Canadian engineer . Fig. 4.—Foot Bridge, iVIadison, Wis. The railroad is carried over Main Street on a stone arch,artistically designed with towers at either end and stonebelt courses of different colors. The necessary head roomunderneath makes the use of an arch difficult in some cases,and when used, it must necessarily be a flat arch. Thebridge at Springfield is so low at the springs that there isa sense of insufficient head room when walking on the side-walk beneath the bridge. The extreme flatness of the archalso produces a feeling of insecurity and lack of strengthwhich injures it aesthet
Canadian engineer . Fig. 4.—Foot Bridge, iVIadison, Wis. The railroad is carried over Main Street on a stone arch,artistically designed with towers at either end and stonebelt courses of different colors. The necessary head roomunderneath makes the use of an arch difficult in some cases,and when used, it must necessarily be a flat arch. Thebridge at Springfield is so low at the springs that there isa sense of insufficient head room when walking on the side-walk beneath the bridge. The extreme flatness of the archalso produces a feeling of insecurity and lack of strengthwhich injures it aesthetically, for strength should, if pos-sible, be emphasized in all bridges. Apart from the flat-ness of the arch, the general effect is quite satisfactory. At Brockton, Mass., there are a number of ornamentaloverhead crossings, carrying lines of railroad over the. Fig. 5.—Park Bridge at Madison, streets. These are built somewhat similar to that at Spring-field, with stone arches, but at Brockton the long blank wingwalls are unsightly and more prominent than the bridgesthemselves. Garfield Boulevard, Chicago, is crossed by a set of rail-road tracks which are supported by through plate girderbridges, shown in Figure 3. As the boulevard is quitewide, the bridge has three spans, and an effort has beenmade to relieve the straight overhead lines by using flatarches beneath the girders. Other cities have treated the subject of grade crossingelimination in various ways, but generally either by trackelevation or depression, as any great change in street gradesis usually impracticable. A plan used by the writer for grade elimination is shownin Figures 4 and 5. This bridge is in the park at Madison,, and carries a foot walk over a double line of railway,which in this case is depressed instead of being elevated onnn embankment. Similar treatment
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
