Hand signals in surveying pdf

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Hand signals in surveying pdf
Hand signals in surveying pdf

IMPORTANCE OF HAND SIGNALS IN SURVEYING

When levelling is done at construction site located in busy, noisy areas, it becomes difficult for the instrument man to give instructions to the man holding the staff at the other end, through vocal sounds. In that case, the following hand signals are found to be useful .

Also read - Method of Contouring in Surveying pdf with Characteristics of contour lines

IMPORTANCE OF HAND SIGNALS IN SURVEYING
IMPORTANCE OF HAND SIGNALS IN SURVEYING

 SignalMessage
aMovement of left arm over 90° Move to my left
bMovement of right arm over 90°Move to my right
cMovement of left arm over 30°Move top of the staff to my left 
dMovement of right arm over 30°Move top of staff to my right
eExtension of arm horizontally and moving hand upwardsRaise height peg or staff
fExtension of arm horizontally and moving hand downwardsRaise height peg or staff
gExtension of both arms and slightly thrusting downwardsEstablish the position 
hExtension of arms and placement of hand on top of head.Return to me

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