. The Architect & engineer of California and the Pacific Coast. ort span. The possibility of deep concrete girderson the sides supporting a concrete floor is apparent. Such a design woulddoubtless involve difficult problems, perhaps insurmountable, but the ideais at least within the realm of possibility. The town of Ross, in Marin county. State of California, recently haderected five small bridges, three of which are represented in figures 4, 5 and6. With the exception of the arch, all were designed as continuous girderswith a central span and overhanging counterweights. This method pro-duced
. The Architect & engineer of California and the Pacific Coast. ort span. The possibility of deep concrete girderson the sides supporting a concrete floor is apparent. Such a design woulddoubtless involve difficult problems, perhaps insurmountable, but the ideais at least within the realm of possibility. The town of Ross, in Marin county. State of California, recently haderected five small bridges, three of which are represented in figures 4, 5 and6. With the exception of the arch, all were designed as continuous girderswith a central span and overhanging counterweights. This method pro-duced comparatively light structures. The writer knows of no otherinstance wherein this method of design has been applied in bridgi -reinforced concrete. These structures have carried heavy road rollers with-out visible effect. The most ornamental of the Ross bridges is shown m figure 4. It isabout 80 feet Ion-, with a clear n >adway of 20 feet, and a ; fool i iverhanjsidewalk. The central span is 47 feet, carried by deep girders ha 44 The Architect and Engineer. The Architect and Ensinee gmeer 4;
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