Circular No. 51/2016/TT-BLDTBXH Issuing National Technical Regulations on Occupational Safety for Cranes

CIRCULAR

Issuing Technical Standards on Occupational Safety for Cranes

__________________

Pursuant to the Labor Safety LawNo. 84/2015/QH13 dated June 25, 2015;

Pursuant to Decree No. 39/2016/ND-CP dated May 15, 2016 of the Government detailing the implementation of certain provisions of the Labor Safety and Health Law;

Pursuant to Decree No. 106/2012/NĐ-CP dated December 20, 2012, of the Government, stipulating the functions, tasks, powers, and organizational structure of the Ministry of Labor, Invalids, and Social Affairs;

At the proposal of the Director of the Occupational Safety and Health Inspectorate;

The Minister of Labor, Invalids and Social Affairs issues this Circular to issue Technical Standards on Occupational Safety for Cranesầ.

1. Organizations and individuals producing, importing, distributing, installing, using, repairing, maintaining, and servicing elevators shall be responsible for complying with the regulations set forth in the standard issued together with this Circular.

Accompanying this Circular are Technical Standards on Occupational Safety for Cranes.

Code: QCVN 29:2016/BLDTBXH.

Article 2. Implementation

1. Organizations and individuals producing, importing, supplying, using, and repairing cranes shall be responsible for implementing the provisions of the standards issued with this Circular.

2. Organizations conducting inspection and certification of compliance with crane standards must comply with the provisions of the standards issued with this Circular.

3. Ministries, ministerial-level agencies, government-affiliated agencies, provincial People's Committees under central cities, and related organizations and individuals are responsible for enforcing this Circular.

Article 3. Effectiveness

1. This Circular takes effect from August 1, 2017.

2. In the course of implementation, if there are any difficulties, please report them to the Ministry of Labor, Invalids and Social Affairs for study and resolution./.

      

QCVN 29:2016/BLDTBXH

NATIONAL TECHNICAL STANDARDS ON OCCUPATIONAL SAFETY FOR CRANES

National technical regulation on safe work for Cranes

 

Foreword

QCVN 29:2016/BLDTBXH - National technical standards on occupational safety for cranes compiled by the Department of Labor Safety and issued pursuant to Circular No. 51/2016/TT-BLDTBXH dated December 28, 2016, following the review comments of the Ministry of Science and Technology.

 

NATIONAL TECHNICAL STANDARDS ON OCCUPATIONAL SAFETY FOR CRANES

National technical regulation on safe work for Cranes

 

1. General Provisions

1.1. Scope of Application

These standards specify requirements for occupational safety for various types of cranes used for transporting products and goods.

These standards apply to self-propelled cranes classified according to TCVN 8590-2:2010 (ISO 4301-2:2009) Cranes - Classification according to operating conditions - Part 2: Self-propelled cranes.

These standards do not apply to hand-operated cranes, cranes installed on cargo ships, or tower cranes.

1.2. Applicability

These standards apply to:

1.2.1. Organizations and individuals producing, importing, supplying, using, and repairing cranes.

1.2.2. State management agencies and other related organizations and individuals.

1.3. Definitions

In these standards, the following terms and definitions from the following standards are used:

- National Standard TCVN 7549-1:2005 (ISO 1248-1:1997) Cranes - Safe use - Part 1: General requirements;

- National Standard TCVN 5208-1:2008 (ISO 10972-1:1998) Cranes - Requirements for working mechanisms - Part 1: General requirements.

2. Technical Provisions

2.1. Requirements for design criteria

2.1.1. General design and layout

When designing and laying out crane mechanisms, attention must be paid to considerations based on:

- Purpose of use;

- Functional use of each mechanism;

- Accuracy of the mechanism;

- Vibration and noise levels within permissible limits;

- Convenience in installation, operation, repair, or maintenance;

- Limiting drive devices and indicating, warning devices;

- Manufacturer's guidance;

- Interchangeability of parts;

- Environmental conditions and risks;

- Conditions ensuring safety for workers operating cranes.

2.1.2. Requirements for part durability

When selecting parts of the mechanism, the load conditions applicable to that part such as maximum load value, load spectrum, number of load cycles must be selected corresponding to the specified technical characteristics of the part.

2.2. Requirements for power source

The power source of the mechanism must be electric motors, hydraulic, pneumatic, or internal combustion engines.

