Architectural engineering. With special reference to high building construction, including many examples of Chicago office buildings (1895)
Freitag, Joseph Kendall · New York, J. Wiley & sons; [etc., etc.] · leaf 74
Fig. 23. advantages of terra-cotta or tile—superior in fire-resistingqualities, as well as in greater lightness. Hollow tile is made from fire-clay, moulded by dies intothe various hollow forms required for commercial use.The clay is subjected during its manufacture to a highpressure while in a… … Fig. 24. The clay used in the manufacture of fire-proofing ma-terial must be of a refractory nature—as plastic fire-clay,semi-fire-clay, or fire-clay mixed with plastic clay or shale.But few clays have been found that are practicable of 56 ARCHITECTURAL ENGINEERING. manufacture into a floor of the…
Building, Iron and steel
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