. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . The width of roadbed between theshoulders, recommended for Class B is 16 feet. As before,the width of the ditches is supposed to be added to this should be noted that when using cementing gravel and chertthe slope of 3:1 is made to begin at the bottom of the tie in-stead of at a point about 2 inches below the top of the is done in order to prevent water from accumulatingaround the end of the tie in a material which is less permeablethan the other forms of balla
. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . The width of roadbed between theshoulders, recommended for Class B is 16 feet. As before,the width of the ditches is supposed to be added to this should be noted that when using cementing gravel and chertthe slope of 3:1 is made to begin at the bottom of the tie in-stead of at a point about 2 inches below the top of the is done in order to prevent water from accumulatingaround the end of the tie in a material which is less permeablethan the other forms of ballast. In Fig. 108 are shown two cross-sections for ballast for roadsbelonging to Class ^C. On roads of this class it is assumedthat crushed rock will not be used for ballast. The width of 234 RAILROAD CONSTRUCTION. §198. roadbed between shoulders is 14 feet, while the depth of ballastunderneath the tie is 6 inches. It should be noticed that the above sections issued by theassociation do not include any cross-section which is recom-mended when no special ballast is used other than the natural Slope j/to the foot. Crushed rock and slag
Size: 3165px × 790px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1913
