ISO 12480-1:2008 Crane Safety Requirements Explained
ISO 12480-1:2008 "Cranes — Safe Use — Part 1: General" is the overarching standard governing the safe use of cranes. It establishes general principles for safe crane operation across all crane types, covering pre-operation inspections, safety operating procedures, hand signals for lifting operations, hazardous area management, and emergency response protocols.
Pre-Operation Safety Preparation
Before each shift, the following safety preparations are mandatory. Daily inspection of the equipment is carried out in accordance with the ISO 9927 Cranes — Inspections series. The operator performs a daily check of the crane's exterior condition, the functionality of all mechanisms, and the status of safety devices to confirm everything is in proper working order. The work area is inspected to ensure the ground is firm and level, free from underground utilities and overhead power lines, and clear of obstructions within the operating radius. Lifting accessories — hooks, lifting eyes, lifting slings, and wire ropes — are verified for correct selection and valid inspection certificates. The lifting plan is confirmed, including lifting points, load weight, and center of gravity, and hand signals are agreed upon. A pre-shift safety meeting communicates the day's tasks, potential hazards, and control measures, and confirms that all personnel are in position. Environmental conditions are checked: wind speed must not exceed the working limit, visibility must be at least 10 m, no thunderstorm conditions, and no ground anomalies. A trial lift is performed by raising the suspended load approximately 200 mm above the ground and holding it for at least 30 s to verify the brake and lifting accessories are functioning properly before proceeding with the full lift.
Crane Operating Safety Procedures
Safe operating requirements during the lifting process — Lifting must be slow and steady. First, tension the wire rope to confirm the lifting accessories are securely attached, then slowly hoist the load to approximately 200 mm above the ground. Check stability before continuing the lift. Jerking or rapid release of the load is strictly prohibited. During lifting and transport, the hook must remain directly above the load's center of gravity to prevent load swing. Slewing must be smooth, with acceleration and braking not exceeding 0.5 m/s² to avoid outward load swing caused by centrifugal force. No personnel are permitted under a suspended load. If the load must pass over personnel, a dedicated spotter must supervise the operation. Side pulling — operating the hook when it is not directly above the load's center of gravity — and dragging loads are prohibited. For tandem lifting with multiple cranes, the load on each crane must not exceed 75% of its rated capacity, and all movements are coordinated by a single lift director. For night operations, the work area illuminance must be at least 50 lux. After each lift is completed, the lifting accessories must be raised to a safe height or lowered to the ground. Kelude cranes are equipped with safety devices in accordance with ISO 12480-1.
| Operating Phase | safety requirements | Prohibited Actions |
|---|---|---|
| Lifting | Pre-tension Trial Lift200mm After Inspection Hoisting / Lifting | Jerking |
| Lifting and transport | Hookshaft alignmentcenter of gravity+Smoothly Slewing | Standing Under Load |
| Lowering the Hook | Slowly Align to Landing Point Lowering Dunnage | Impact Landing |
| Multi-cranetandem lifting | ≤75%Rated+Unified Command | Over75%Rated |
| Special Environment | Nighttime≥50lux | Lightning/Heavy Fog/High Wind |
Hoisting Signals & Emergency Response
Hand signals are the primary means of directing crane operations. To hoist, extend the arm upward with the index finger pointing up; to lower, point the index finger downward. A horizontal arm with the palm facing down signals stop, while both arms extended horizontally and waved side-to-side indicate an emergency stop. Whistle signals follow a similar pattern: one long blast for stop, two short blasts for hoisting, three short blasts for lowering, and rapid short blasts for an emergency stop. For wireless communication, all personnel must use a dedicated channel, announce their call sign before speaking, and repeat instructions back to confirm understanding.
In an emergency situation—such as a wire break or kink in the Wire Rope, loss of control over the suspended load, abnormal noise or vibration from the crane, or a sudden deterioration in weather—operators must immediately send an emergency stop signal. Once the emergency stop is activated, stabilize the suspended load and lower it slowly to a safe position. If lowering is not possible, cordon off the area, shut down the engine, disconnect the Power Supply, and file an incident report.
| emergency situation | Stop Signal | Follow-up Handling |
|---|---|---|
| Wire Rope Abnormality | Emergency Stop | Lower to Safe Position and Report |
| suspended load Loss of Control | Emergency Stop | Steadysuspended load |
| Abnormal noisevibration | Emergency Stop | Investigate Cause |
| Weather Deterioration | Cease Operations | Lockoutcrane |
| Personnel Injury | Emergency Stop | First Aid and Call for Help |
FAQ
Q: What are the specific requirements for a trial lift before operation?
A: Lift the suspended load approximately 200 mm (8 in) above the ground and hold for at least 30 seconds. Verify that the hoisting brake shows no slippage (lowering ≤ 10 mm), the wire rope is spooled evenly, and the load remains stable without tilting or swinging. Only proceed with the full lift once the brake and safety devices pass the functional check.
Q: What actions are prohibited during crane operation?
A: The following are strictly forbidden: pulling loads at an angle (when the hook is not directly above the load's center of gravity), dragging loads along the ground, standing beneath a suspended load, overloading, and sudden jerking or rapid lowering. For tandem lifting with multiple cranes, each crane must not exceed 75% of its rated capacity, and all movements must be coordinated by the designated lift supervisor.
Q: What types of hand signals are used for hoisting operations?
A: Hand signals (for hoisting, lowering, stop, and emergency stop), whistle signals (coded short and long blasts), and wireless communication (on a dedicated channel with verbal confirmation). A certified signaller must direct all lifts, and operations must stop immediately if communication is lost.
Q: What is the procedure for handling an emergency situation?
A: Upon detecting any abnormality, send an emergency stop signal and slowly lower the suspended load to a safe position. If lowering is not possible, secure the area with warning barriers, cut off the power supply, and file an incident report. Common emergency situations include wire rope damage, loss of load control, abnormal noise or vibration, and deteriorating weather conditions.
