rise and mid-rise masonry bearing wall buildings is not explicitly detailed in the reference. However, the Chicago School introduced steel-frame construction with terra cotta cladding.
Historical constructions utilized diverse methods, including Frank Lloyd Wright's prefabricated concrete block systems, influencing contemporary practices with features like flat roofs and open floor plans.