A half century of Chicago building : a practical reference guide : all building laws and ordinances brought to date : historical, technical and statistical review of the construction and material development of America's inland metropolis (1910)
Jones, John H., Ald, Britten, Fred A · Chicago : [s.n.] · leaf 217
pace obtained by omitting one jack arch. Over thislayer of concrete are two courses of brick placed in anasphalt compound while it was still hot, which serves asthe water-proofing of the roof. As a covering for this isa layer of concrete twelve inches thick, reinforced by asystem of wires. The… … into the tunnel to the place of erection on flat cars runon the street car tracks, from which they were jacked upand placed in proper position. The accompanying photo-graph shows the roof girders in place before the con-creting. The invert of the tunnel was lowered eight feet inthe section under…
Construction industry -- Illinois Chicago History 19th century · Construction industry -- Illinois Chicago History 20th century · Building laws -- Illinois Chicago · Chicago (Ill.) -- Buildings, structures, etc
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![An illustration from XIXe [i.e. Dix-neuvième] siècle (en France); classes - moeurs - usages - costumes - inventions. Ouvrage illustré d'un front. chromotypographique, de 16 planches coloriées aux patrons, de 36 entetes et lettres ornées et de 487 gravures (dont 24 tirées hors texte) d'après les principaux artistes du siècle (1893)](https://img.insideoutlibrary.com/img/200/ia-xixeiedixneuvi00granuoft-802-610.webp)
