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7
.
The primary use of hand signals is for a signalman to direct the lifting, handling, and
placement of loads attached to working equipment. Hand signal usage may also be
applicable to earthmoving operations and/or machine travel when the operator's visibility
is obstructed.
If a rapid lifting, lowering or moving movement is required, the dipper arm movements
should be carried out more lively. If two different machines are used for lifting the same
load, there should be an agreement beforehand how the lift should be carried out and
what signals should be given to the respective operators.
R
A
I
S
E
L
O
A
D
V
E
R
T
I
C
A
L
L
Y
With either forearm vertical,
forefinger pointing up, move
hand in small horizontal
circles.
L
O
W
E
R
L
O
A
D
V
E
R
T
I
C
A
L
L
Y
With either arm extended
downward, forefinger
pointing down, move hand in
small horizontal circles.
M
O
V
E
L
O
A
D
I
N
H
O
R
I
Z
O
N
T
A
L
L
Y
With either arm extended,
hand raised and open
toward direction of
movement, move hand in
direction of required
movement.
M
O
V
E
L
O
A
D
O
U
T
H
O
R
I
Z
O
N
T
A
L
L
Y
With either arm extended,
hand raised and open
toward direction of
movement, move hand in
direction of required
movement.
R
A
I
S
E
B
O
O
M
With either arm extended
horizontally, fingers closed,
point thumb upward.
L
O
W
E
R
B
O
O
M
With either arm extended
horizontally, fingers closed,
point thumb downward.
O
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