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MINISTRY OF LABOR, WAR INVALIDS AND SOCIAL AFFAIRS |
THE
SOCIALIST REPUBLIC OF VIETNAM |
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No. 42/2019/TT-BLĐTBXH |
Hanoi, December 30, 2019 |
PROMULGATING NATIONAL TECHNICAL REGULATION ON SAFETY FOR LIFT
Pursuant to the Law on Technical Regulations and Standards dated June 29, 2006;
Pursuant to the Law on Quality of Products and Goods dated November 21, 2007;
Pursuant to the Law on Occupational Safety and Health dated June 25, 2015;
Pursuant to the Government's Decree No. 127/2007/ND-CP dated August 01, 2007 on elaboration of some Articles of the Law on Technical Regulations and Standards;
Pursuant to the Government's Decree No. 132/2008/ND-CP dated December 31, 2008 on elaboration of some Articles of the Law on Quality of Products and Goods;
Pursuant to the Government's Decree No. 39/2016/ND-CP dated May 15, 2016 on elaboration of some Articles of the Law on Occupational Safety and Health;
Pursuant to the Government's Decree No. 44/2016/ND-CP dated May 15, 2016 on elaboration of some Articles of the Law on Occupational Safety and Health on technical inspection of occupational safety, training in occupational safety and health and monitoring of occupational environment;
Pursuant to the Government's Decree No. 74/2018/ND-CP dated May 15, 2018 on amendments to the Government's Decree No. 132/2008/ND-CP dated December 31, 2008 on elaboration of some Articles of the Law on Quality of Products and Goods;
Pursuant to the Government's Decree No. 78/2018/ND-CP dated May 16, 2018 on amendments to the Government's Decree No. 127/2007/ND-CP dated August 01, 2007 on elaboration of some Articles of the Law on Technical Regulations and Standards;
Pursuant to the Government's Decree No. 14/2017/ND-CP dated February 17, 2017 defining the functions, tasks, powers and organizational structure of the Ministry of Labor, War Invalids and Social Affairs;
Following the appraisal opinion of the Ministry of Science and Technology in the Official Dispatch No. 4026/BKHCN-TĐC dated December 17, 2019;
At the request of the Director General of the Department of Work Safety;
The Minister of Labor, War Invalids and Social Affairs hereby promulgates National technical regulation on safety for lift.
Article 1. Name and code of the Regulation
Promulgated together with this Circular is the National technical regulation on safety for lift.
Code: QCVN 02:2019/BLĐTBXH.
1. Organizations and individuals manufacturing, importing, distributing, installing, using, repairing and maintaining lifts shall implement the provisions specified in this Regulation.
2. Organizations conducting technical safety inspections and bodies certifying conformity of lifts shall implement the provisions specified in this Regulation.
3. Ministries, ministerial agencies, Governmental agencies, People’s Committees of provinces and central-affiliated cities, and relevant organizations and individuals are responsible for the implementation of this Circular.
1. This Circular comes into force from July 01, 2021.
2. The Circular No. 08/2011/TT-BLĐTBXH dated April 22, 2011 promulgating QCVN 02: 2011/BLĐTBXH National technical regulation on safe work for electric lift; Circular No. 42/2013/TT-BLĐTBXH dated December 30, 2013 promulgating QCVN 18:2013/BLĐTBXH National technical regulation on safe work for hydraulic lift and Circular No. 48/2016/TT-BLĐTBXH dated December 28, 2016 promulgating QCVN 26:2016/BLĐTBXH National technical regulation on safe work for machine room-less electric lift of the Minister of Labor, War Invalids and Social Affairs shall cease to have effect from the effective date of this Circular.
3. Difficulties that arise during the implementation of this document should be promptly reported to the Ministry of Labor, War Invalids and Social Affairs for consideration and resolution./.
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PP.
THE MINISTER |
NATIONAL TECHNICAL REGULATION ON SAFETY FOR LIFT
Foreword
QCVN 02:2019/BLĐTBXH - National technical regulation on safety for lift is developed by the Department of Work Safety and promulgated together with the Circular No. 42/2019/TT-BLĐTBXH dated December 30, 2019 by the Ministry of Labor, War Invalids and Social Affairs after obtaining the appraisal opinion of the Ministry of Science and Technology. QCVN 02:2019/BLĐTBXH supersedes 03 national technical regulations below:
- QCVN 02:2011/BLĐTBXH National technical regulation on safe work for electric lift promulgated together with the Circular No. 08/2011/TT-BLĐTBXH dated April 22, 2011.
- QCVN 18:2013/BLĐTBXH National technical regulation on safe work for hydraulic lift promulgated together with the Circular No. 42/2013/TT-BLĐTBXH dated December 30, 2013.
- QCVN 26:2016/BLĐTBXH National technical regulation on safe work for machine room-less electric lift promulgated together with the Circular No. 48/2016/TT-BLĐTBXH dated December 28, 2016.
NATIONAL TECHNICAL REGULATION ON SAFETY FOR LIFT
1.1. Scope
1.1.1 This Technical Regulation specifies the safety rules for permanently installed new passenger or goods passenger lifts, with traction, positive or hydraulic drive, serving defined landing levels, having a car designed for the transportation of persons or persons and goods, suspended by ropes, chains or jacks and moving between guide rails inclined not more than 15° to the vertical.
Lifts and their safety components (with HS code: 8428.10.31, 8428.10.39, 8431.31.10, 8431.31.20) must comply with the requirements laid down in this document.
1.1.2 For the lifts in buildings for which documents proving that the design is appraised and construction permits are issued before the effective date of this Regulation are available or the lifts in existing buildings, where in some circumstances due to limitations enforced by building constraints, some requirements of this Regulation cannot be met, TCVN 6396-21 (EN 81-21) should be considered.
1.1.3 In addition to the requirements of this Regulation, supplementary requirements shall be considered in special cases (use of lifts by persons with disabilities, in case of fire, potentially explosive atmosphere, extreme climate conditions, seismic conditions, transporting dangerous goods, etc.).
1.1.4 This Regulation does not cover:
1.1.4.1 lifts with drive systems other than those stated in 1.1.1.
1.1.4.2 home lifts specified in QCVN 32:2018/BLĐTBXH National technical regulation on safe work for home lifts.
1.1.4.3 lifts with rated speed ≤ 0,15 m/s.
1.1.4.4 hydraulic lifts with a rated speed exceeding 1 m/s or hydraulic lifts where the setting of the pressure relief valve exceeds 50 MPa.
1.1.4.5 lifting appliances, such as paternosters, mine lifts, theatrical lifts, appliances with automatic caging, skips, lifts and hoists for building and public works sites, ships' hoists, platforms for exploration or drilling at sea, construction and maintenance appliances or lifts in wind turbines.
1.2. Regulated entities
This Regulation applies to:
1.2.1 Organizations and individuals designing, manufacturing, importing, distributing, installing, managing using, repairing and maintaining lifts.
1.2.2 Regulatory bodies and organizations and individuals concerned.
1.3. Terms and definitions
For the purposes of this document, the following terms and definitions apply:
1.3.1 room-less lift
electric lift with a drive motor, mechanisms and other components placed in the well.
1.3.2 hydraulic lift
lift in which the lifting power is derived from an electrically driven pump transmitting hydraulic fluid to a jack, acting directly or indirectly on the car (multiple motors, pumps and/or jacks may be used).
1.3.3 pulley room
room not containing the machine, in which pulleys are located, and in which the overspeed governor can also be housed.
1.3.4 rated load
load which is intended to be carried in normal operation, which may include handling devices.
1.3.5 rated speed
speed v in metres per second of the car for which the equipment has been built.
1.3.6 machine room
fully enclosed machinery space with ceiling, walls, floor and access door(s) in which machinery as a whole or in parts is placed.
1.3.7 safety component/device
Component/device provided to fulfil a safety function when in use.
Safety components include:
- Landing door locks and car door locks (if any);
- Safety gear;
- Drive machine braking system;
- Overspeed governor;
- Buffers;
- Rupture valves/one-way restrictors.
1.3.8 progressive safety gear
safety gear in which retardation is effected by a braking action on the guide rails and for which special provisions are made so as to limit the forces on the car, counterweight or balancing weight to a permissible value.
1.3.9 levelling
operation which achieves the accuracy of stopping at landings.
1.3.10 levelling accuracy
vertical distance between car sill and landing sill during loading or unloading of the car.
