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 183
T irons are supported on I-beam purlins, and if this type isemployed care must be taken to see that such a form ofbook-tile is used as will effectually protect the under sur-faces of the T irons. A common method has been to placethe book-tile on the flanges of the T irons, thus leaving thelower… … Fig. 105, Tile arches of the segmental pattern are often used inroof construction, and the whole is then covered with alayer of concrete which receives the composition roofing(see Fig. 57). The supporting girders and purlins shouldalso be covered, either with special forms of tile blocks orslabs,…
Building, Iron and steel
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