. Electric railway journal . lidconcrete construction, including the paving, and employ-ing Dayton mechanical ties, Indianapolis apex elec-trically welded joints and 90-lb. T-rail of IllinoisSteel Company section 9020 rolled in 66-ft. reasons were involved in the selection of these paving desired by the city at practically no greater ex-pense than a good construction using wood ties andemploying a less permanent paving. Furthermore, theuse of these special ties provided a certain amount ofresiliency which was considered highly desirable whengoing to an otherwise rigid co
. Electric railway journal . lidconcrete construction, including the paving, and employ-ing Dayton mechanical ties, Indianapolis apex elec-trically welded joints and 90-lb. T-rail of IllinoisSteel Company section 9020 rolled in 66-ft. reasons were involved in the selection of these paving desired by the city at practically no greater ex-pense than a good construction using wood ties andemploying a less permanent paving. Furthermore, theuse of these special ties provided a certain amount ofresiliency which was considered highly desirable whengoing to an otherwise rigid construction, the reductionof noise being a factor in this case also. An accompanying drawing shows a cross-section ofthe track, from which it is seen that the concretefoundation was poured practically in the form of abeam under each rail. The surface of the trench wasprepared so that the thickness of concrete along underthe rails was about 7 in. under the ties and this wasnarrowed up to about 3 in. in the middle of the VARIOUS STAGES IN THE CONSTRUCTION OF TRACK IN GARY No. 1—Construction at the joints where special joint tie andelectrically-welded plate are used. Excavation under the ties atthe rails to form longitudinal beam can also be seen. No. 2—Pouring in the first layer of concrete. The sand soilis first packed down by wetting in advance of the concreting bymeans of a hose. No. 3—Rail and ties assembled and subgrade excavated readyfor pouring foundation concrete. No. 4—Pouring of the concrete base carried up even with thetops of the ties completed. No. 5—Appearance of the completed track showing expansionjoint locations in the distance. mechanical ties for use in this track. Because thelocal city authorities were making extensive use ofconcrete paving, it was highly desirable that the streetrailway should use the same type of pavement so thatthe street would be uniformly surfaced. The use ofmechanical ties with the concrete foundation and pav-ing constru
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