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Construction Sheets Several construction situations have been men-tioned in which line and grade for construction are obtained from a line (or perhaps from two lines) of
Figure 10-22.Combination power and communication manhole. offset hubs. A guard stake adjacent to one of these hubs usually gives the station and elevation of the hub, grade for the structure at this station, and the vertical distance between the top of the hub and grade, marked C or F. This information is often recorded on a construction sheet (familiarly known as a cut sheet) like the one shown in figure 10-24. One advantage of the use of cut sheets that the information applying to every hub is preserved in the event that guard stakes are accidentally
Figure 10-23.Handhole.
Figure 10-24.Typical construction sheet.
Figure 10-25.Runway approach zone displaced. Another advantage is that reproductions of the cut sheet can be given to construction supervisors so that they may always have access to all the essential construction data. |
 
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