. Railroad structures and estimates . con- l -III ? L «i ^ It =!X 1 \. Crete, 1 cement, torpedo sand and {\ to f in. limestone,with a surface dressing above ground of § in. of 1 : 1 : 1| mortarcomposed of cement torpedo sand and f:To the mortar is added o■. .,rnica for • 326 TRAIN SHEDS. the surface is quickly brushed with muriatic acid, then drenchedwith water and brushed over with a broom. Cost. — About two gallons of acid is used for each when finished 2000 lb. Cost of manufacture $16 to $19each. Fig. 152b is a reinforced concrete lamp-post. It is cast inthree distinct p
. Railroad structures and estimates . con- l -III ? L «i ^ It =!X 1 \. Crete, 1 cement, torpedo sand and {\ to f in. limestone,with a surface dressing above ground of § in. of 1 : 1 : 1| mortarcomposed of cement torpedo sand and f:To the mortar is added o■. .,rnica for • 326 TRAIN SHEDS. the surface is quickly brushed with muriatic acid, then drenchedwith water and brushed over with a broom. Cost. — About two gallons of acid is used for each when finished 2000 lb. Cost of manufacture $16 to $19each. Fig. 152b is a reinforced concrete lamp-post. It is cast inthree distinct parts, shaft, base and cap; when set up it is se-curely anchored to the concrete foundation by twisted steelreinforcing rods. Train Sheds. The advent of reinforced concrete or steel encased in con-crete has brought about an entire change in the design of trainsheds. In place of the high one span structure which wasalmost universal a few years ago the low short span type ofshed with posts is now most in evidence for new structures ofthis character. The low shed
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Keywords: ., bookcentury1900, bookdecade1910, bookidrailroadstructur00orrouof
