1. General Principles

1.1 In order to ensure the safety of construction site personnel in all development projects of the company and ensure safe production, this safety operation standard is specially formulated.

1.2 When working on-site, high-risk personnel should not only comply with the management provisions of this standard, but also comply with the relevant national mandatory standards, specifications and procedures.

1.3 This standard applies to all development projects of the company.

2. Standards, regulations and specifications related to engineering safety

"Safety Rules for Construction Lifts" GB10055-96

"Safety Rules for Construction Hoists" GB13329-91

"Safety Code for Electricity Supply and Consumption at Construction Sites" GB50194-93

"Safety Technical Regulations for the Use of Construction Machinery" JGJ33-2001

"Construction Site Temporary "Technical Specifications for Electricity Safety" JGJ46-2005

"Safety Technical Specifications for Gantry and Derrick Material Hoist" JGJ88-92

"Safety Rules for Gondolas Working at Height" JG5027-92

"Safety Regulations for Tower Cranes" GB5144-94

Other relevant norms and regulations

3. Safety management measures for high-risk personnel at construction sites

3.1 General provisions

3.1.1 High-risk workers at the construction site mainly include: drivers, operators, erectors, electricians, welders and other special workers of various machinery, and workers who use power tools and personnel working at high altitudes and suspended in the air.

3.1.2 Workers participating in construction (new workers, interns, migrant workers, contract workers, etc.) must be familiar with the safety technical operating procedures of this type of work and abide by the relevant regulations on safe production and civilized construction at the construction site , stick to your job and perform your job responsibilities.

3.1.3 Correctly use personal protective equipment and safety protection measures. Seat belts, safety helmets, and safety nets must be inspected regularly, and those that do not meet the requirements are strictly prohibited from use.

3.1.4 It is strictly prohibited to operate under the influence of alcohol. It is strictly prohibited to enter the construction site wearing slippers or bare feet.

3.1.5 When constructing at high altitudes or on steep slopes without protective measures, safety belts must be fastened. Protective sheds or other safety isolation measures must be installed at entrances and exits where it is dangerous to cross up and down. Those working more than 2 meters above the ground must have protective railings, baffles or safety nets, safety helmets, and safety belts.

3.1.6 Special operations personnel must hold a certificate and have at least one year of work experience.

3.1.7 Personnel working in special, high-altitude, and suspended operations must be in good health. Personnel with diseases that are not suitable for high-altitude operations are strictly prohibited from performing special operations or high-altitude operations. The continuous working time of special, high-altitude and suspended workers shall not exceed three hours, and the continuous working time in open-air high temperature environment shall not exceed two hours.

3.1.8 Construction enterprises must work with supervisors to conduct safety education and training on professional techniques and specific safety measures for high-risk workers every week.

3.1.9 High-risk workers must strictly abide by various safety management systems and measures. Otherwise, they must be cleared from the site immediately.

3.2 Requirements for safe operation of cranes

3.2.1 Lifted objects should be tied securely, and the hook suspension point should be on the same vertical line as the center of the suspended object. It is strictly prohibited to pull it sideways. Hang. When dropping the hook, prevent the hanging object from partially landing on the ground and causing the hanging rope to deflect. It is strictly forbidden to loosen the hook when the hanging object is not fixed.

3.2.2 When lifting large or irregular components, slide ropes should be tied on both sides of the hanging piece.

3.2.3 It is strictly prohibited for people or persons to pass under the lifting boom and hoisted objects, and irrelevant personnel are not allowed to stay in the lifting area.

3.2.4 When the hoisted weight exceeds 70% of the rated load, when the hoisted object is lifted 10 cm from the ground, stop lifting and inspect it, and then lift it after confirming that it is in good condition.

3.2.5 Lifting heavy objects must not stay in the air for a long time. When staying in the air for a short time, operators and commanders must not leave their jobs.

3.2.6 If the crane encounters a mechanical failure during work, the heavy object should be put down before troubleshooting. If heavy objects cannot be lowered due to crane failure, appropriate insurance measures must be taken.

3.2.7 When the wind reaches Level 5, no lifting operations with a large wind surface shall be carried out. When the wind reaches Level 6 or above, no lifting operations shall be carried out.

3.2.8 No lifting operations are allowed when encountering severe weather such as heavy snow, heavy fog, thunderstorms or insufficient lighting, where the commander cannot see clearly or the operator cannot see clearly the command signal.

3.2.9 Strictly implement the "ten no hanging" system.

3.2.10 The lifting rope must be strictly calculated to prevent rope breaking accidents.

3.2.11 Command signals (signal flags, signal whistles, walkie-talkies) must be used during lifting operations, and the command signal must not be replaced by hand alone.

