. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . Fig. 76. , n w v\ .:;-::-.:::51:::::i::^ 1 SILL 1 :-.::-:....::::!;:: Fig. 77. (c) Stone foundations,the most expensive. 77 illustrates the use of mud-sills asbuilt by the Louisville andNashville R. R. Eight blocks12X12X6 are used undereach bent. When the groundis very soft, two additionaltimbers (12 X12 X length ofbent-sill), as shown by thedotted lines, are placed under-neath. The number requiredevidently depends on the na-ture of the foundations are the best a

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. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . Fig. 76. , n w v\ .:;-::-.:::51:::::i::^ 1 SILL 1 :-.::-:....::::!;:: Fig. 77. (c) Stone foundations,the most expensive. 77 illustrates the use of mud-sills asbuilt by the Louisville andNashville R. R. Eight blocks12X12X6 are used undereach bent. When the groundis very soft, two additionaltimbers (12 X12 X length ofbent-sill), as shown by thedotted lines, are placed under-neath. The number requiredevidently depends on the na-ture of the foundations are the best and For very high trestles the Norfolk and 172 EAILEOAD CONSTRUCTION. §140. Western R. R. employs foundations as shown in Fig. 78, thewalls being 4 feet thick. When the height of the trestle is 72feet or less (the plans requiring for 72 in height a foundation-wall 39 6 long) the foundation is made continuous. The sill. SILL OF TRESTLg

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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1913