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 98
ontact bridges havegiven evidence of elemental weakness in the tracksand threads which in two or three structures haveresulted in fracture, throwing grave doubt upon thesuitability of the rolling contact principle for suchusage. On the other hand, the trunnion has provenhere as it has during a… … TYPE OF STR \l>- At the present time Chicago faces the necessityfor further advance in bascule bridge design in con-nection with the proposed increase in the clear widthof channel in the main river. The existing basculesprovide a clear waterway of 140 feet between fen-der lines, cutting off…
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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