1.3.11 lift machine
unit which drives and stops the lift, including any motor, gear, brake, sheave/sprockets and drum (traction or positive drive lift) or comprising the pump, pump motor and control valves (hydraulic drive lift).
1.3.12 user
person making use of the services of a lift installation which includes passengers, persons waiting at the landings and authorized persons.
1.3.13 machinery space
volume(s) inside or outside of the well where the machinery as a whole or in parts is placed, including the working areas associated with the machinery.1
1.3.14 maintenance
all the necessary operations to ensure the safe and intended functioning of the installation and its components after the completion of the installation and throughout its life cycle.
Maintenance may include:
a) lubrication, cleaning, etc.;
b) checks;
c) the operations of setting and adjustment;
d) repair or changing of components which may occur due to wear or tear and do not affect the characteristics of the installation (if any).
1.3.15 re-levelling
operation, after the lift has stopped, to permit the stopping position to be corrected during loading or unloading.
1.3.16 rescue operations
specific actions required to safely release persons entrapped in the car and well by competent persons.
1.3.17 safety circuit
circuit containing contacts and/or electronic components which is regarded to fulfill demands of an electric safety device.
1.3.18 safety gear
mechanical device for stopping in the down direction, and maintaining stationary on the guide rails, the lift car, counterweight or balancing weight in case of overspeeding or breaking of the suspension.
1.3.19 safety rope
auxiliary rope attached to the car, the counterweight or balancing weight for the purpose of tripping a safety gear in case of suspension failure.
1.3.20 travelling cable
flexible electric cable containing multiple cores between the car and a fixed point.
1.3.21 stopping accuracy
vertical distance between car sill and landing sill at the moment when a car is stopped by the control system at its destination floor and the doors reach their fully open position.
1.3.22 unlocking zone
zone, extending above and below the landing level, in which the car floor has to be to enable the corresponding landing door to be unlocked.
1.3.23 well
space in which the car, the counterweight or the balancing weight travels. This space is usually bounded by the bottom of the pit, the walls and the ceiling of the well.
2.1. Well, machinery spaces and pulley rooms
2.1.1 General provisions
2.1.1.1 All lift equipment shall be located in the well or in machinery spaces or pulley rooms.
2.1.1.2 The well, machine and pulley rooms shall not be used for purposes other than lifts. They shall not contain ducts, cables or devices other than for the lift.
The lift well, machine and pulley rooms may, however, contain:
a) equipment for air-conditioning or heating of these spaces, excluding steam heating and high pressure water heating. However, any control and adjustment devices of the heating apparatus shall be located outside the well.
b) fire detectors or extinguishers, with a high operating temperature (e.g. above 80° C), appropriate for the electrical equipment and suitably protected against accidental impact.
2.1.1.3 In the case of partially enclosed lift wells, the well is regarded as the area:
2.1.1.3.1 inside the enclosure where enclosures are present;
2.1.1.3.2 being within a horizontal distance of 1,50 m from movable components of the lift, where enclosures are missing.
2.1.1.4 The well, machinery spaces and pulley rooms shall not be used to provide ventilation of rooms other than those belonging to the lift. Ventilation shall be such that the motors and equipment, as well as electric cables, etc., are protected from dust, harmful fumes and humidity.
2.1.1.5 The well shall be provided with permanently installed electric lighting, giving the following intensity of illumination:
2.1.1.5.1 at least 50 lux, 1,0 m above the car roof within its vertical projection;
2.1.1.5.2 at least 50 lux, 1,0 m above the pit floor everywhere a person can stand, work and/or move between the working areas;
2.1.1.5.3 at least 20 lux outside of the locations defined in a) and b), excluding shadows created by car or components.
2.1.1.5 Machinery spaces and pulley rooms shall be provided with permanently installed electric lighting with an intensity of at least 200 lux at floor level everywhere a person needs to work and 50 lux at floor level to move between working areas.
2.1.1.6 There shall be in the pit:
2.1.1.6.1 stopping device(s) visible and accessible on opening the door(s) to the pit, and from the pit floor;
2.1.1.6.2 a socket outlet;
2.1.1.6.3 means to switch the well lighting.
2.1.1.7 There shall be in machinery spaces and pulley rooms:
2.1.1.7.1 a switch used to control the lighting of the areas and spaces;
2.1.1.7.2 at least one socket outlet;
2.1.1.7.3 a stopping device.
2.1.1.8 If no means to escape are provided for person(s) trapped in the well, alarm initiation devices to the alarm system shall be installed at places where the risk of trapping exists, operable from the refuge space(s).
2.1.1.9 One or more suspension point(s) with the indication of the safe working load, as appropriate, shall be provided in the machinery spaces and where necessary, at the top of the well, conveniently positioned to permit the hoisting of heavy equipment to facilitate the installation and maintenance of the lift.
2.1.1.10 The structure of the well, machinery spaces and pulley rooms shall conform to construction regulations and be able to support at least the loads which may be applied by the machine, by the guide rails at the moment of safety gear operation, in the case of eccentric load in the car, by the action of the buffers, by those which may be applied by the anti-rebound device, by loading and unloading the car, etc.
2.1.1.11 The walls of the well shall have a mechanical strength such that when a force of 1000 N, being evenly distributed over an area of 0,30 m x 0,30 m in round or square section, is applied at right angles to the wall at any point on either face they shall resist without:
2.1.1.11.1 permanent deformation greater than 1 mm;
2.1.1.11.2 elastic deformation greater than 15 mm.
2.1.1.12 The floor of the pit shall be able to support beneath each guide rail, except hanging guide rails, the force due to the mass of the guide rails plus any load due to components fixed or linked to the guide(s) and/or any additional reaction (N) occurring during emergency stopping (e.g. load on traction sheave due to rebound when machine on rails), plus the reaction at the moment of operation of the safety gear and any push through force exerted by the guide rails clips.
2.1.1.13 The floor of the pit shall be able to support beneath the car buffer supports four times the static load being imposed by the mass of the fully loaded car.
2.1.1.14 The floor of the pit shall be able to support beneath the counterweight buffer supports, four times the static load being imposed by the mass of the counterweight, evenly distributed between the total number of counterweight buffers.
2.1.1.15 For hydraulic lifts the floor of the pit shall be able to support beneath each jack the loads and forces imposed to it.
2.1.1.16 Surfaces of walls, floors and ceilings of wells, machine and pulley rooms shall be in durable material not favouring the creation of dust e.g. concrete, brick or blockwork. The surface of the floor where a person needs to work or to move between working areas shall be of non-slip material. The floor of working areas shall be approximately level, except for any buffer and guide rail bases and water drainage devices.
After the building-in of guide rail fixings, buffers, any grids, etc., the pit shall be impervious to infiltration of water.
For hydraulic lifts the space in which the power unit is situated and the pit shall be designed in such a way that it is impervious, so that all the fluid contained in the machinery placed in these areas will be retained if it leaks out or escapes.
2.1.2. Access to well and to machinery spaces and pulley rooms
2.1.2.1 The well, machinery spaces and pulley rooms and the associated working areas shall be accessible.
2.1.1.5 The access way adjacent to any door/trap giving access to the well or to machinery spaces and pulley rooms shall be lit by a permanently installed electric lighting with an intensity of at least 50 lux.
2.1.2.3 A means to enter the pit shall be provided consisting of either an access door or a ladder inside the well, easily accessible from the landing door.
Access doors or ladder should be equipped with an electric safety device(s) to prevent unexpected operations affecting persons while using the ladder or affecting the safety of the lift.
If the ladder is stored on the pit floor, all pit refuge spaces shall be maintained when the ladder is in its stored position.
2.1.2.4. A safe access for persons to machinery spaces and pulley rooms shall be provided. For preference this should be effected entirely by way of stairs. If it is not possible to install stairs, ladders satisfying the following requirements shall be used:
2.1.2.4.1 the access to the machinery spaces and pulley rooms shall not be situated more than 4 m above the level accessible by stairs.
