The book Highway Engineering, Rural Roads And Pavements was written by author George Richard Chatburn Here you can read free online of Highway Engineering, Rural Roads And Pavements book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Highway Engineering, Rural Roads And Pavements a good or bad book?
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With the center height known the side stakes may be obtained by using a spirit level on the top of the board. If side grade stakes are set, the cen- ter and "intermediate stakes- can be quickly set, by sight rods, are shown in Fig. 40. Rods are placed upright behind the stakes at M and N with the blocks D resting on their top. The " T '' is of con- stant height and the stake upon which it is held is driven until the line of sight from A io A' coincides with its top. Several notches are cut in t...he rods A, B, and C to facilitate setting intermediate stakes. The top is used for center stake, notches A for one-fourth distance-out; B, for one-half; and C for three- fourths. It is easier to sight these rods if the farthest one is painted white and the middle one a different color. Side Ditches. — The water having been shed from the road surface by the crown must be further taken care of. For this purpose side-ditches parallel to the center line of the roadway are constructed. These must have sufficient longitudinal grade to allow the water to flow along them until a place is reached where the natural formation of the land will allow it to flow away from the right of way.
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