Thompson Rivers University
Thompson Rivers University

Gantry Crane

Crane Safety Procedures Gantry Crane1

Pre-Shift Inspection
Overhead and gantry cranes must be inspected according to the procedure in ANSI/ASME B30.2, Overhead and Gantry Cranes.

Hooks must be inspected in accordance with the procedure in ANSI/ASME B30.10: Hooks approved for continued use shall be subjected to periodic inspection.

Hooks having any of the following deficiencies shall be removed from service unless a qualified person approves their continued use and initiates corrective action. Hooks approved for continued use shall be subject to periodic inspection.

Hook Inspection Checklist

Item Inspected Needs Attention or Repair OK
Cracks    
Wear exceeding 10% of the original section dimension    
Bend or twist exceeding 10 degrees from the plane of the unbent hook    
Hooks without latches, an increase in throat opening exceeding 15% (or as recommended by the manufacturer); Hooks with latches, an increase of the dimension between the fully opened latch and the tip section of the hook exceeding 8% (or as recommended by the manufacturer)    
Inoperative or faulty latches must be repaired or replaced before the hook is put back into service. Latches that fail to fully close the throat opening must be removed from service.    

Operation

  1. Crane controls should be moved slowly and gradually to avoid abrupt, jerky movements of the load.
  2. Slack must be removed from the sling and hoisting ropes before the load is lifted.
  3. Centre the crane over the load before starting the hoist to avoid swinging the load as the load is lifted.
  4. Crane hoisting ropes should be kept vertical. Cranes should not be used for side pulls.
  5. Never lower the block below the point where less than two full wraps of rope remain on the hoisting drum. Should all the rope be unwound from the drum, be sure it is rewound correctly and seated properly in the rope grooves, otherwise it will be damaged and the hoist limit switch will not operate to stop the hoist in the high position.
  6. Everyone in the immediate area should be clear of the load and aware that a load is being moved.
  7. Do not make lifts beyond the rated capacity of the crane, rope slings, slings, chains, etc.
  8. Do not operate the crane if limit switches are out of order or if ropes show signs of defect or wear.
  9. Make certain that before moving the load, load slings, load chains, or other load lifting devices are fully seated in the saddle of the hook.
  10. On all capacity or near capacity loads, the hoist brakes should be tested by returning the master switch or push button to the OFF position after raising the load a few inches off the floor. If the hoist brakes do not hold, the crane should not be operated.
  11. The load should be lifted high enough to clear all obstructions and personnel.
  12. A load should not be left suspended unless the operator is at the master switches or push button. Under these conditions, the load should be kept as close as possible to the floor to minimize the possibility to injury if the load should drop.
  13. When a hitcher is used, it is the joint responsibility of the crane operator and the hitcher to see that hitches are secure and that all loose material has been removed from the load before starting a lift.
  14. Loads with sling hooks hanging loose should not be lifted.
  15. All slings or cables should be removed from the crane hook when not in use. Dangling hooks or cable can snag other objects when the crane is moving.
  16. Crane operators should not limit switches to stop the hoist under normal operating conditions. These are emergency devices and should not be used as controls.
  17. Limit switches should not be blocked, adjusted, or disconnected in order to go higher than the switch will allow.
  18. Upper and lower limit switches should be tested at the beginning of each lift.
  19. No loads should be moved or suspended over people regardless of the attachment.
  20. If the power goes off, the controllers must be placed in the OFF position until the power is available again.
  21. Before closing main or emergency switches, ensure that all controllers are in the OFF position so that the crane will not start unexpectedly.
  22. In case of emergency, or during an inspection, repairing, cleaning or lubricating, a warning sign or signal should be displayed and the main switch should be locked in the off position.
  23. Do not change fuse sizes.
  24. Do not bypass any electrical limit switches or warning devices.
  25. Load limit or overload devices shall not be used to measure load being lifted. This is an emergency device and is not to be used as a production operating control.

Shutting Down or Leaving the Crane

  1. Raise all hooks to an intermediate position.
  2. Spot the crane at an approved designated location.
  3. Place all controls in the OFF position.
  4. Open the main switch to the OFF position.
  5. Make a visual check before leaving the crane.