What is safe to "raise a crane" by using hand signals correctly?
Emergency stop lifting
Extend both arms out to shoulder level, split hands facing down, and swing back and forth in a horizontal line quickly.
Stop lifting
Extend your left arm out to shoulder level, palm facing down, and swing it quickly back and forth at shoulder level.
Stop and secure all wire ropes.
Both fists come together to be at waist level.
Lift things up slowly.
Raise your arms upside down, palms up to chin level. Then use the index finger of the other hand to point the middle of the palm and turn it slowly.
Boom lift
Extend your right arm out to the end. Then clenched his fist up.
Sleep boom
Extend your right arm out to the end. Then he clenched his fist and raised his thumb.
Use big pulley
hand raised above head and gently tapped on his head several times. And use other signals as needed
use a small pulley
Bend your elbows up, hands at shoulder level, sway slightly forward. Then use the other hand to touch the elbow, then give the other desired signal.
Swing the boom to the side where the hand is pointing.
Extend your left or right arm in the direction you want to turn the boom.
Walk on
Extend your right palm straight forward at shoulder level. With your palms upright, make a push in the direction you want the crane to move.
Lock the track on one side.
Lock one track By raising your right hand, your elbow is bent at 90 degrees, allowing the opposite track to move as needed. With the other hand at waist level and then rotate towards the vertical (applies only to crawler cranes)
Let the crawler go forward or backward.
Two spoonfuls together always lifted the abdomen Then turn the two clenched hands to make a rhythm. If you want to move forward, turn your hand forward. If you want to go backwards, turn your hand backwards.
Move the pulley up
to bend elbows up to a perpendicular pointing finger up and turn in a circle
scroll down
spread your arms slightly pointing finger down and turn in a circle
Raise the boom while moving the pulley down.
Stretch out your arms palm stretched in an upright position thumbs up and sweeping all four fingers back and forth (except the thumb)
Lie booms up while moving the pulley up.
Stretch out your arms palm stretched in an upright position thumb pointing down and sweeping all four fingers back and forth (except the thumb)