The crane mechanism must have sufficient power and torque to control movement. Gravity, inertia force, wind force during operation, friction force, and mechanism efficiency must be included in the calculation.

2.3. Requirements for couplings

2.3.1. General Requirements

The selection of coupling type must be based on the general design of the mechanism, purpose of use, and required technical features to avoid vibration and unwanted reaction forces. Selection must follow the manufacturer's instructions.

2.3.2. Requirements for shaft couplings

When wedge-type shaft couplings (such as one-way roller clutches or roller stop devices) are used in cranes, they must form a mechanical locking pin to prevent damage, or the coupling must be designed to transmit torque at least twice the maximum torque of the shaft in the drive system.

Dry friction couplings must be protected against rainwater and liquids like oil and lubricants.

Couplings must be mounted on the shaft so that they can be adjusted when necessary to compensate for wear.

The maximum allowable torque of the coupling must be at least equal to the impact torque appearing throughout the operating process at any working temperature, taking into account the frequency of impacts and allowable wear.

2.4. Requirements for brakes

Brakes must be able to stop any movement of the crane.

Emergency stopping brakes must be automatic stopping brakes in case of power source failure. Emergency stopping brakes must ensure acceleration and braking values compatible with the design parameters for full load conditions.

2.4.1. Brakes of lifting mechanisms

The brake system must be designed to hold loads at 1.6 times the lifting capacity. During dynamic brake testing, the brake must hold the load without losing braking effectiveness and without overheating.

For emergency lowering, the brake of the lifting mechanism must be capable of releasing the brake manually so that load control is maintained throughout the lowering process. Emergency lowering must be carried out easily according to the user manual, considering the brake's cooling capability.

The nominal braking torque of the lifting mechanism's brake must be at least 1.5 times the torque caused by the load on the brake shaft.

Cranes used to transport molten metal or equivalent hazardous materials must be equipped with measures to prevent load drop due to failure of any part in the drive system of the mechanism. This requirement is met by one of the following options:

- Using a backup system;

- An emergency stopping brake on the cable drum that is interlocked with the reserve cable drive.

When the total load capacity exceeds 16 tons, the crane must be designed with at least two higher work class levels than the required work class under normal operating conditions, and M5 shall be the smallest work class (The work class is determined according to Section 4.3 TCVN 8590-1:2010 (ISO 4301-1:1986) Crane - Classification according to work class - Part 1: General requirements).

2.4.2. Brakes for the movement mechanism and the rotating mechanism

The brakes for the movement mechanism and the rotating mechanism must have the ability to stop the crane's movement under the most adverse load conditions.

2.5. Equipment for non-operating state

When the mechanism is not in use, its position must be maintained by devices such as brakes or locking devices. These devices must ensure prevention of unintended random movements. Such equipment should be automatic when the power supply to the crane is interrupted or when the crane is placed in a non-operating state.

The installation of locking devices must prevent errors during installation and removal of the lock pins.

2.6. Requirements for hydraulic and pneumatic systems

2.6.1. The hydraulic system and the arrangement of control elements must be within the range of operator control, except where necessary for the operation of safety devices or interlocking mechanisms.

2.6.2. Hydraulic circuits and pneumatic circuits must take into account the following safety features:

- Safety valves must be installed in hydraulic or pneumatic circuits with pressure to limit the maximum pressure in the system;

- There must be safety devices protecting against effects caused by damage to pipes or auxiliary equipment in any loaded circuit of the crane.

2.6.3. All parts and controls of the system must be capable of handling the design load and must ensure the safe function of the crane under regular, infrequent, and abnormal working conditions, taking into account power source failures and system testing.

2.6.4. All parts and liquids (in the hydraulic system) must be compatible with the application conditions and operating environment.

2.6.5. During technical diagnosis for troubleshooting, pressure test points must be located appropriately within the system and clearly marked on the hydraulic circuit diagram.

2.6.6. The selection or design calculation of hydraulic cylinders must be based on the maximum pulling and compressing loads acting on the cylinder throughout the working cycle. Suitable calculations and selections must be made for pressure and flow rate to minimize fluid loss and excessive temperature rise.

2.6.7. High-lift hoisting mechanisms must be equipped with drum-type brakes or other braking mechanisms to prevent the drum from turning downward, keeping the load from falling and being controlled from the control station.