For access over 3 m in height by ladder fall protection shall be provided;
2.1.2.4.2 Ladders shall be fastened to the access permanently or at least by rope or chain in such a way that they cannot be removed;
2.1.2.4.3 Ladders exceeding 1,50 m in height shall, when in position for access, form an angle between 65° and 75° to the horizontal and shall not be liable to slip or turn over;
2.1.2.4.4 The clear width of the ladder shall be at least 0,35 m, the depth of the steps shall not be less than 25 mm and in the case of vertical ladders the distance between the steps and the wall behind the ladder shall not be less than 0,15 m. The steps shall be designed for a load not less than 1500 N;
2.1.2.4.5 Adjacent to the top end of the ladder there shall be at least one hand hold within easy reach;
2.1.2.5.6 Around a ladder, within a horizontal distance of 1,50 m, the risk of falling by more than the height of the ladder shall be prevented.
2.1.3 Access and emergency doors - Access trap doors - Inspection doors
2.1.3.1 When the distance between consecutive landing door sills exceeds 11 m, there shall be intermediate emergency doors or adjacent cars each fitted with an emergency door.
2.1.3.2 Access and emergency doors, access trap doors and inspection doors shall have the following dimensions:
2.1.3.2.1 access doors to machine rooms and access doors to the well shall have a minimum height of 2,0 m and a minimum width of 0,60 m;
2.1.3.2.2 access doors to pulley rooms shall have a minimum height of 1,40 m and a minimum width of 0,60 m;
2.1.3.2.3 access trap doors for persons to machine and pulley rooms shall give a clear passage of at least 0,80 m x 0,80 m, and shall be counterbalanced;
2.1.3.2.4 emergency doors shall have a minimum height of 1,80 m and a minimum width of 0,50 m;
2.1.3.2.5 inspection doors shall have a maximum height of 0,50 m and a maximum width of 0,50 m and shall have sufficient dimensions to carry out the required work through the door.
2.1.3.3 Access and emergency doors and inspection doors shall:
2.1.3.3.1. not open towards the inside of the well or machine or pulley room;
2.1.3.3.2 be provided with a key-operated lock, capable of being reclosed and relocked without a key;
2.1.3.3.3. be capable of being opened from inside the well, machine or pulley room without a key, even when locked;
2.1.3.3.4 be provided with an electric safety device, checking the closed position;
An electric safety device is not required in the case of access door(s) to machine and pulley rooms and in the case of access door(s) to the pit, if the pit door(s) does not give access to a hazardous zone.
2.1.3.3.5 be imperforate, satisfy the same requirements for mechanical strength as the landing doors, and comply with the regulations relevant to the fire protection for the building concerned;
2.1.3.3.6 have a mechanical strength such that when a force of 1000 N, being evenly distributed over an area of 0,30 m x 0,30 m in round or square section, is applied at right angles at any point from outside the well, it shall resist without elastic deformation greater than 15 mm.
2.1.3.3.7 Access trap doors, when they are closed, shall be able to support 2000 N on an area of 0,20 m x 0,20 m at any position.
Trap doors shall not open downwards. Hinges, if any, shall be of a type which cannot be unhooked. Trap doors used only for access of material may be locked from the inside only.
2.1.3.4 A notice bearing the following minimum inscription “Thiết bị thang máy - Nguy hiểm - Không phận sự miễn vào” (“Lift machinery - Danger - Acess forbidden to authorized persons”) shall be fixed to the outside of doors or trap-doors (excluding landing doors and doors of emergency and test panels) giving access to machine and pulley rooms. In the case of trap-doors, a permanently visible notice shall indicate to those using the trap-door: “Đề phòng rơi ngã - Đóng cửa sập lại” (“Danger of falling - Reclose the trap-door”).
2.1.3.5 Outside of the well, near the access doors and emergency doors, if any, there shall be a notice stating: “Giếng thang - Nguy hiểm - Không phận sự cấm vào” (“Lift well – Danger – Access forbidden to authorized persons”).
2.1.4. Well
2.1.4.1. The well may contain one or more lift cars.
2.1.4.2 The counterweight or the balancing weight of a lift shall be in the same well as the car.
2.1.4.3 For hydraulic lifts jacks shall be in the same well as the car. They may extend into the ground or other spaces.
2.1.4.4 A lift shall be separated from the surroundings by:
2.1.4.4.1 walls, floor and ceiling;
2.1.4.4.2 or sufficient space.
2.1.4.5 5.2.5.2.2.1 The well shall be totally enclosed by imperforate walls, floor and ceiling. The only permissible openings are:
2.1.4.5.1 openings for landing doors;
2.1.4.5.2 openings for access and emergency doors to the well and inspection doors;
2.1.4.5.3 vent openings for escape of gases and smoke in the event of fire;
2.1.4.5.4 ventilation openings;
2.1.4.5.5 necessary openings for the functioning of the lift between the well and the machine or pulley rooms.
2.1.4.5.6 Any horizontal projection from a wall into the well or horizontal beam greater than 0,15 m width, including separator beams, shall be protected from a person standing there, unless access is prevented by a car top balustrade.
2.1.4.6 Partially enclosed well
Where the well is required to be partially enclosed, e.g. observation lifts in connection with galleries or atriums, tower buildings, etc., the following apply:
2.1.4.6.1 the height of the enclosure at places normally accessible to persons shall be sufficient to prevent such persons being endangered by moving parts of the lift; and interfering with the safe operation of the lift by reaching lift equipment within the well either directly or with hand-held objects;
2.1.4.6.2 the height must be:
- minimum 3,50 m at a landing door side;
- minimum 2,50 m at other sides and with a minimum horizontal distance of 0,50 m to moving parts of the lift.
If the distance to moving parts exceeds 0,50 m, the value of 2,50 m can be reduced progressively to a minimum height of 1,10 m in a distance of 2,0 m.
2.1.4.6.3 the enclosure shall be imperforate;
2.1.4.6.4 the enclosure shall be located within 0,15 m maximum of the edges of floors, stairs or platforms;
2.1.4.6.5 provisions shall be taken to prevent the interference with the operation of the lift by other equipment;
2.1.4.6.6 special precautions shall be taken for lifts exposed to weather.
2.1.4.7 The horizontal distance between the inner surface of the well and the sill, door frame of the car or closing edge of car sliding doors shall not exceed 0,15 m. The distance given above may be extended to 0,20 m over a height not exceeding 0,50 m or may be extended to 0,20 m throughout the travel on goods passenger lifts in which the landing doors are vertically sliding or is not limited if the car is provided with a mechanically locked door.
2.1.4.8 Below each landing door sill the wall of the well shall comply with the following requirements:
2.1.4.8.1 it shall form a vertical surface which is directly connected to the landing door sill, whose height is at least half the unlocking zone plus 50 mm and whose width is at least the clear opening of the car access plus 25 mm on both sides;
2.1.4.8.2 this surface shall be continuous and be composed of smooth and hard elements, such as metal sheets, and shall be capable of withstanding a force of 300 N applied at a right angle to the wall at any point, being evenly distributed over an area of 5 cm2 in round or square section, it shall resist without permanent deformation or without elastic deformation greater than 15 mm:
2.1.4.8.3 any projections shall not exceed 5 mm. Projections exceeding 2 mm shall be chamfered at least 75° to the horizontal.
2.1.4.9 If accessible spaces do exist below the well, the base of the pit shall be designed for an imposed load of at least 5 000 N/m², and the counterweight or the balancing weight shall be equipped with safety gear.
2.1.4.10 When the car is at its highest position, at least one clear area where a refuge space can be accommodated shall be provided on the car roof, selected from Table 1.
If more than one person is necessary on the car roof for carrying out inspection and maintenance work, an additional refuge space shall be provided for each additional person.
In the case of more than one refuge space they shall be of the same type and not interfering with each other.
A sign on the car roof readable from the landings giving access to the car roof shall clearly indicate the allowed number of persons and the type of posture (Table 1) considered for the refuge space(s) accommodation
Where a counterweight is used a sign shall be placed on or near the counterweight screen stating the maximum allowed clearances between the counterweight and the counterweight buffer when the car is at its upmost landing level in order to maintain the car headroom dimensions.
Table 1- Dimensions of refuge spaces in headroom
|
Type |
Posture |
Pictogram |
Horizontal dimensions of the refuge space (m x m) |
Height of the refuge space (m) |
|
1 |
Upright |
|
0,40 x 0,50 |
2,00 |
|
2 |
Crouching |
|
0,50 x 0,70 |
1,00 |
|
Key for pictograms (1) Black colour (2) Yellow colour (3) Black colour |
||||
2.1.4.11 When the car is at its lowest position at least one clear area where a refuge space can be accommodated shall be provided on the pit floor, selected from Table 2.
