. Railroad structures and estimates . l render the operation much safer thancribbing on \delding ground. When there is any doubt as tothe nature of the ground spread foundations should be pro\idedor piling when the former is not economical. Some roads pro-vide that the center pier shall be piled in all cases excepting inrock foundation. Pa\ing the pit floor helps to keep it clean, assists the drain-age, and snow can be removed with less trouble. Sometimessteam pipes encircle the floor of the pit to melt the snow inwinter time. This also enables the snow being dumped intothe pit from the engine
. Railroad structures and estimates . l render the operation much safer thancribbing on \delding ground. When there is any doubt as tothe nature of the ground spread foundations should be pro\idedor piling when the former is not economical. Some roads pro-vide that the center pier shall be piled in all cases excepting inrock foundation. Pa\ing the pit floor helps to keep it clean, assists the drain-age, and snow can be removed with less trouble. Sometimessteam pipes encircle the floor of the pit to melt the snow inwinter time. This also enables the snow being dumped intothe pit from the engine house approaches and helps in keepingthe engine tracks clean. At points where tables are not used to any extent the circlewall is only built at the entrance and runoff, using ballast underthe ties for the balance of the circular rail, sloping the groundwhere no retaining walls exist and grading the floor of the piton the natural ground, covered with a layer of cinders rolledand dished so as to drain readily. 100-FOOT TURNTABLES. 541. 4 H—jKOI-f—HA-^S-4ST|rj Si CI ;h I oo i=l -t-3Ul d dd 05 bb 542 100-FOOT TURNTABLES.
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Keywords: ., bookauthororrockjohnwilson1870, bookcentury1900, bookdecade1910
