. The street railway review . 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
. The street railway review . 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 LIllHT CONCRETE CONSTRUCTION. this provision for sub-surface drainage, the two inner rails werefrcquemly set somewhat higher than the two outer rails, thus pre-serving the crown lino of tlie street and thereby giving better surfacedrainage. As is well known, one objection to the use of the grooved rail isfound in the fact that the groove in rainy or slushy weather fillswith water and becomes a runway for a large amount of the sur-face drainage, the water being thrown up by the wheels, causing con-siderable damage to armatures and fields. To prevent this in theHartford construction, catch boxes locally called scuppers, wereplaced in the rails at intervals varying from 300 to 500 ft. At low gmp WKk I^h^^^^^^^^^Hk^^ > ^ % ^SBHF • ^ SCUPPERS IN PLACE. points in grade, two sets of these bo.\es were used in each rail about5 fl. apart, as shown, in one of the half-tones. Ihis scupper is a casting set on the inside of the rail and havingopenings into the groove of the rail. The bo.\cs we
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