If more than one person is necessary in the pit to carry out inspection and maintenance work, an additional refuge space shall be provided for each additional person.
In the case of more than one refuge space they shall be of the same type and not interfering with each other.
A sign in the pit readable from the entrance(s) shall clearly indicate the allowed number of persons and the type of posture (Table 2) considered for the refuge spaces(s) accommodation.
Table 2- Dimensions of refuge spaces in the pit
|
Type |
Posture |
Pictogram |
Horizontal dimensions of the refuge space (m x m) |
Height of the refuge space (m) |
|
|
Upright |
|
0,40 x 0,50 |
2,00 |
|
2 |
Crouching |
|
0,50 x 0,70 |
1,00 |
|
3 |
Laying |
|
0,70 x 1,00 |
0,50 |
|
Key for pictograms (1) Black colour (2) Yellow colour (3) Black colour |
||||
2.1.4.12 If more than one person is necessary on the car roof when the car is at its highest position or is below the pit when the car is at its lowest position for carrying out inspection and maintenance work, an additional refuge space shall be provided for each additional person. In the case of more than one refuge space they shall be of the same type and not interfering with each other.
2.1.5. Machinery spaces and pulley rooms
2.1.5.1 The spaces and the associated working areas for maintenance/inspection work and emergency operation shall be suitably protected against environmental influences.
2.1.5.2 Notices shall be provided to permit easy identification of the main switch(es) and the light switch(es).
2.1.5.3 If, after release of a main switch, some parts remain live (interconnection between lifts, lighting, etc.) notice(s) shall indicate this.
2.1.5.4 In the machine room, the machinery cabinet or at the emergency and tests panel(s), there shall be detailed instructions to be followed in the event of lift breakdown, particularly concerning the use of the device for rescue operations and the emergency unlocking key for landing doors.
2.1.5.5 The traction sheave may be installed in the well, provided that the examinations and the tests and the maintenance operations are able to be carried out from the machine room or the openings between the machine room and the well are as small as possible.
2.1.5.6 The dimensions of machine rooms shall be sufficient to permit easy and safe working on equipment.
2.1.5.7 The dimension of holes in the slab and room floor shall be reduced to a minimum for their purpose. With the aim of removing the danger of objects falling through openings situated above the well, including those for electric cables, ferrules shall be used, which project at least 50 mm above the slab or finished floor.
2.1.5.8 In the case of wells partially enclosed at the exterior of buildings the machinery shall be suitably protected against environmental influences.
2.1.5.9 A clear notice(s) giving all the necessary instructions for operation shall be affixed at an appropriate place(s) in the well.
2.1.5.10 The dimensions of working areas at the machinery shall be sufficient to permit easy and safe working on equipment.
2.1.5.11 If inspection doors are located in the walls of the car, they shall not open towards the outside of the car, be provided with a key-operated lock, capable of being reclosed and relocked without a key and be provided with an electric safety device, checking the locked position.
2.1.5.12 Where it is necessary to move the car from inside with an open inspection door, this inspection control station shall be accessible only to authorized persons e.g. by placing it behind the inspection door and so arranged that it is not possible to use it to drive the car when standing on the car roof.
2.1.5.13 The necessary devices for emergency operation and for dynamic tests shall be arranged so that they can be carried out from outside of the well.
2.1.5.14 Where machinery is to be maintained or inspected from a platform, it shall be permanently installed; and retractable if it is in the travel path of the car or counterweight/balancing weight.
2.1.5.15 The platform shall be able to support at any position the mass of two persons, each counting for 1000 N over an area of 0,20 m × 0,20 m without permanent deformation. If the platform is intended to be used for handling heavy equipment the dimensions shall be considered accordingly and the platform shall have a mechanical strength to withstand the loads and forces to which it is intended to be subjected. The maximum permissible load shall be indicated on the platform. In addition, the platform shall be provided with a balustrade and equipped with means ensuring that:
2.1.5.15.1 the step rise between the floor of the platform and the level of the access does not exceed 0,50 m;
2.1.5.15.2 it shall not be possible to pass a ball with a diameter of 0,15 m through any gap between the platform and the sill of the access door.
2.1.5.16 When the machinery is in the well and is intended to be maintained/inspected from outside of the well, working areas may be provided outside of the well. Access to this equipment shall only be possible by an inspection door.
2.1.5.17 The machinery cabinet shall consist of imperforate walls, floor, roof and door(s). The only permissible openings are:
2.1.5.17.1 ventilation openings;
2.1.5.17.2 necessary openings for the functioning of the lift between the well and the machine or pulley rooms;
2.1.5.17.3 vent openings for escape of gases and smoke in the event of fire.
2.1.5.18 The door(s) shall have sufficient dimensions to carry out the required work through the open door, not open towards the inside of the cabinet and be provided with a key-operated lock, capable of being reclosed and relocked without a key.
2.1.5.19 The dimensions of holes in the slab and pulley room floor shall be reduced to a minimum for their purpose.
2.2. Landing doors and car doors
2.2.1 The openings in the well giving normal access to the car shall be provided with landing doors and the access to the car shall be through a car door.
2.2.2 The doors shall be imperforate.
2.2.3 The landing and car doors when closed shall, apart from the necessary clearances, completely close the landing and car entrances.
2.2.4 In the case of hinged car doors, they shall strike stops to prevent them swinging outside the car.
2.2.5 Landing doors and car doors shall be such that a minimum clear height of the entrance is 2 m.
2.2.6 The clear entrance of the landing doors shall not extend more than 50 mm in width beyond the clear car entrance on both sides.
2.2.7 Every landing and car entrance shall incorporate a sill of sufficient strength to withstand the passage of loads being introduced into the car. A slight counter slope provided in front of each landing sill will help to avoid water from washing, sprinklers, etc., draining into the well.
2.2.8 Landing and car doors shall be designed to prevent, during normal operation, derailment, mechanical jamming, or displacement. Horizontally sliding landing and car doors shall be guided top and bottom and vertically sliding landing and car doors shall be guided at both sides.
2.2.9 Suspension of vertically sliding doors shall satisfy the following requirements:
2.2.9.1 Panels of vertically sliding landing and car doors shall be fixed to two independent suspension elements;
2.2.9.2 Suspension ropes, chains, belts shall be designed with a safety factor of at least 8;
2.2.9.3 The pitch diameter of suspension rope pulleys shall be at least 25 times the rope diameter;
2.2.9.4 Suspension ropes and chains shall be guarded against leaving the pulley grooves or sprockets.
2.2.10 The horizontal distance between the sill of the car and sill of the landing doors shall not exceed 35 mm.
2.2.11 The horizontal distance giving access to the well between the leading edges of the car door and the landing doors during the whole of their normal operation shall not exceed 0,12 m. Where additional building doors are added in front of the landing door the trapping of persons in the space between should be avoided.
2.2.12 In the case of the combination of a hinged landing door and a folding car door or a hinged landing door and a horizontal sliding car door or horizontal sliding car and landing doors, which are not mechanically coupled, it shall not be possible to place a ball with a diameter of 0,15 m in any gap between the closed doors.
2.2.13 Components of landings and car doors shall be made of material that maintains the strength property over their intended lifetime under the environmental condition and comply with the regulations relevant to the fire protection for the building concerned.
2.2.14. Mechanical strength
2.2.14.1 Complete landing doors, with their locks, and car doors shall have a mechanical strength such that in the locked position of landing doors and closed position of car doors:
2.2.14.1.1 when a static force of 300 N, being evenly distributed over an area of 5 cm² in round or square section, is applied at right angles to the panel/frame at any point on either face they shall resist without permanent deformation greater than 1 mm and elastic deformation greater than 15 mm;
After such a test the safety function of the door shall not be affected.
2.2.14.1.2 when a static force of 1000 N, being evenly distributed over an area of 100 cm² in round or square section, is applied at right angles at any point of the panel or frame from the landing side for landing doors or from the inside of the car for car doors they shall resist without significant permanent deformation affecting functionality and safety.2
2.2.14.2 Under the application of a manual force of 150 N in the direction of the opening of the leading landing door panel(s) of horizontally sliding doors and folding doors, at the most unfavourable point, the clearances may exceed 6 mm, but they shall not exceed 30 mm for side opening doors or 45 mm in total for centre opening doors.