2.6.8. Oil Tank

The oil tank must maintain a safe level of hydraulic fluid reserve during operation; it must be able to contain all hydraulic fluid flowing back into the tank from the system with cylinders in the closed position and provide sufficient fluid to help cool the hydraulic fluid, ensuring that the oil temperature remains within the specified limits provided by the supplier.

2.6.9. Filters

The system must be equipped with filters to clean contaminants from the hydraulic fluid or supply source.

Filters must be selected and installed so that they can be changed without affecting the piping system and fluid consumption from the tank. If the brake is opened hydraulically, the filter must not be placed on the return oil line of the brake control circuit.

Filters must be selected and installed so that they can be changed without affecting the pneumatic piping system.

2.6.10. Installation

The system must be installed to minimize external influences (such as atmospheric conditions, unauthorized interference, and mechanical impacts), avoiding damage to the system, residual stresses in the piping due to installation must be eliminated, and pipe support structures must be flexible enough to allow the installation of all rigid pipes.

All technical maintenance measures must be applied to prevent contaminants from entering the system during assembly and installation of components, and the system must be thoroughly cleaned before inspection.

Special hydraulic fluid used in the system must be clearly labeled and fixed at the oil level measurement point of the oil tank or recorded in the user manual. Other types of hydraulic fluid must not be used (including separately or mixed with the fluid specified for the system).

2.6.11. Hydraulic testing of the hydraulic system must ensure the following safety requirements:

2.6.11.1. Before conducting hydraulic system testing, the technical data of the components in the hydraulic system, as well as the connections of the pipes and pipe fittings, must be checked according to the technical documentation provided by the manufacturer.

2.6.11.2. Hydraulic system testing must be conducted using the working fluid according to the machine logbook. The working fluid temperature must comply with the allowable usage temperature and be measured at the filling location or another designated location according to the machine user manual. The condition and quantity of the working fluid in the container must be checked.

2.6.11.3. When testing the safe operation of hydraulic equipment, the following must be checked:

2.6.11.3.1. The operation of the control components;

2.6.11.3.2. The operation of all safety valves;

2.6.11.3.3. Load drop prevention devices in case of pipe damage;

2.6.11.3.4. The operation of signaling devices and testing tools;

2.6.11.3.5. The adjustment of pressure limiting devices;

2.6.11.3.6. Protection of pipes from mechanical damage;

2.6.11.3.7. Easy and safe access to adjustable or replaceable components;

2.6.11.3.8. Protection of pressure adjusting components of the hydraulic system from unauthorized intervention;

2.6.11.3.9. The lifting capability of the hydraulic system.

2.7. Requirements for gear drives

2.7.1. Durability requirements

The stress generated under any working condition must not exceed the permissible value according to the manufacturer's instructions.

2.7.2. Gears

The gears must be produced from materials with characteristics suitable for the purpose of use and the lifespan of the gears.

The size of the gears must be calculated based on the nominal torque value, material strength, and gear drive group.

The type of connection must not generate any unauthorized stress on the gears.

Reversibility (non-reversibility) must be avoided for gear drives where the moment of inertia of the driven part is greater than that of the driving part.

2.7.3. Gear Covering

Gears must be shielded to avoid danger during normal operation or maintenance.

When gear drives are placed inside gearboxes, the gears must be lubricated with oil or grease using appropriate oil or grease seals.

The structure supporting the gearbox housing must ensure the safe and secure position of the box and prevent it from moving during operation.

The construction of the gearbox housing must be sufficiently robust to maintain the straightness of the shafts supporting the gears and the distance between shaft centers under all working conditions.

The gearbox housing must be equipped with sufficient oil drain holes, vent pipes, oil level indicators, and must allow easy access to them.

The gearbox housing must have lifting ears for lifting the box during transportation and installation.

For all gearbox housings, it must ensure proper lubrication of all gears and bearings.

2.7.4. Bearings and Shaft Supports

Bearings and bearing support structures must be designed so that bearing failures do not lead to the falling of any main crane components or loads.

2.8. Requirements for Cable Drives

In designing cable drives, uneven load distribution among cable branches must be considered if it cannot be excluded during design.

Cable balancing devices must be arranged in the cable layout to allow cables to move on the balancing device without slipping between the cable and the balancing device.

2.8.1. Drum

The drum must be manufactured from materials with characteristics suitable for its purpose of use and lifespan.

If a single layer of cable cannot be wound onto the drum, special attention must be paid to measures to ensure accurate winding from one layer to the next (cable guide, if necessary) under all working conditions.

