Crane Operation - Saif · 2020-05-20 · Safety Challenges Crane Operation Have all signals reviewed by the crane operator and signal person prior to the job start. The use of cranes

Safety Challenges Crane Operation www.saif.com

© SAIF Corporation, Risk Management — Safety Challenges SC-111, September. 2007

Crane Operation

Safety Challenge

Cranes Because cranes of various descriptions are the most widely used and misused pieces of equipment in the construction industry, safe operation of this machinery is of the utmost importance. Over 95 percent of all crane accidents are caused by human error. Such errors can be avoided through advanced planning and preparation. Cranes are built for safe and economical operation, but are only as safe as the operator.

SC-111 September 2007


Because cranes of various descriptions are the most widely used and misused pieces of equipment in the construction industry, safe operation of this machinery is of the utmost importance. Over 95 percent of all crane accidents are caused by human error. Such errors can be avoided through advanced planning and preparation. Cranes are built for safe and economical operation, but are only as safe as the operator.

Safe crane procedures

Ensure crane certifications are current.

Keep crane, boom, lines, and loads at least 10 feet away from electrical power lines.

Do not exceed the manufacturer’s rated capacity listed on the load chart inside the crane cab.

Check to see that the crane is set up on solid footings and outriggers are fully extended. Tires must be off the ground when making picks.

Barricade around counterweight swing area.

Avoid swinging loads over heads of workers. Use tab lines.

Use safety latches on all crane hoods.

Do not ride the crane’s hook or load.

Require that crane signals be given by only one person.



Have all signals reviewed by the crane operator and signal person prior to the job start.

The use of cranes and other lifting equipment poses special safety hazards. Competent and careful operation by trained employees is essential. Smaller equipment, such as boom trucks, is especially dangerous because operation appears to be simple.

Only the following personnel should operate this type of equipment, and the names of each should be posted in the cab of the crane or in some other visible location.

Designated Operator: Trained, qualified person assigned to the equipment. Must be trained in manufacturer and regulatory procedures that apply to the equipment.

Trainees: Under the direct supervision of the designated operator.

Maintenance and Test Personnel: Trained and qualified to operate and

maintain the equipment and can perform these functions as needed.

Inspection and Maintenance



General: It is recommended that a periodic inspection, lubrication, and maintenance schedule be established for cranes and hoists, and that this schedule be carefully followed. Such a procedure will prevent minor defects from becoming progressively more dangerous, as well as more costly to repair.

Daily: This inspection is to determine that the crane or hoist is safe for immediate use. The inspection should be made at the beginning of each shift, and should include, but not necessarily be limited to the following:

a) Be sure the crane or hoist is properly lubricated.

b) Inspect all brakes for proper adjustment (See Safety Recommendation No.4).

c) Operate each control to determine that it functions properly. Report any defect found to properly authorized supervision and notify the next operator of the defects at the change of shift.

d) Visually inspect each component of the crane or hoist normally used in the lifting load, traveling, or lowering the load. This inspection should include, but again not be limited to, such items as the following:

1) Wire rope. Inspect for kinks or broken wire and replace seriously damaged rope immediately.

2) All functional operating mechanisms such as sheaves, drums, and brakes, and all safety devices (e.g., upper and lower limit switches).

Safety Recommendations

The following safety recommendations represent the accumulated experience of Milwaukee Crane and Equipment in regard to the most likely causes of personal injury and damage to equipment. Careful compliance with the following recommendations will prevent the majority of accidents.

1. Before leaving the control station of the crane, the following cautions must be observed.

a) Lower the load to the ground.

b) Raise all hooks to the upper limit switch.

c) Place all controls in the OFF position.



d) Place the main power switch in the OFF position.

e) Make a visual check for any abnormal or dangerous conditions.

NOTE: NEVER depend on a holding brake to suspend a load unless the operator is at the controls, alert and in a position of readiness to handle the load.

2. An operator must not eat, read, sleep or otherwise divert his attention while operating a crane. Practical jokes should be absolutely forbidden, and the use of alcohol or other intoxicants is not to be tolerated. An operator who is given a prescription drug by a physician should obtain written assurance before returning to work that it will not prevent safe operation of the crane or hoist.

3. The operator or person in charge should see that:

a) Loads are well secured before being lifted and slings are adequate and properly arranged for the load.

b) Slings are not kinked and load is well secured and balanced.

c) All loose items such as tools or chips are removed from both the load and crane or hoist before beginning the lift.

d) The load does not contact any obstruction while lifting or traveling.

e) Sudden starts and stops are avoided. Bumping into runway stops is prohibited.

f) The hoist line is vertical before starting the lift, slack in the line is removed slowly, and that all workers’ are clear before beginning the lift.

g) No crane load, lifting magnet, grapple, or bucket ever passes over the heads of workers or in any way endangers their safety. Non-operating personnel should be warned, or told to leave the immediate area when making lifts.

h) No one rides the hook or bucket. The crane is not intended to be used as a passenger elevator.

i) ALL stop signals are obeyed, regardless of who gives them.