2.2.15 In addition for landing doors with glass panels, car doors with glass panels, and side frames of landing doors that are wider than 160 mm, the following shall be fulfilled:
2.2.15.1 when an impact energy equivalent to a falling height of 800 mm of the soft pendulum shock device is striking the glass panels or side frames in the middle of the panel or frame width, at striking points, from the landing side or from the inside of the car, there shall be no loss of integrity of the door assembly. The door assembly shall remain in place with no gaps greater than 0,12 m into the well and for glass elements, there shall be no cracks;
2.2.15.2 when an impact energy equivalent to a falling height of 500 mm of the hard pendulum shock device is applied on glass panels, striking in the middle of the door panels or glass panels in frames at striking points from the landing side or from the inside of the car, there shall be no cracks and no damage on the surface of the glass except chips of 2 mm maximum in diameter.
2.2.16 The doors and their surrounds shall be designed in such a way as to minimize risk of damage or injury due to jamming of a part of the person, clothing or other object. To avoid the risk of shearing during operation, the face of automatic power operated sliding doors, from the landing and from inside the car shall not have recesses or projections exceeding 3 mm. Edges of these shall be chamfered in the opening direction of movement. Exception to these requirements is also made for the access to the unlocking triangle.
2.2.17 Regarding an automatic power operated door, a protective device shall automatically initiate re-opening of the door(s) in the event of a person crossing the entrance during the closing movement. The protective device may be rendered inoperative in the last 20 mm of door closing gap.
The protective device (e.g. light curtain) shall cover the opening over the distance between at least 25 mm and 1600 mm above the car door sill. The protective device shall be capable of detecting obstacles minimum of 50 mm diameter. To counteract persistent obstructions when closing the door, the protective device may be de-activated after a predetermined time.
2.2.18 Regarding a non-automatic power operated door, when the closing of the door is carried out under the continuous control and supervision of the user, by continuous pressure on a button or similar (hold-to-run control), the average closing speed of the fastest panel shall be limited to 0,30 m/s, when the kinetic energy, calculated or measured, exceeds 10 J.
2.2.19 Regarding a vertically sliding door, power closing shall only be used if the following five conditions are fulfilled at the same time:
2.2.19.1 the closing is carried out under the continuous control and supervision of the users, e.g. hold-to-run operation;
2.2.19.2 the average closing speed of the panels is limited to 0,30 m/s;
2.2.19.3 the car door is at least two-thirds closed before the landing door begins to close;
2.2.19.4 the door mechanism shall be protected against unintentional access.
2.2.20 When using other types of doors, e.g. hinged doors, with power operation, where there is a risk when opening or closing, of striking persons, precautions similar to those laid down for power operated sliding doors shall be taken.
2.2.21 The natural or artificial lighting of the landings in the vicinity of landing doors shall be at least 50 lux at floor level, such that a user can see ahead when they are opening the landing door to enter the lift, even if the car light has failed.
2.2.22 In the case of landing doors with manual opening, the user needs to know whether the car is there or not. To this effect, one or more transparent vision panels shall be installed or an illuminated “car here” signal which shall light up when the car is about to stop or has stopped at the particular landing. This signal may be switched off when the car is parked and the doors are closed, but shall light again when the call button of the landing where the car is parked is activated.
2.2.23 Protection against the risk of falling
It shall not be possible in normal operation to open a landing door (or any of the panels in the case of a multi-panel door) unless the car has stopped, or is on the point of stopping, in the unlocking zone of that door.
The unlocking zone shall not extend more than 0,20 m above and below the landing level.
In the case, however, of mechanically operated car and landing doors operating simultaneously, the unlocking zone may extend to a maximum of 0,35 m above and below the landing level.
2.2.24 For protection against shearing, it shall not be possible to start the lift nor keep it in motion if a car door (or any of the panels in the case of a multi-panel door) is open, except for some special cases during levelling, re-levelling and maintenance and use of landing and car door bypass devices as specified in TCVN 6396-20).
2.2.25 Each landing door shall be provided with a locking device satisfying the conditions of 5.3.9.1 of TCVN 6396-20 and 2.2.23 of this regulation.
2.2.26 Emergency unlocking of landing doors
Each of the landing doors shall be capable of being unlocked from the outside with the aid of an emergency unlocking key, which will fit the unlocking triangle depending on the structure specified by each lift manufacturer.
The position of unlocking triangle can be on the door panel or frame. When in a vertical plane, on the door panel or frame, the position of the unlocking triangle shall not exceed 2,00 m in height above the landing.
After an emergency unlocking, the locking device shall not be able to remain in the unlocked position with the landing door closed.
2.2.27 If the lift stops for any reason in the unlocking zone, it shall be possible with a force not greater than 300 N, to open the car and landing door by hand from:
2.2.27.1 the landing after the landing door has been unlocked with the emergency unlocking key or being unlocked by the car door;
2.2.27.2 within the car.
2.2.28 In order to restrict the opening of the car door by persons inside the car a means shall be provided such that when the car is moving the opening of the car door shall require a force of more than 50 N.
2.3. Car, counterweight and balancing weight
2.3.1 Landing doors and car doors shall be such that a minimum clear height of the entrance is 2 m.
2.3.2 To prevent overloading of the car by persons, the available area of the car shall be limited. To this effect the relationship between rated load and maximum available area is given in Table 3 hereof.
2.3.3 For goods passenger lifts, hydraulically driven, the available area of the car may be greater than the value determined from Table 3, but shall not exceed the value determined from Table 4 for the corresponding rated load.
Table 3 - Rated load and maximum available car area
|
Rated load, mass (kg) |
Maximum available car area (m2) |
Rated load, mass (kg) |
Maximum available car area (m2) |
|
100 |
0,37 |
900 |
2,20 |
|
180 |
0,58 |
975 |
2,35 |
|
225 |
0,70 |
1000 |
2,40 |
|
300 |
0,90 |
1050 |
2,50 |
|
375 |
1,10 |
1125 |
2,65 |
|
400 |
1,17 |
1200 |
2,80 |
|
450 |
1,30 |
1250 |
2,90 |
|
525 |
1,45 |
1275 |
2,95 |
|
600 |
1,60 |
1350 |
3,10 |
|
630 |
1,66 |
1425 |
3,25 |
|
675 |
1,75 |
1500 |
3,40 |
|
750 |
1,90 |
1600 |
3,56 |
|
800 |
2,00 |
2000 |
4,20 |
|
825 |
2,05 |
2500c |
5,00 |
|
- Beyond 2500 kg, add 0,16 m2 for each 100 kg extra. - For intermediate loads, the area is determined by linear interpolation. |
|||
Table 4 - Rated load and maximum available car area (for hydraulic goods passenger lifts)
|
Rated load, mass (kg) |
Maximum available car area (m2) |
Rated load, mass (kg) |
Maximum available car area (m2) |
|
400 |
1,68 |
975 |
3,52 |
|
450 |
1,84 |
1000 |
3,60 |
|
525 |
2,08 |
1050 |
3,72 |
|
600 |
2,32 |
1125 |
3,90 |
|
630 |
2,42 |
1200 |
4,08 |
|
675 |
2,56 |
1250 |
4,20 |
|
750 |
2,80 |
1275 |
4,26 |
|
800 |
2,96 |
1350 |
4,44 |
|
825 |
3,04 |
1425 |
4,62 |
|
900 |
3,28 |
1500 |
4,80 |
|
|
|
1600a) |
5,04 |
|
- Beyond 2500 kg, add 0,40 m2 for each 100 kg extra. - For intermediate loads, the area is determined by linear interpolation. |
|||
2.3.4 For goods passenger lifts, the weight of handling devices are included in the rated load or the weight of handling devices shall be considered separately from the rated load under the following conditions:
2.3.4.1 handling devices are used only for loading and unloading of the car and are not intended to be transported with the load;
2.3.4.2 for traction and positive drive lifts the design of the car, the car sling, the car safety gear, the guide rails, the machine brake, the traction and the unintended car movement protection means shall be based on the total load of rated load plus weight of handling devices;
2.3.4.3 for hydraulic lifts the design of the car, the car sling, the connection between the car and the ram (cylinder), the car safety gear, the rupture valve, the restrictor/one-way restrictor, the pawl device, the guide rails and the unintended movements protection means shall be based on the total load of rated load plus weight of handling devices;
2.3.4.4 if the stroke of the car due to loading and un-loading exceeds the maximum levelling accuracy, a mechanical device shall limit down movements of the car which complies with the following:
2.3.4.4.1 the levelling accuracy shall not exceed 20 mm;
2.3.4.4.2 the mechanical device shall be activated before the doors open;
2.3.4.4.3 the mechanical device shall have a sufficient strength to hold the car even if the machine brake is not engaged or the down valve on a hydraulic lift is opened;
2.3.4.4.4 re-levelling movements shall be prevented by an electric safety device if the mechanical device is not in the active position;
2.3.4.4.5 normal operation of the lift shall be prevented by an electric safety device if the mechanical device is not in the inactive position.
