How do you signal a crane to stop?
The “stop” signal is associated with a single extended arm with the palm facing down. This arm will then be swung back and forth. The other arm will remain at the side of the signaller.
Where are crane operator hand signals found?
Crane operator hand signals Using standard hand signals is the most widely used manner of signaling a crane operator. A hand signal chart can usually be found on the side of the crane or it should be conspicuously posted in the vicinity of where hoisting operations are being conducted.
Which of the following hand signals the crane operator must obey no matter who gives it at a site?
The crane operator must obey a stop (or emergency stop) signal no matter who gives it. The operator also has the authority to stop operation whenever there is a concern as to safety.
What signal is used to indicate that you want the boom to be raised?
Raise boom – To raise the boom, a signal person will extend an arm horizontally to the side of their body and signal thumbs up, with a closed fist. Lower boom – In order to lower the boom the signal person will extend an arm horizontally and signal thumbs down, with a closed fist.
What are crane hand signals?
There are three common boom signals: Raise boom: Extend an arm outward and point the thumb upward with a closed fist. Lower boom: Extend an arm outward and point the thumb downward with a closed fist. Swing boom: Extend an arm outward, pointing with an index finger in the direction the boom should swing.
How many crane signals are there?
There are three different signals for stop, Emergency Stop, Stop, and Dog Everything. When any of these signals are used the operator will halt the crane.
What type of hand signals should be used for crane safety OSHA?
Both hands at waist level, closed fists, thumbs point outward. Arm out, closed fist, thumb pointing down, open and close fingers until load movement complete. Tap head with hand. Then use regular signal to indicate desired action.
What type of hand signal should be used for crane safety?
What is whip line for crane?
hoist. The secondary hoist is referred to as a “Whip Line”. See Rated Load Indicator. A device which aids the operator by automatically sensing the overturning moment on the crane, i.e. load X radius.
What type of hand signals should be used?
There are three main hand signals that every motorist and cyclist should become familiar with: Left turn, right turn, and slowing down/stopping. To indicate a left turn, extend your left arm out sideways with all your fingers extended.
What is headache ball in crane?
A headache ball is a weighted sphere attached to a lifting hook; the assembly is fastened to a wire rope for crane lifting operations (Figure 1). Figure 1. Headache balls, also known as overhaul hook balls, are used to keep tension on load lines — usually, single-part or “whip” lines.
What are the basic hand signals to use when working with crane operators?
Some of the basic hand signals to use when working with a crane operator include: LOWER THE CRANE’S LOAD: If the load needs to be lowered in place, point your forefinger downward with your arm extended toward the ground and move your hand in small circles.
When to stop crane movement due to communication issues?
If the operator has any concerns regarding the requested movement of the crane or needs to communicate with the signal person, the operator shall stop all crane movement. Crane movement shall not resume until the operator and the signal person agree on the issue at hand has been resolved.
Do you use hand signals during lifts?
Although it recommended to use hand signals during all lifts, it is in these situations when a signal person will definitely be called upon. Easy to understand, hand signals help the operator avoid any potential hazards, completing actions in a safe and timely manner.
How do you raise and lower a crane?
LOWER THE CRANE’S LOAD: If the load needs to be lowered in place, point your forefinger downward with your arm extended toward the ground and move your hand in small circles. RAISE THE BOOM: When the boom needs to be raised, extend your arm horizontally from your body and give the thumbs-up sign.