FIG. 235.—INTERIOR CONSTRUCTION MODERN STEEL BUILDING.
High Buildings.—A distinct feature of modern architecture is the enormously tall steel frame building known as the “sky scraper.” The increasing value of city lots first brought about the vertical extension of buildings to a greater number of stories, and the necessity for making them fireproof, coupled with the desire to avoid loss of interior space, due to thick walls at the base, made a demand for a different style of architecture. To meet this a skeleton frame of steel is bolted together in unitary structure, the floors being all carried on the steel frame, and the outer masonry walls being relatively thin, and carrying only their own weight. In [Fig. 235] is shown an example of the interior structure of such a building. The vertical columns are erected upon a very firm foundation, and to them are bolted, on the floor levels, horizontal I-beams and girders, stayed by tie rods, which I-beams receive between them hollow fireproof tile to form the floor. The outer masonry walls are built around the skeleton frame, as seen in [Fig. 236], and the details of connections for the floor members appear in [Fig. 237].
FIG. 236.—ENCLOSURE OF STEEL FRAME BY MASONRY.
FIG. 237.—DETAILS OF INTERNAL CONSTRUCTION.
FIG. 236.—ENCLOSURE OF STEEL FRAME BY MASONRY.