. Electric railway review . an economical methodwhen building suburban tracks, and the tracks are tamped onsub-grade before running the l)allast trains over it. This willprevent springing of rails. This method is tilso used on roads 696 ELECTRIC RAILWAY REVIEW October 16, 1906. whicli are built to sell without Iiaving to operate them. Wehave a large amount of track which was built when horse-carswere used, or light motors. But with the heavy cars, which mustsooner or later run over your tracks, a good foundation mustbe provided. Tamping bars are used on gravel and sand, and tamping on tlie bed
. Electric railway review . an economical methodwhen building suburban tracks, and the tracks are tamped onsub-grade before running the l)allast trains over it. This willprevent springing of rails. This method is tilso used on roads 696 ELECTRIC RAILWAY REVIEW October 16, 1906. whicli are built to sell without Iiaving to operate them. Wehave a large amount of track which was built when horse-carswere used, or light motors. But with the heavy cars, which mustsooner or later run over your tracks, a good foundation mustbe provided. Tamping bars are used on gravel and sand, and tamping on tlie bed before laying the ties. Then cover this with i inchof sand and tamp the ties with the sand. The space between theties was then filled with concrete and sand laid on top of thisfor the paving bed. This method worked very well and gavegood results, but I do not consider it as satisfactory as the con-crete under and between the ties after the rail is laid. The con-crete, when laid first, must not be used until thoroughly Ballast—Figure 2—Track Laid with No Ballast but CommonSoil. picks on broken stone. Tamping bars are also used on concreteunder the ties and under the rail. On a number of our streets the soil is sandy and the trackshave been down about twelve years. The rail is the Lorain SteelCompanys 90-pound, No. 206, laid on chestnut ties and the jointsare cast-welded. The ties were tamped with the material takenout. This track has been a constant expense for the last fouryears, lowering high paving stones caused by tlie working nf ibr Ballast—Figure 4—Track With Six-Inch Rail on Concrete andwith Chairs. Of course the rigidity of the track when using concrete is greaterthan when using a sand construction. A standard construction in Syracuse, N. Y., in 1895, was touse coarse gravel for the foundation. This was laid for a depthof 6 inches and thoroughly rolled. The track was then laidand tamped with fine gravel and this thoroughly rammed betweenthe ties to prevent
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