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Figure 12-1.-Surveyor’s hand signals. | Up
Engineering Aid 3 - Beginning Structural engineering guide book | Next
Figure 12-3.-Hand signals for numerals. |
position in front of the body. Sometimes the range
pole tip is set on the ground to serve as a pivot.
Then the pole may be swayed slowly to the left
and/or right until the instrumentman picks up the
signal.
5. PLUMB THE ROD. The signal to plumb
the rod to the desired direction (right or left) is
given by extending the appropriate arm upward
and moving the hand in the direction the top of
the rod must be moved to make it vertical.
6. ESTABLISH A TURNING POINT. This
signal is given when the instrumentman wants a
turning point established during traversing or
leveling operations. It is given by extending either
arm upward and making a circular motion.
7. THIS IS A TURNING POINT. The
rodman gives this signal to indicate a turning
point. This is done using a leveling rod and
applying the method described in 4.
8. WAVE THE ROD. This signal, given by
the instrumentman to the rodman, is important
to get the lowest stadia reading. The instru-
mentman extends one arm upward, palm of the
hand forward, and waves the arm slowly from
side to side. The rodman then moves the top of
the leveling rod forward and backward slowly
about a foot each way from the vertical.
9. FACE THE ROD. To give this signal, the
instrumentman extends both arms upward to
indicate to the rodman that the leveling rod is
facing in the wrong direction.
10. REVERSE THE ROD. The instrument-
man gives this signal by holding one arm upward
and the other downward, and then reversing their
positions with full sidearm swings.
11. BOOST THE ROD. The instrumentman
gives this signal by swinging both arms forward
and upward, palms of the hands upward. This
signal is used when the instrumentman wants the
leveling rod raised and held with its bottom end
at a specified distance, usually about 3 ft, above
the ground.
12. MOVE FORWARD. The instrumentman
gives this signal by extending both arms out
horizontally from the shoulders, palms up, then
swinging the forearms upward.
13. MOVE BACK. The instrumentman gives
this signal by extending one arm out horizontally
from the shoulder, hand and forearm extended
vertically, and moving the hand and forearm
outward until the whole arm is extended
horizontally.
14. UP OR DOWN. The instrumentman gives
this signal by extending one arm out horizontally
from the shoulder and moving it upward or
downward. This directs the rodman to slide the
target up or down on the rod.
15. PICK UP THE INSTRUMENT. The
party chief gives this signal by imitating the
motions of picking up an instrument and putting
in on the shoulder. The party chief or other
responsible member of the party gives this signal,
directing the instrumentman to move forward to
the point that has just been established.
16. COME IN. The chief of party gives this
signal at the end of the day’s work and at other
times, as necessary.
Two additional hand signals are shown in
figure 12-2. Their meanings are given in the next
two paragraphs.
RAISE FOR RED. The instrumentman gives
this signal in a leveling operation to ascertain the
immediate whole-foot mark after reading the
tenths and hundredths of a foot. This usually
happens when the rodman is near the instrument
or if something is in the way and obscures the
whole-foot mark.
EXTEND THE ROD. The instrumentman
gives this signal when there is a need to extend
an adjustable rod. This happens when the height
of the instrument becomes greater than the
standard length of the unextended adjustable level
rod.
Figure 12-2.-Additional hand signals.
12-3
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