Drums with grooved cable paths must be designed such that when the cable is fully unwound (at the outermost position), at least two turns of cable remain on the drum before the fixed end of the cable. At the innermost position of a single-layer drum (when the cable is fully wound up), the length of the grooved section must leave at least one turn of cable unwound.

The thickness of the drum wall must be determined by calculation or testing. If neither calculation nor testing is performed, additional wear allowance must be added to the drum wall thickness. The value of the wear allowance must take into account factors such as material hardness, environment, and usage conditions.

The drum must be designed so that the cable does not run off the end of the drum.

For single-layer drums, a drum flange, cable guide, and limit switch must be used to prevent cable bunching on the drum.

Multi-layer drums must have a flange at the point where the cable begins to wind onto the next layer.

The drum flange and other travel-limit surfaces must be flat and must protrude above the surface of the outermost cable layer by at least 1.5 times the cable diameter.

The cable groove on the drum must be a circular arc with a radius not less than 0.525 times the nominal diameter of the cable. The tolerance of the cable diameter must be taken into account when determining the radius of the cable groove.

The depth of the cable groove must not be less than 0.33 times the nominal diameter of the cable.

The cable groove must have a smooth and defect-free surface to prevent cable damage, sharp edges must be rounded.

Fixing the cable end on the drum, along with two turns of cable reducing the load through friction, must be able to withstand a tensile force not less than 2.5 times the nominal tensile force of the cable. In calculating the friction between the cable and the drum, it must not exceed 0.1.

If cable clamps are used to fix the cable end on the drum, the number of cable clamps must be two or more. Fixing the cable end on the drum must not reduce the cable breaking strength by more than 20%.

Fixing the cable end must ensure safety and ease of access. If there are two or more cable layers wound on the drum, they must be adjustable in length at the cable end fixing position.

2.8.2. Pulley

The cross-section of the pulley groove bottom must have a curved radius compatible with the cable size. The two sides of the pulley groove must be within 0.525 to 0.630 times the nominal diameter of the cable. The two sides of the pulley groove, tangent to the bottom curve and symmetrical about the groove centerline, form an angle between 30° and 60°. The maximum allowable skew angle between the cable centerline and the pulley groove centerline must be selected according to the angle between the two sides of the pulley groove.

The depth of the pulley groove must not be less than 1.5 times the nominal diameter of the cable. The surface of the pulley groove must be free of defects to prevent cable damage. Sharp edges must be rounded.

2.9. Shafts

Shafts must be designed to withstand all bending and torsional stresses or combinations thereof. Allowable stress must be taken for cyclic symmetric stress and increased stress due to factors such as gear teeth, pins, changes in cross-section, etc.

2.10. Requirements for Load Carrying Equipment

Load carrying equipment dimensions must be calculated based on the largest nominal load. The design, production, and materials of the load carrying equipment must ensure that fatigue and brittle fracture are avoided.

Hoists must be equipped with safety latches, which must automatically close and span across the hoist hook mouth to prevent cables, chains, etc., from slipping out of the hook in a slack state.

The hoist assembly must have sufficient weight to ensure it can descend in all designed working conditions.

The hoist assembly must have a fixed label on the hook indicating the nominal lifting capacity.

2.11. Production, Repair, and Maintenance

The assembly work structure must be produced in accordance with the requirements for mating tolerances. High-strength clamping parts (such as bolts, pins, hooks, etc.) must be tightened to the correct torque. Suitable jigs must be used during production to ensure that components are aligned according to specific technical requirements in the drawings.

Persons undertaking tasks in production, repair, and maintenance must have appropriate expertise corresponding to each specific task.

Proper lubrication must be ensured for the drive components of the mechanism and bearings. Lubrication points must be accessible except for centralized lubrication points.

2.12. Safety requirements for disassembly and assembly of cranes

2.12.1. Disassembly and assembly work of cranes must comply with the requirements specified in Section 9 of TCVN 7549-1:2005 and must be carried out according to the assembly and disassembly technology procedures provided by the manufacturer or installation unit.

The disassembly and assembly unit must disseminate the disassembly and assembly technology procedures and safety measures to those involved in the disassembly and assembly process.

2.12.2. During the disassembly and assembly process, hazardous areas must be identified. Hazardous areas must be marked with warning signs and measures taken to prevent unauthorized personnel from entering.