2.3.5 In the car the following shall be displayed:
2.3.5.1 the manufacturer's name;
2.3.5.2 the rated load of the lift (in kilograms);
2.3.5.3 the number of persons;
2.3.5.4 the instruction manual, and instructions to be followed in the event of lift breakdown.
2.3.5.5 contact phone number of person responsible for lift operations specified in 3.4.4 of this Regulation.
2.3.6 The car shall be completely enclosed by walls, floor and roof, the only permissible openings being as follows:
2.3.6.1 entrances for the normal access of users;
2.3.6.2 emergency trap doors and doors;
2.3.6.3 ventilation apertures.
2.3.7 The assembly comprising the sling, guide shoes, walls, floor, ceiling and roof of the car shall have mechanical strength to resist the forces which will be applied in normal lift operation and the operation of safety devices.
2.3.8 Each wall of the car shall have a mechanical strength such that:
2.3.8.1 when a force of 300 N, being evenly distributed over an area of 5 cm² in round or square section, is applied at right angles to the wall at any point from the inside of the car towards the outside, it shall resist without any permanent deformation greater than 1 mm and elastic deformation greater than 15 mm.
2.3.8.2 when a force of 1000 N, being evenly distributed over an area of 100 cm² in round or square section, is applied at right angles to the wall at any point from the inside of the car towards the outside it shall resist without permanent deformation greater than 1 mm.3
2.3.9 Each car sill shall be fitted with an apron, which extends at least to the full width of the clear landing entrance, which it faces. This vertical section shall be extended downwards by a chamfer whose angle with the horizontal plane shall be at least 60°. The projection of this chamfer of the horizontal plane shall be not less than 20 mm.
Any projections on the face of the apron, such as fixings, shall not exceed 5 mm. Projections exceeding 2 mm shall be chamfered at least 75° to the horizontal.
2.3.10 Emergency trap doors and emergency doors
2.3.10.1 Where an emergency trap door is fitted to the car roof, it shall have minimum clear opening dimensions of 0,40 m × 0,50 m.
2.3.10.2 Emergency doors may be used in the case of adjacent cars, provided, however, that the horizontal distance between cars does not exceed 1 m.
In this case, each car shall be provided with a means of determining the position of the adjacent car to which persons will be rescued in order to allow it to be brought to a level where rescue can take place.
2.3.11 The car roof shall have sufficient strength to support the maximum number of persons and be provided with a toe board a minimum of 0,10 m high. Where the free distance in a horizontal plane, beyond and perpendicular to the outer edge of the car roof to the wall of the well exceeds 0,30 m, a balustrade shall be provided.
2.3.12 The following shall be installed on top of the car: control device, stopping device and socket outlet.
2.3.13 Cars shall be provided with ventilation apertures in the upper and lower parts of the car.
2.3.14 The car shall be provided with electrical lighting that is permanently installed ensuring a light intensity of at least 100 lux on the control devices and at 1 m above the floor at any point not less than 100 mm from any wall. The car shall be continuously illuminated except when the car is parked and the doors are closed.4
The light meter should be oriented towards the strongest light source when taking lux level readings.
2.3.15 There shall be emergency lights with an automatically rechargeable emergency supply, which is capable of ensuring a lighting intensity of at least 5 lux for 1 h:
2.3.15.1 at each alarm initiation device in the car and on the car roof;
2.3.15.2 in the centre of the car 1 m above the floor;
2.3.15.3 in the centre of the car roof, 1 m above the floor.
This lighting shall come on automatically upon failure of the normal lighting supply.
2.3.16 If the counterweight or the balancing weight incorporates filler weights, necessary measures shall be taken to prevent their displacement. To this effect they shall be mounted in a frame and secured within the frame.
2.4. Suspension means, compensation means and related protection means
2.4.1 Cars, counterweights or balancing weights shall be suspended from steel wire ropes, or steel chains with parallel links or roller chains.
2.4.2 The ropes shall correspond to the following requirements:
2.4.2.1 the nominal diameter of the ropes shall be at least 8 mm.
For other ropes, every lift provider and installation service provider shall prove that the safety factor of ropes satisfies the requirements in 2.4.4 of this Regulation and take legal responsibility for ensuring safety during the operation, inspection and maintenance of the lift and handling of lift breakdowns when using the abovementioned ropes; and at the same time, specify instructions on deadline for rope replacement and signs showing that ropes that are no longer safe in the manual for installation, operation, inspection, maintenance, and breakdown handling.
2.4.2.2 The minimum number of ropes or chains shall be two
2.4.2.3 Ropes or chains shall be independent.
2.4.3 The ratio between the pitch diameter of sheaves, pulleys or drums and the nominal diameter of the suspension ropes shall be at least 40, regardless of the number of strands of the suspension ropes. For other cases, every rope supplier shall provide proof that the durability and lifetime of ropes meet the criteria announced by the manufacturer before their use in the lift.
2.4.4 The safety factor of the suspension means shall not be less than:
- 12 in the case of traction drive with three ropes or more;
- 16 in the case of traction drive with two ropes;
- 12 in the case of drum drive and hydraulic lifts with ropes;
- 10 in the case of chains.
For positive and hydraulic drives the safety factor of balancing weight ropes or chains shall be calculated as above in relation to the rope/chain force due to the weight of the balancing weight.
2.4.5 The junction between the rope and the rope termination shall be able to resist at least 80 % of the minimum breaking load of the rope.
The ends of the ropes shall be fixed to the car, counterweight or balancing weight, or suspension points of the dead parts of reeved ropes by means of self tightening wedge type sockets. The fixing of the ropes on drums shall be carried out using a system of blocking with wedges, or using at least two clamps.
2.4.6 The ends of each chain shall be fixed to the car, counterweight or balancing weight, or suspension points of the dead parts of reeved chains. The junction between the chain and the chain termination shall be able to resist at least 80 % of the minimum breaking load of the chain.
2.4.7 Rope traction shall be such that the following three conditions are fulfilled5:
2.4.7.1 the car shall be maintained at floor level without slip when loaded to 125 %;
2.4.7.2 it shall be ensured that any emergency braking causes the car, whether empty or with rated load, to decelerate to a speed which is lower or equal than the speed for which the buffers are designed, including reduced stroke buffer;
2.4.7.3 it shall not be possible to raise the empty car or the counterweight to a dangerous position if either the car or the counterweight is stalled; either the ropes shall slip on the traction sheave; or the machine shall be stopped by an electric safety device.
2.4.8 Protection in the case of abnormal extension, slack rope or slack chain shall be provided as follows:
2.4.8.1 in the case of two rope or two chain suspension of the car an electric safety device shall cause the machine to stop in case of abnormal relative extension of one rope or chain;
2.4.8.2 for positive drive lifts and hydraulic lifts, if the risk of slack rope (or chain) exists, an electric safety device shall cause the machine to stop when slack occurs.
After stopping normal operation shall be prevented.
For hydraulic lifts with two or more jacks this requirement applies for each suspension set.
2.4.9 The devices for adjusting the length of ropes or chains shall be made in such a way that these devices cannot work themselves loose after adjustment.
2.4.10 Compensation for the weight of the suspension ropes in order to ensure adequate traction or hoisting motor power shall be provided in accordance with the following conditions:
2.4.10.1 for rated speeds not exceeding 3,0 m/s, means such as chains, ropes or belts may be used;
2.4.10.2 for rated speeds exceeding 3,0 m/s, compensation ropes shall be provided;
2.4.10.3 for lifts whose rated speed exceeds 3,5 m/s there shall be, in addition, an anti-rebound device;
2.4.10.4 for rated speeds exceeding 1,75 m/s, compensation means without tensioning shall be guided at the vicinity of the loop.
2.4.11 Whenever compensation ropes are used the following shall apply:
2.4.11.1 tensioning pulleys shall be used;
2.4.11.2 the ratio between the pitch diameter of the tensioning pulleys and the nominal diameter of the compensating ropes shall be at least 30;
2.4.11.3 the tension shall be provided by gravity.
