. The street railway review . hen formed of broken stonewhich in this case was obtained by breaking up the old concretewhich had been used in the previous track work, the men breakingthis up with sledges just as it lay and throwing it in behind themas they progressed. Sawed ties, 6 by 8 in. by 7 ft. were next placed Apr. 20, 1903] STREET RAILWAY REVIEW. 203 on the sub-base of broken stone and spaced 6 ft. between the ties were spiked the (j-in. grooved rails and the whole trackbrought to surface and alignment. It was usual at this stage andbefore the concrete cement was poured in to
. The street railway review . hen formed of broken stonewhich in this case was obtained by breaking up the old concretewhich had been used in the previous track work, the men breakingthis up with sledges just as it lay and throwing it in behind themas they progressed. Sawed ties, 6 by 8 in. by 7 ft. were next placed Apr. 20, 1903] STREET RAILWAY REVIEW. 203 on the sub-base of broken stone and spaced 6 ft. between the ties were spiked the (j-in. grooved rails and the whole trackbrought to surface and alignment. It was usual at this stage andbefore the concrete cement was poured in to let cars pass over thetrack for a day in order to secure good settlement of ties and insure tlie sub-grade under each track, the bottom of the ditch was givena cross slope of I in. to the foot, the slope in each case being towardthe center line between the two tracks. Along this center line waslaid a line of 4-in. tile drain pipe, laid with open joints and con-nected at frequent intervals to the street sewers. In addition to. HARTFORD STANDARD Weikht lb. per sq. yd. Laid on Main St. in 1XI2. Smaller section show s the old rail reniovetl. belter surface and line. When the track had liecn brought to perfectposition the side forms for the concrete beams were placed and theconcrete cement shoveled into place. Tht concrete cement is a I: 3: 6 mixture of clean sand and bestPortland cement. For convenience, the woo<len forms were builtin 6-ft. sections of i^^-in. stuflf, 18 in. deep. Each section wasnotched at both ends to permit the forms to set down over the preparing the work for the concrete cement, the forms wereset up along each rail and held in place by tie rods as shown inthe reproductions from photographs. After the concrete beams hadl)een formed they were allowed to set for from 36 to 60 hours.
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