2.12.3. Disassembly and assembly work of cranes at heights or outdoors must be suspended during heavy rain, thunderstorms, typhoons, or winds of force 5 or higher.

2.12.4. Persons performing disassembly and assembly work of cranes at heights over 2 meters must have health conditions confirmed by authorized health authorities and must use safety belts.

2.12.5. During the disassembly and assembly process, it is not allowed:

- To leave loads hanging on the hook when the crane stops operating;

- To use guardrails or other preventive equipment as support for jacks or hoists;

- To throw any objects from a height;

2.12.6. When positioning a crane, a survey must be conducted to calculate the load-bearing capacity of the location, terrain, structures, and surrounding activities to safely arrange the working equipment.

2.12.7. The crane positioning must meet the following requirements:

2.12.7.1. Comply with the requirements specified in Section 8 of TCVN 7549-1:2005.

2.12.7.2. Ensure static load testing, when lifting loads, dragging of the load is not allowed, and the load must be lifted above obstacles on the travel path by at least 500mm.

2.12.7.3. Ensure that during operation, the distance from any part of the crane's rotating section to surrounding structures, equipment, materials, etc., must not be less than 700mm.

2.12.7.4. Ensure safe distances when positioning the crane within the protection zone of overhead power lines according to regulations and obtain permission from the power line management authority.

2.12.8. In cases where the working range is too narrow, crane components and loads may move outside the working range during operation, then a safe installation and operation plan must be established and approved by the competent authority.

2.12.9. If two or more cranes are placed in the same area, technical measures must be taken to prevent them from colliding during use.

2.12.10. Self-propelled cranes are not allowed to be placed on surfaces with slopes greater than the allowable slope specified by the manufacturer, and they cannot be placed on recently filled ground that has not been compacted.

2.13. Requirements for Cabins

Crane cabins must comply with the requirements specified in TCVN 5205-1:2013 (ISO 8566-1:2010) Cranes - Cabins and Control Stations - Part 1: General Requirements. Additionally:

2.13.1. For self-propelled cranes, the cabins must also comply with the provisions specified in TCVN 5205-2:2008 (ISO 8566-2:1995) Cranes - Cabins - Part 2: Self-Propelled Cranes.

2.13.2. For tower cranes, the cabins must also comply with the provisions specified in TCVN 5205-3:2013 (ISO 8566-3:1910) Cranes - Cabins and Control Stations - Part 3: Tower Cranes.

3 Management Provisions

3.1. Technical documentation of cranes includes:o 3.1.1. A general description must include: the name and address of the manufacturer, model, code, year of manufacture, permitted lifting capacity, motor power, operating principle, and main technical features of the system (control equipment, safety devices, overload limiting mechanisms, lifting mechanisms), applicable standards and regulations for cranes.

3.1.2. Schematic diagrams of the operating principles.

3.1.3. Assembly drawings of crane mechanisms.

3.1.4. Overall drawings of the crane indicating dimensions and main parameters.

3.1.5. Inspection and load testing procedures, troubleshooting and repair procedures.

3.1.6. Usage and installation instructions.

3.1.7. Regular inspection, repair, and maintenance schedules.

3.1.8. Operating modes of cranes and safety devices.

3.2. Domestic-produced cranes

Organizations and individuals producing cranes must ensure quality management requirements as follows:

3.2.1. Must have complete technical documentation as stipulated in Section 3.1 of this Standard.

3.2.2. Must be certified as compliant with the provisions set forth in Section 4.1.1 of this Standard.

3.2.3. Must register and publish compliance as required.

3.2.4. Must affix compliance marks before being supplied to the market.

3.3. Imported cranes

Organizations and individuals importing cranes must ensure quality management requirements as follows:

3.3.1. Must have complete technical documentation as stipulated in Section 3.1 of this Standard.

3.3.2. Must be certified as compliant according to the provisions set forth in Section 4.1.2 of this Standard.

3.3.3. Are exempt from import inspections if imported under bilateral or multilateral agreements between the competent authorities of the Socialist Republic of Vietnam and exporting countries which stipulate that quality inspections are not required upon import.

3.4. Cranes supplied to the market

3.4.1. Only sale and transfer of cranes that have been certified as compliant and affixed with compliance marks as required shall be carried out.

3.4.2. The seller or transferee of the crane must be responsible for the quality of the crane announced and must provide complete technical documentation as stipulated in Section 3.1 of this Standard.

