What hand signals should be used for crane safety?
OSHA enforces standards and training requirements for safe working environments across multiple industries, including construction in the United States. Stop signals are one the most important hand signals used on a construction site. When stop signals are used operation of the equipment must be halted.
Who is responsible for the crane and its operation?
The lift director is described by ASME as the party that directly oversees the work being performed by the crane and the associated rigging crew. According to ASME B30. 5, a lift director must be onsite for all lifting operations.
What action does a signal person intend the operator to perform if he extends his arm at shoulder height makes a fist with his hand and sticks his her thumb up?
What action does a signal person intend the operator to perform if he extends his arm at shoulder height, makes a fist with his hand, and sticks his thumb up? Boom up.
Who must approve multiple crane functions when using voice signals?
(a) – Prior to beginning operations, the operator, signal person and lift director (if there is one), must contact each other and agree on the voice signals that will be used.
How should you signal the crane operator to move slowly?
Move Slowly: Use one hand to give any motion signal and place the other hand motionless in front of the hand giving the motion signal.
What types of power does a Category 1 or 4 Crane generally use and what is its source?
Category 1 and 4 Crane Power Types Category 1 and 4 cranes generally use electric or hydraulic power that is supplied by a diesel engine. A collector ring system conveys electrical current from the revolving portion of the crane to the lower crane structure.
What are the three functions of a crane?
The main purpose of a crane is to lift extremely heavy amounts of weight. A typical crane is equipped with a hoist rope, wire ropes or chains and sheaves.
Modern day cranes are used for:
- Construction Materials.
- Railroad Tracks.
- Shipping Materials/Equipment.
- Scrap Metal.
- Mobile Homes.
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What is the main advantage of using cranes?
One of biggest benefits mobile cranes have to offer is their level of flexibility and movability, especially in situations where multiple obstructions are present. Mobile cranes can be used to access narrow passages and sites that have limited space, making them a practical solution for many jobsites.
How long does it take to become a crane operator?
Becoming a crane operator can take anywhere from a couple of months to a couple of years depending on the training program and the type of crane you wish to operate. Most certification training courses last from 4-8 weeks.
What must you know when using a load chart?
The load charts are specific to the make, model and configuration of a specific piece of equipment. Don’t forget to include adjustments for buckets, boom extensions, load blocks, hoisting rope and other attachments that will alter the lifting capacity of the crane or equipment used to perform the lift.
How do crane operators communicate?
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.
What marking must be clearly visible on a crane?
OSHA standard 1910.179(b)(5) states that “The rated load of the crane shall be plainly marked on each side of the crane, and if the crane has more than one hoisting unit, each hoist shall have its rated load marked on it or its load block and this marking shall be clearly legible from the ground or floor.”
When should the radios be used to signal a crane to be tested?
7. Describe the signalperson’s actions when the operator is not following signals correctly. Signals shall be discussed and agreed upon by the crane operator and the signalperson. Telephones, radios, or equivalent shall be tested before lifting.
Which of the following is the most dangerous factor among crane accidents?
Contact with overhead power lines – Electrocution from contact with overhead power lines is a leading cause of crane related accidents. Both the crane operator and workers in the crane basket should be aware of the placement of power lines surrounding the worksite.
Is the point in the object around which its weight is evenly distributed?
Center of Gravity The center of gravity of any object is the point in the object where its weight can be assumed to be concentrated or, stated in another way, it is the point in the object around which its weight is evenly distributed.