What are the hand signals for a crane?
Use Whip Line (Auxiliary Hoist): Tap elbows with one hand; then use regular signals. Raise Boom: Arm extended, fingers closed, thumb pointing upward. Lower Boom: Arm extended, fingers closed, thumb pointing downward. Swing: Point with a finger in direction of swing of a boom.
What type of signals should be used for crane safety?
Use regular signal to indicate desired action. Palm facing up, closed fist, thumb pointing in direction of desired motion, move hand back and forth horizontally to indicate direction of travel. Arm out, palm facing out and fingers pointing up, move in pushing motion until desired travel is complete.
Do overhead cranes need warning lights?
OSHA 29 CFR 1910.179 requires the use of warning lights for any cab-operated overhead crane.
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.
Does a floating crane need a gong?
Except for floor-operated cranes, a gong or other effective warning signal shall be provided for each crane equipped with a power traveling mechanism.
What are the three hand signals?
There are 3 basic driver hand signals:
- Slowing down or stopping – indicated by extending your arm downward with your palm facing backward.
- Left turn – indicated by an arm straight out through the window.
- Right turn – indicated by extending your arm at a 90° angle upwards.
What is a hammerhead crane?
Definition of hammerhead crane : a heavy-duty crane with a horizontal counterbalanced jib.
What is the minimum clearance between a crane and any power line rated at 50 kV or below?
10 feet
(i) For lines rated 50 kV. or below minimum clearance between the lines and any part of the crane or load shall be 10 feet; (ii) For lines rated over 50 kV., minimum clearance between the lines and any part of the crane or load shall be 10 feet plus 0.4 inch for each 1 kV.
What is the left hand signal?
Left Turn Hand Signal: How Do I Perform It? Before making a left turn or changing lanes from right to left, stick your left arm with fingers extended, straight out of your vehicle past your side mirror.
Which arm signal is given to turn left?
Left Turn Arm Signal The left turn hand signal is indicated by an arm straight out through the window with a spin. As you are making a move to your left side, vehicles that are already on your left side won’t be able to see the hand signals you make from your driver’s seat.
What is a luffing boom?
The Luffing Boom Crane was designed to meet the requirements of the restricted job site. With a short tail-swing and the ability to raise and lower its boom, it easily adapts to construction site demands providing complete coverage while avoiding obstructions.
What is minimum safe distance from overhead power line?
Hence, if one were to look at safe values – you need to be atleast 50 metres away from domestic transmission and 100 metres for 230-400KV transmission lines.
What is the safe distance from 400 kV line?
As per Indian Electricity Rule 1956, Clause No 77, the minimum distance between bottom conductor and ground of a 400KV transmission line is 8.84 meter.