3.4.2. The seller or the transferrer of the crane shall be liable for the quality of the crane as published and shall provide all technical documents in accordance with Section 3.1 of this Standard.

3.4.3. For cranes of unknown origin or lacking complete technical documentation as required, the seller or transferee must prepare new technical documentation and bear full responsibility for the accuracy of such documentation prior to sale or transfer.

3.5. Crane Safe Usage Management

3.5.1. Cranes shall be operated, maintained, and serviced according to the instructions provided by the manufacturer or producer.

3.5.2. Safety Requirements for Crane Usage

3.5.2.1. Only cranes in good technical condition and within their inspection validity period shall be used. If during operation it is found that the crane does not meet safety requirements, the user may request an early inspection.

3.5.2.2. Cranes shall only be used in accordance with their specified functions, effects, and technical characteristics as defined by the manufacturer or producer. Overloading beyond the crane's capacity is strictly prohibited.

3.5.2.3. Crane transportation over workshops, residential areas, or places where people are present shall only be permitted if specific safety measures are implemented to eliminate the risk of accidents and incidents.

3.5.2.4. During crane operation, the following actions are prohibited:

- Climbing on or off the crane while it is in operation;

- Being within the swing radius of the crane's rotating part;

- Lifting or moving loads when there are people standing on them;

- Lifting loads that are unstable or only partially hooked;

- Lifting buried or compressed loads, or those connected by bolts or concrete to other objects;

- Lifting loads exceeding the crane's capacity corresponding to its reach and auxiliary support leg position;

- Dragging or pulling loads;

- Using both human push or pull and mechanical lifting mechanisms simultaneously;

- Using the crane to lift people;

- People being under the load being lifted;

- Operating the crane when the cable is jammed or has come out of the pulley groove;

3.5.2.5. When mobile overhead cranes are in operation, access routes to and from the tracks must be fenced off.

3.5.2.6. People are prohibited from being on the walkways of mobile overhead cranes while they are in operation. Cleaning, lubrication, and repair work can only be performed when appropriate safety measures have been taken to prevent falls, electric shocks, etc.

3.5.2.7. The user entity must establish and implement a system for signal exchange between the person attaching the load and the crane operator. Signals must be clearly defined and distinguishable from other surrounding signals.

3.5.2.8. When the crane operator cannot see the load throughout the lifting and movement process, a signaling person must be assigned.

3.5.2.9. When lifting and moving loads near structures, equipment, or obstacles, safety must be ensured for these structures, equipment, and nearby people.

3.5.2.10. Outdoor cranes shall not be used to hang banners, posters, slogans, or any other items that increase wind resistance.

3.5.2.11. Loads must be lowered to predetermined positions where the risk of falling, spilling, or sliding is eliminated. Rigging components can only be detached from the hook once the structure or assembly parts are securely fixed and stable.

3.5.2.12. Before lowering a load into a trench, pit, well, etc., the unloaded hook must be lowered to the lowest position to check the remaining cable wraps on the drum. If more than 1.5 wraps remain on the drum, lifting and lowering operations may proceed.

3.5.2.13. Crane operation must be halted when:

- Cracks are discovered in critical metal structural components;

- Excessive deformation of metal structures is detected;

- Any brake mechanism is found to be faulty;

- Hooks, cables, pulleys, drums show excessive wear, cracks, or other damage;

3.5.2.14. When loading onto transport vehicles or mobile platforms, stability of the transport vehicle or platform must be ensured.

3.5.2.15. The person attaching the load must approach the load only after it has been lowered to a height no greater than 1 meter above the floor where the person is standing.

3.5.2.16. Cranes must undergo regular maintenance. Damaged or worn-out parts must be repaired or replaced.

3.5.2.17. When repairing or replacing crane components, safety measures must be implemented.

After repairs or replacements of important parts such as metal structures, cables, hooks, brakes, etc., a load test must be conducted before the crane is put back into service.

3.5.2.18. Prior to use, cranes must be affixed with inspection labels and marked as prescribed.

3.5.2.19. Each crane must maintain a logbook for maintenance and repairs as stipulated by the manufacturer.

3.5.2.20. Cranes must be used, transported, stored, maintained, and serviced according to the manufacturer's instructions.

3.5.2.21. Requirements for Crane Operators

3.5.2.21.1. Crane operators must comply with the minimum requirements set forth in Section 5.3.2 of TCVN 7549-1:2005.

3.5.2.21.2. Loaders and unloaders must comply with the minimum requirements set forth in Section 5.4 of TCVN 7549-1:2005.