4. The operator should test the holding brake by moving the controller to the OFF position when a load is first lifted, and then when the load is only a few inches above the starting position, to ensure the ability of the brakes to hold the load. If the load is held, the brake is operating properly. If the brake does not function properly, maintain control of the load using the hoist motor and lower it slowly to rest. Report the condition to the appropriate supervisor immediately and do not make any other lifts until the condition has been corrected.



5. Never attempt to adjust, repair or lubricate moving machinery.

6. Keep the machine clean and in good working order.

7. Lower the load to the ground before attempting any repairs or adjustments.

8. Always replace all protective guards and panels before operating the crane or hoist.

9. Keep cables in good operating condition, paying particular attention to the following:

a) A kinked cable is no longer safe. When a new cable has been installed, work light loads for a short period of time to allow the cable to adjust itself to work strains.

b) Be very careful to install cable clamps correctly.

c) Inspect all cables for kinked or broken wires on a daily basis.

10. Never exceed the rated capacity of the crane or hoist. Be sure to include the weight of blocks, hooks and special handling devices when figuring the total weight of the load, and KNOW you are not exceeding capacity when preparing to lift load.

11. Never use a crane for side pulling. It was not designed nor intended for such use. This practice may cause electrical as well as mechanical damage and will endanger personnel.

12. If a rope has been allowed to become slack, make sure that the rope is properly seated on the drum and in the sheaves before the load is lifted.

13. Never lower the block to a point where less than two full wraps remain on the drum. If all cable is removed from the drum, be sure it is rewound in the correct direction to prevent cable damage or to insure correct operation of the hoist limit switches.

14. Never block out safety devices, such as limit switches, in order to allow operation of the crane in a manner not intended by the manufacturer.

15. Do not lift loads with excess sling hooks hanging loose. This is a very dangerous condition. Never allow any excess chain, hook, cable, sling or any similar device to be suspended beneath the crane.

16. If electrical power fails, place all controllers in the OFF position, and keep them there until power is restored. This will prevent sudden and unexpected movement when power is restored.

17. Never remove a DO NOT OPERATE card from a control without checking to see if it is safe to do so, even if you have placed the card yourself. Someone else may be depending on that card to prevent the crane from being operated.



18. Use fuses of specified size. Blown fuses are both a sign of trouble and the main protection afforded the electrical system.

19. Never contact another crane on the same runway if it is possible to avoid doing so. When this must be done, check first to see that all concerned are aware that it will be done and that they are properly warned. Then contact the crane to be pushed at the slowest possible speed and push it at a very slow speed. Never move or bump a crane or hoist that has a warning sign displayed.

20. While inspecting, repairing, cleaning, lubricating, or maintaining a crane or hoist a warning flag should be placed where it is readily visible to indicate that the crane or hoist must not be moved. The main power switch must be locked in the OFF position. When someone other than the operator is doing the work, the operator must remain at the controls, alert for possible danger to the workmen, unless specifically informed to the contrary by his supervisor.

21. Whenever the crane is being serviced, repaired, lubricated, or otherwise maintained it must be moved to a position over an area where no one will be endangered by falling material. If this is not possible, the area beneath the crane must be roped off and personnel must be warned of the reason for the precaution, if possible.

22. Repairs and adjustments should be made only by properly designed and authorized personnel. When a crane is being repaired, the maintenance man is in charge of all phases of crane movement and operation, and his instructions should ordinarily be obeyed without question. Only if his instructions are contrary to safe operating practices should the operator question them. Under these circumstances, the maintenance supervisor should be contacted at once for decision.

This publication provides practical loss control and safety information to assist you in making your workplace safer. It is not legal advice. SAIF Corporation has made every effort to bring significant Oregon Occupational Safety and Health Administration (OR-OSHA) regulations to your attention. Nonetheless, compliance with OR-OSHA remains your responsibility. You should read and understand all relevant OR-OSHA regulations that apply to your job site(s). You may want to consult with your own attorney regarding aspects of OR-OSHA which may affect you.

Note: The information in this publication is time sensitive. Do not rely upon this document if its publication date is more than three years old.

Please check the “Working Safely” section of our web site at www.saif.com for a more recent, printable copy. You’ll also find a variety of other valuable safety information designed to help your business prevent injuries and control costs.


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Crane Operation - Saif · 2020-05-20 · Safety Challenges Crane Operation Have all signals reviewed by the crane operator and signal person prior to the job start. The use of cranes