2.4.12 Compensation means, e.g. ropes, chains, belts and their terminations, shall be capable of withstanding, with a safety factor of 5, any static forces to which the means is subjected.
The maximum suspended weight of compensation means with car or counterweight at the top of its travel and one-half total weight of tension sheave assembly, where used, shall be included.
2.4.13 For sheaves, pulleys and sprockets, overspeed governors, tension weight pulleys, provisions shall be made to avoid bodily injury or the ropes/chains leaving the pulleys/sprockets, if slack or the introduction of objects between ropes/chains and pulleys/sprockets.
2.4.14 The devices used shall be constructed so that the rotating parts are visible, and do not hinder examination and maintenance operation. The dismantling shall be necessary only in the following cases:
2.4.14.1 replacement of a rope/chain;
2.4.14.2 replacement of a pulley/sprocket;
2.4.14.3 re-cutting of the grooves.
2.4.15 Traction sheaves, pulleys and sprockets may be installed in the well above the lowest landing level under the following conditions:
2.4.15.1 there shall be retaining devices to prevent diverter pulleys/sprockets from falling in the event of a mechanical failure. These devices shall be able to support the weight of the pulley/sprockets and the suspended loads;
2.4.15.2 if traction sheaves, pulleys/sprockets are placed in the vertical projection of the car, then there shall be clearances in the headroom.
2.5. Precautions against free fall, excessive speed
2.5.1 Devices, or combinations of devices and their actuation shall be provided to prevent the car from:
2.5.1.1 free fall;
2.5.1.2 excessive speed, downwards.
2.5.2 For traction and positive drive lifts the protection means according to Table 5 shall be provided.
Table 5 - Protection means for traction and positive drive lifts
|
Hazardous situation |
Protection means |
Tripping means |
|
Free fall and excessive speed in down direction of car |
Safety gear |
Overspeed governor |
|
Free fall of counterweight or balancing weight in the case of 2.1.4.9 |
Safety gear |
Overspeed governor for rated speeds not exceeding 1 m/s - tripping by breakage of suspension means, or - tripping by safety rope |
2.5.3 For hydraulic lifts, devices, or combinations of devices and their actuation, shall be provided in accordance with Table 6 hereof. In addition protection against unintended movement shall be provided.
Table 6 - Protection means for hydraulic lifts
|
|
Type of lifts |
Alternative combinations to be selected |
Precautions against creeping in addition to re-levelling |
||
|
Tripping of safety gear by downward movement of the car |
Pawl device |
Electrical anti-creep system |
|||
|
Precautions against free fall or descent with excessive speed |
Direct acting lifts |
Safety gear tripped by overspeed governor |
X |
X |
X |
|
Rupture valve |
|
X |
X |
||
|
Restrictor |
|
X |
|
||
|
Indirect acting lifts |
Safety gear tripped by overspeed governor |
X |
X |
X |
|
|
Safety gear plus safety gear tripped by breakage of suspension means or by safety rope
|
X |
X |
X |
||
|
Restrictor plus safety gear tripped by breakage of suspension means or by safety rope |
X |
X |
|
||
2.5.4 The safety gear shall be capable of operating in the downward direction and capable of stopping a car carrying the rated load, or a counterweight or balancing weight at, the tripping speed of the overspeed governor, or if the suspension devices break, by gripping the guide rails, and of holding the car, counterweight or balancing weight there.
2.5.5 On safety gears a data plate shall be fixed indicating:
2.5.5.1 the name of the manufacturer of the safety gear;
2.5.5.2 Actuation speed;
2.5.5.3 the type of safety gear;
2.5.5.4 if adjustable the safety gear shall be marked with the permissible load range or the adjustment parameter if the relationship with the load range is specified in the instruction manual.
2.5.6 Car safety gear shall be of the progressive type, or may be of the instantaneous type if the rated speed of the lift does not exceed 0,63 m/s.
For hydraulic lifts instantaneous type safety gears other than of the captive roller type which are not tripped by an overspeed governor shall only be used if the tripping speed of the rupture valve or the maximum speed of the restrictor (or one-way restrictor) does not exceed 0,80 m/s.
2.5.7 If the car or counterweight or balancing weight carries several safety gears they shall all be of the progressive type.
2.5.8 The safety gear of the counterweight or balancing weight specified in 2.1.4.9 of this Regulation shall be of the progressive type if the rated speed exceeds 1 m/s, otherwise the safety gear may be of the instantaneous type.
2.5.9 When the car safety gear is engaged, an electric safety device, mounted on the car shall initiate the stopping of the machine before or at the moment of safety gear operation.
Accidental tripping of the safety gear shall be prevented as far as possible, e.g. by sufficient clearance to guide rails to allow horizontal movements of guide shoes.
Safety gears shall not be tripped by devices, which operate electrically, hydraulically or pneumatically.
When a safety gear is tripped either by the breakage of the suspension means or by a safety rope, it shall be assumed that the safety gear is tripped at a speed corresponding to the tripping speed of an appropriate overspeed governor.
2.5.10 In the case of tripping by overspeed governor, the following shall be satisfied:
2.5.10.1 tripping of the overspeed governor for the safety gear shall occur at a speed at least equal to 115 % of the rated speed and less than:
2.5.10.1.1 0,8 m/s for instantaneous safety gears except for the captive roller type; or
2.5.10.1.2 1 m/s for safety gears of the captive roller type; or
2.5.10.1.3 1,50 m/s for progressive safety gear used for rated speeds not exceeding 1,0 m/s; or
2.5.10.1.4 
, expressed in metres per second, for progressive
safety gear for rated speeds exceeding 1,0 m/s.
2.5.10.2. Overspeed governors using only traction to produce the tripping force shall have grooves which have been submitted to an additional hardening process or have an undercut in accordance with TCVN 6396-50 (EN 81-50).
2.5.10.3 The direction of rotation, corresponding to the operation of the safety gear, shall be marked on the overspeed governor.
2.5.10.4 The tensile force in the overspeed governor rope produced by the governor, when tripped, shall be at least the greater of the following two values: twice that necessary to engage the safety gear or 300 N.
2.5.11 The rope of an overspeed governor shall satisfy the following conditions:
2.5.11.1 the overspeed governor shall be driven by a wire rope.
2.5.11.2 the minimum breaking load of the rope shall be related by a safety factor of at least 8 to the tensile force produced in the rope of the overspeed governor when tripped taking into account a friction factor Pmax equal to 0,2 for traction type overspeed governor.
2.5.11.3 the ratio between the pitch diameter of the pulleys for the overspeed governor rope and the nominal rope diameter shall be at least 30.
2.5.11.4 the overspeed governor rope shall be tensioned by a pulley with a tensioning weight. This pulley or its tensioning weight shall be guided.
2.5.11.5 during the engagement of the safety gear, the overspeed governor rope and its terminations shall remain intact, even in the case of a braking distance greater than normal.
2.5.11.6 the overspeed governor rope shall be easily detachable from the safety gear.
2.5.12 For the accessibility, the overspeed governor shall meet the following conditions:
2.5.12.1 the overspeed governor shall be accessible and reachable for inspection and maintenance;
2.5.12.2 if located in the well the overspeed governor shall be accessible and reachable from outside the well;
2.5.12.3 the above requirement does not apply if the following three conditions are fulfilled:
2.5.12.3.1 the tripping of the overspeed governor is effected by means of a remote control, except cableless, from outside the well whereby an involuntary tripping is not effected and the actuation device is not accessible to unauthorized persons;
2.5.12.3.2 the overspeed governor is accessible for inspection and maintenance from the roof of the car or from the pit;
2.5.12.3.3 the overspeed governor returns after tripping automatically into the normal position, as the car, counterweight or balancing weight is moved in the upward direction.
However the electrical parts may return into the normal position by remote control from the outside of the well which shall not influence the normal function of the overspeed governor.
2.5.13 During checks or tests it shall be possible to operate the safety gear at a lower speed than that indicated by tripping the overspeed governor in a safe way.
If the overspeed governor is adjustable, the final setting shall be sealed in such a way to prevent re- adjustment without breaking the seal.
The overspeed governor or another device shall, by means of an electric safety device, initiate the stopping of the lift machine before the car speed, either up or down, reaches the tripping speed of the governor. If after release of the safety gear the overspeed governor does not automatically reset itself, an electric safety device shall prevent the starting of the lift while the overspeed governor is not in the reset position.