3.5.2.21.3. Signallers must comply with the minimum requirements set forth in Section 5.5 of TCVN 7549-1:2005.

3.5.2.21.4. Assemblers must comply with the minimum requirements set forth in Section 5.6 of TCVN 7549-1:2005.

3.5.2.22. The user entity must conduct periodic inspections of cranes as prescribed in Appendix A of TCVN 7549-1:2005.

3.5.2.23. Workers directly operating cranes must be equipped with personal protective equipment as required.

3.5.2.24. Those responsible for direct management, crane operators, and workers operating cranes must receive specialized training in accordance with the Vocational Education Law and safety and hygiene training in accordance with the Occupational Safety and Health Law and related guidance documents.

3.5.3. Cranes must have clear origins and complete documentation as required by Section 3.1 of this standard when put into use.

3.5.4. When putting cranes into use or ceasing their use and disposing of them, organizations and individuals must report to the Department of Labor, Invalids, and Social Affairs at the location where the cranes are used.

4. Compliance Certification and Technical Safety Inspection for Cranes

4.1. Conformity assessment certification for cranes

4.1.1. The conformity assessment certification for domestically produced cranes shall be carried out through method 5: typical sample testing and production process evaluation; monitoring through sampling testing at the place of production or on the market combined with production process evaluation if they are mass-produced; for individually manufactured cranes, the conformity assessment certification shall be conducted through method 8: full product testing or inspection (as specified in Appendix II of the Regulation on Declaration of Compliance with Standards and Technical Regulations and Assessment Methods issued together with Circular No. 28/2012/TT-BKHCN dated December 12, 2012 of the Minister of Science and Technology).

4.1.2. The conformity assessment certification for imported cranes shall be carried out through method 7: batch product or goods testing and evaluation if they are imported in batches; for individually imported cranes, the conformity assessment certification shall be conducted through method 8: full product testing or inspection (as specified in Appendix II of the Regulation on Declaration of Compliance with Standards and Technical Regulations and Assessment Methods issued together with Circular No. 28/2012/TT-BKHCN dated December 12, 2012 of the Minister of Science and Technology).

4.1.3. The conformity assessment certification shall be performed by a conformity assessment organization designated by the Ministry of Labor, Invalids and Social Affairs.

4.2. Safety technical inspection for cranes

4.2.1. Cranes must undergo initial inspection before being put into use, periodic inspection during use, or extraordinary inspection according to the inspection procedures issued by the Ministry of Labor, Invalids and Social Affairs and must be affixed with an inspection seal as prescribed.

The safety technical inspection of cranes must be conducted by a safety technical inspection organization for labor that has been certified by the Ministry of Labor, Invalids and Social Affairs to have the necessary conditions for conducting inspections.

4.2.2. Periodic inspection cycle for cranes:

4.2.2.1. The inspection cycle is once every two years for cranes operating under normal working conditions.

4.2.2.2. The inspection cycle is once a year for cranes that have been in use for over ten years.

4.2.2.3. The inspection period may be shortened upon request by the manufacturer or the user.

4.2.2.4. A safety technical inspection organization for labor may shorten the inspection period but must clearly state the reasons in the inspection report regarding technical issues ensuring crane safety during use.

5. Supervision, inspection, and handling of violations

5.1. The supervision and handling of violations of this Standard's provisions shall be carried out by the State Labor Inspectorate and the Occupational Safety and Health Inspectorate.

5.2. Quality control of crane production, importation, supply, and use shall be conducted in accordance with the Product Quality Law and this Standard.

6. Responsibilities of organizations and individuals

6.1. Organizations and individuals responsible for crane production, importation, supply, and use shall comply with the provisions of this Standard.

6.2. This Standard serves as the basis for quality control agencies to conduct inspections and also as the basis for conformity assessment organizations to perform conformity certification.

7. Implementation organizations

7.1. The Department of Occupational Safety and Health, Ministry of Labor, Invalids and Social Affairs shall be responsible for guiding and supervising the implementation of this Standard.

7.2. Local state management agencies on labor shall be responsible for guiding, inspecting, and supervising the implementation of the provisions of this Standard.

7.3. During the implementation process, if there are any difficulties, relevant agencies, organizations, and individuals shall promptly reflect them to the Ministry of Labor, Invalids and Social Affairs for consideration and resolution./.