Two-blocking occurs when the operator extends the boom on a crane without letting out sufficient slack in the cable. As a result, the stabilizing weight, called the headache ball, will be popped off by the extending boom.Sep 29, 2020
What does the term two-blocked mean?
Definition of two-block 1 : to haul upon (tackle) so that the two blocks are chockablock two-blocked the tackle and snapped the cable. 2 : to hoist (as a signal flag or anchor) to the full extent.
How does an anti 2 block work?
https://www.youtube.com/watch?v=Pdw4M-biXH0
What is the block on a crane?
A Load Block is the assembly of hook, swivel, bearing, sheaves, pins and frame and is suspended by hoisting ropes or load chains. It is used to lift and move objects up to a specific lifting capacity. Visit us at our Homepage for more crane terms.Jul 15, 2011
Why is it called two-blocking?
Of or pertaining to being prevented from proceeding. From nautical terminology for a ship's rigging or crane rigging in which two blocks are locked together, stopping the line.
What best describes the term two-blocking?
Definition of two-block 1 : to haul upon (tackle) so that the two blocks are chockablock two-blocked the tackle and snapped the cable. 2 : to hoist (as a signal flag or anchor) to the full extent.
What is the anti two block OSHA?
A positive acting anti-two-block device provides for an automatic cessation of the lifting action when the headache ball or block approached the end of the boom or jib. In responding to your second request, the standard does apply to all cranes, including friction rigs and hydraulic cranes.
What is crane 2 blocking?
Two-blocking occurs when the operator extends the boom on a crane without letting out sufficient slack in the cable. As a result, the stabilizing weight, called the headache ball, will be popped off by the extending boom. ... Many more modern cranes have anti two-blocking devices that prevent this accident.Sep 29, 2020
What is block in crane?
A Load Block is the assembly of hook, swivel, bearing, sheaves, pins and frame and is suspended by hoisting ropes or load chains. It is used to lift and move objects up to a specific lifting capacity. Visit us at our Homepage for more crane terms.Jul 15, 2011
What 2 block means?
Of or pertaining to being prevented from proceeding. From nautical terminology for a ship's rigging or crane rigging in which two blocks are locked together, stopping the line. We're not making progress because we're two-blocked by the crane that has the road shut down.