3.2.12 Commanding and lifting personnel must be focused when working, and it is strictly prohibited to work while drunk.

3.3 Requirements for safe operation of elevator drivers for both human and cargo use

3.3.1 They must undergo safety technical training and obtain a special operation certificate before they can operate independently.

3.3.2 Must be in good health, with good vision in both eyes, no color blindness, no hearing impairment in both ears, no high blood pressure, heart disease, epilepsy, dizziness or sudden illness, and no obstruction to operation diseases and physical defects.

3.3.3 You must be familiar with the performance and structure of the elevator you operate, and operate in accordance with the relevant regulations of the elevator. Illegal operations are strictly prohibited. You should be familiar with the maintenance and repair knowledge of elevators and perform daily maintenance on elevators according to regulations.

3.3.4 Carefully complete the shift handover procedures or records, check the completion and recording matters of the elevator shift record, and carefully fill in the operation record.

3.3.5 Before starting work, check the technical condition of the elevator, check the firmness of the bolts, horizontal and vertical supports, platforms and protective doors, wire ropes and pulleys, transmission systems, electrical lines, instruments, accessories and operating buttons, etc. , if an abnormality is found, it should be eliminated in time. If it cannot be eliminated, it should be reported in time. No work should be carried out before the abnormality is eliminated.

3.3.6 Check the limiters and safety devices of each part. After the inspection is correct, first raise the ladder cage to 1 meter above the ground and stop to check whether the braking meets the requirements, and then continue going up. Test the operation of the unloading platform, protective door, upper limit, and front and rear door limits. Operation can only be started after confirming that they are normal.

3.3.7 The elevator must sound the whistle before starting operation. The driver is not allowed to leave the operating position before the power switch of the elevator is cut off. After the operation, lower the elevator to the ground floor, turn all control switches to zero, cut off the power supply and lock the distribution box and elevator door.

3.3.8 Overloading and overcrowding are strictly prohibited. Cargo must be evenly distributed to prevent unbalanced loading. Materials must not exceed the ladder cage. People are prohibited from getting on or off before reaching the specified stopping position.

3.3.9 When running to the upper and lower ends, it is not allowed to stop at the limited position (except for inspection and maintenance). Maintenance operations are strictly prohibited during operation. When one cage of a double-cage elevator is undergoing maintenance outside the cage, The other ladder cage must not be operated.

3.3.10 In the event of severe weather such as thunderstorms, strong winds above level 6, heavy fog, etc., which may cause icing, etc., the operation should be stopped. If the lights and signals are unclear, the operation should be stopped. If a mechanical failure occurs in the elevator, it has not been completely eliminated. The operation should be stopped before the breakage of the wire rope exceeds the specified limit. The operation should be stopped.

3.3.11 After a storm, safety inspections should be carried out on the elevator's base, power supply, grounding, bridge crossing, temporary supports, etc.

3.4 Requirements for safe operation of electricians

3.4.1 All distribution boxes should be marked with their name, purpose and branch mark.

3.4.2 All distribution box doors should be equipped with locks, and distribution boxes and switch boxes should be used and managed by certified electricians.

3.4.3 All distribution boxes and switch boxes should be inspected and repaired once a month. Inspection and maintenance personnel must be professional electricians. During inspection and maintenance, they must wear insulating protective equipment and use electrical insulating tools as required. When inspecting and repairing distribution boxes and switch boxes, the corresponding power switch at the previous level must be opened and powered off and a power outage sign must be hung. Live work is strictly prohibited.

3.4.4 All distribution boxes and switch boxes must follow the following operating sequence during use:

3.4.4.1 Power transmission operation: main distribution box → distribution power box → switch box.

3.4.4.2 Power outage operation: switch box → distribution box → main distribution box (except for emergencies of electrical failure).

3.4.5 When the construction site stops working for more than one hour, the power switch box should be cut off, locked and marked.

3.4.6 The operator of the switch box must be familiar with the correct operation method of switching electrical appliances.

3.4.7 No debris shall be placed in the distribution box and switch box and must be maintained regularly and tidy.

3.4.8 No other temporary electrical equipment shall be installed in distribution boxes and switch boxes at will, and power cords shall not be cut or connected indiscriminately.

3.4.9 When replacing the melt of the fuse, it is strictly forbidden to use the melt that does not meet the original specifications or metal bodies such as iron wire, copper wire, iron nails, etc. instead.

3.4.10 The incoming and outgoing wires of distribution boxes and switch boxes must not withstand external forces. It is strictly prohibited to hang clothes and other daily utensils to dry, and it is strictly prohibited to come into contact with sharp metal fractures and strong corrosive media.

3.4.11 Installation, maintenance or removal of temporary electrical works must be completed by electricians. The electrical technical level should be adapted to the difficulty and technical complexity of the project.

The above safety standards for high-risk workers at construction sites are collected and compiled by Zhongda Consulting

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