Quantcast SETTING  GRADE  STAKES

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Figure 14-33.—Cut stake. Figure 14-34.-Fillstake (not on centerline). Figure  14-33  shows  a  cut  stake  that  also happens  to  be  a  center-line  marker.  Note  that station mark is written on the front of the stake and the construction information on the back. On grade stakes other than the center-line stakes, the construction  information  should  be  written  on  the front  and  the  station  marked  on  the  back. The stake shown in figure 14-34 indicates that fill operations are to be performed. The letter  F at the top of the stake stands for fill. The numerals 24 indicate that 2 ft of fill are required to bring the  construction  up  to  grade. Some stakes indicate that no cutting or filling is  required.  Figure  14-35,  for  example,  shows  a grade stake that is on the proper grade and also is a center-line stake. The word  GRADE  (or GRD) is on the back of the stake, and the crowfoot mark may  not  be  indicated;  some  surveyors  prefer  to use a crowfoot mark on all grade stakes. If this Figure 14-35.-Stake on proper grade. grade stake is not a center-line stake, the GRD mark  will  be  written  on  the  front  of  the  stake. SETTING  GRADE  STAKES.—   GRADE STAKES are set at points having the same ground and grade elevation. They are usually set after the center line has been laid out and marked with hubs and guard stakes. They can be reestablished if the markers  are  disturbed.  Elevations  are  usually determined by an engineer’s level and level rod. One procedure you can use for setting grade stakes is  as  follows: 1.  From  BMs,  turn  levels  on  the  center-line hubs or on the ground next to a grade stake at each  station. 2.  Reduce  the  notes  to  obtain  hub-top  or ground  elevation. 3.  Obtain  the  finished  grade  elevation  for  each station  from  the  construction  plans. 4.  Compute  the  difference  between  finished grade   and   the   hub   or   ground   elevation   to determine  the  cut  or  fill  at  each  station. 5.  Go  back  down  the  line  and  mark  the  cut or  fill  on  each  grade  stake  or  guard  stake. The  elevations  and  the  cuts  or  fills  may  be recorded  in  the  level  notes,  or  they  may  be  set down on a construction sheet, as explained later in this chapter. Another  procedure  may  be  used  that  combines the method listed above so that the computations may be completed while at each station; then the cut or fill can be marked on the stake immediately. As before, levels are run from BMs; the pro- cedure  at  each  station  is  as  follows: 1.  Determine  the  ground  elevation  of  the station  from  the  level  notes  to  obtain  HI. 2.  Obtain  the  finished  grade  for  the  station from  the  plans. 14-36



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