2.5.14 When the safety gear is tripped by the breakage of the suspension means the following applies6:
2.5.14.1 the tensile force exerted by the actuating mechanism shall be at least the greater of the following two values: twice that necessary to engage the safety gear or 300 N.
2.5.14.2 when springs are used for the tripping of the safety gear they shall be of the guided compression type;
2.5.14.3 it shall be possible for a test of the safety gear and its actuating mechanism to be made without the need to enter the well during the test;
Where the means provided is mechanical the force required to operate it shall not exceed 400 N.
After these tests it shall be checked that no distortion or deterioration which could impair the use of the lift has occurred.
2.5.15 When the safety gear is tripped by a safety rope the following applies:
2.5.15.1 the tensile force exerted by the safety rope shall be at least the greater of the following two values: twice that necessary to engage the safety gear or 300 N.
2.5.15.2 the rope shall be tensioned by gravity or by springs that do not affect the safe function if broken;
2.5.15.3 during the engagement of the safety gear, the safety rope and its terminations shall remain intact, even in the case of a braking distance greater than normal;
2.5.15.4 the breakage or slackening of the safety rope shall cause the machine to stop by means of an electric safety device;
2.5.15.5 pulleys used for carrying the safety rope shall be mounted independently of any shaft or pulley assembly that carries the suspension ropes or chains.
2.5.16 Tripping by rope of the safety gear shall be actuated under the following conditions:
2.5.16.1 the rope blocking mechanism shall be released during normal movement of the car;
2.5.16.2 rescue operation shall be possible in all circumstances;
2.5.16.3 an electric device, associated with the rope blocking mechanism shall cause stopping of the machine at latest at the moment of blocking of the rope, and shall prevent any further normal downward movement of the car;
2.5.16.4 precautions shall be taken to avoid involuntary tripping of the safety gear by the rope in case of the disconnection of the electric power supply during a downward movement of the car;
2.5.16.5 the design of the system of rope and rope blocking mechanism shall be such that no damage is possible during the engagement of the safety gear;
2.5.16.6 the design of the system of rope and rope blocking mechanism shall be such that no damage is possible by an upward movement of the car.
2.5.17 Tripping by lever of the safety gear shall be actuated under the following conditions:
2.5.17.1 after the normal stopping of the car, a lever attached to the safety gear shall be extended into a position to engage with fixed stops, which are located at each landing;
2.5.17.2 the lever shall be retracted during the normal movement of the car;
2.5.17.3 the movement of the lever to the extended position shall be effected by guided compression spring(s) and/or by gravity;
2.5.17.4 emergency operation shall be possible in all circumstances;
23.5.17.5 precautions shall be taken to avoid involuntary tripping of the safety gear by the lever, in case of the disconnection of the electric power supply during a downward movement of the car.
2.5.17.6 the design of the lever and stops system shall be such that no damage is possible during the engagement of the safety gear even in the case of longer braking distances or by an upward movement of the car;
2.5.17.7 an electric device shall prevent any normal movement of the car when the tripping lever is not in its extended position after normal stopping and the car doors shall be closed and the lift shall be taken out of operation;
2.5.17.8 an electric safety device shall prevent any normal down movement of the car when the tripping lever is not in the retracted position.
2.5.18 For a hydraulic lift, the rupture valve shall be capable of stopping the car in downward movement, and maintaining it stationary. The rupture valve shall be tripped at the latest when the speed reaches a value equal to rated speed downwards plus 0,30 m/s.
2.5.19 On hydraulic lifts with several jacks, operating in parallel, one common rupture valve may be used. Otherwise the rupture valves shall be interconnected to cause simultaneous closing, in order to avoid the floor of the car from inclining by more than 5 % from its normal position.
2.5.20 There shall be in the machinery space a means which can be manually operated from outside of the well allowing to reach the tripping flow of the rupture valve without overloading the car. The means shall be safeguarded against unintentional operation. It shall not neutralize the safety devices adjacent to the jack.
2.5.21 There shall be in the machinery space a means which can be manually operated from outside of the well allowing to reach the tripping flow of restrictor without overloading the car. The means shall be safeguarded against unintentional operation. In no case shall it neutralize the safety devices adjacent to the jack.
2.5.22 The pawl device shall operate only in the downward direction, and be capable of stopping the car, with a load according to Table 2, and maintaining it stationary on fixed stops.
2.5.23 For each landing supports shall be provided arranged at two levels to prevent the car sinking below the landing level by more than 0,12 m; and to stop the car at the lower end of the unlocking zone.
2.5.24 When several pawls are provided precautions shall be taken to ensure that all pawls engage on their respective supports even in the case of the disconnection of the electrical power supply during a downward movement of the car.
2.5.25 If the pawl device is not in the extended position:
2.5.25.1 an electric device shall prevent the opening of the doors and any normal movement of the car;
2.5.25.2 the pawl device shall be fully retracted and the car shall be sent to the lowest level served by the lift, and
2.5.25.3 the doors shall open to allow persons to leave the car and the lift shall be taken out of operation.
The return to normal operation shall require the intervention of a competent maintenance person.
2.6.1 The car, counterweight or balancing weight shall each be guided by at least two rigid steel guide rails.
2.6.2 Guide rails for counterweights or balancing weights without safety gear may be made of formed metal sheet. They shall be protected against corrosion
2.6.3 The fixing of the guide rails to their brackets and to the building shall permit compensation, either automatically or by simple adjustment, of effects due to normal settling of the building or shrinkage of concrete.
A rotation of the attachments by which the guide rails could be released shall be prevented.
2.6.4 For guide rail fixings containing non-metallic elements the failure of these elements shall be taken into account for calculation of permissible deflections.
2.6.5 The guide rails, their joints and attachments shall withstand the loads and forces imposed on them in order to ensure a safe operation of the lift. The aspects of safe operation of the lift concerning guide rails are:
2.6.5.1 car, counterweight or balancing weight -guidance shall be assured;
2.6.5.2 deflections shall be limited to such an extent, that due to them:
a) unintended unlocking of the doors shall not occur;
b) operation of the safety devices shall not be affected; and
c) collision of moving parts with other parts shall not be possible.
2.6.6 The combination of deflections of guide rails and deflections of brackets, play in the guide shoes and straightness of the guide rails shall be taken into account in order to ensure a safe operation of the lift.
2.7.1 Lifts shall be provided with buffers at the bottom limit of travel of the car and counterweight.
In the case of buffer(s) fixed to the car or the counterweight the impact area(s) of the buffer(s) on the pit floor shall be made obvious by an obstacle(s) of a height not less than 300 mm.
An obstacle is not required for buffer(s) fixed to the counterweight where a screen is extended to not more than 50 mm above the pit floor.
2.7.2 In addition to the requirements of 2.7.1 positive drive lifts shall be provided with buffers on the car top to function at the upper limit of travel.
2.7.3 For hydraulic lifts, when the buffer(s) of a pawl device is (are) used to limit the travel of the car at the bottom, the pedestal is also required unless the fixed stops of the pawl device are mounted on the car guide rails, and the car is not able to pass with pawl(s) retracted.
2.7.4 For hydraulic lifts, when buffers are fully compressed the ram shall not hit the base of the cylinder.
This does not apply to devices ensuring re-synchronisation of telescopic cylinders, where at least one stage shall not hit its down travel mechanical limit.
2.7.5 Hydraulic buffers shall be constructed so that the fluid level may be easily checked.
2.8. Lift machinery and associated equipment
2.8.1 Each lift shall have at least one machine of its own.
2.8.2 Effective protection shall be provided for accessible rotating parts of machinery.
2.8.3 The lift shall be provided with a braking system, which operates automatically in the event of loss of the mains power supply or the supply to control circuits.
2.8.3.1 For an electro-mechanical brake, it on its own shall be capable of stopping the machine when the car is travelling downward at rated speed and with the rated load plus 25 %. In these conditions the average retardation of the car shall not exceed that resulting from operation of the safety gear or stopping on the buffer.
All the mechanical components of the brake which take part in the application of the braking action on the braking surface shall be installed at least in two sets. If one of the brake sets is not working due to failure of a component a sufficient braking effort to decelerate, stop and hold the car, travelling downwards at rated speed and with rated load in the car and upward with empty car shall continue to be exercised.
2.8.3.2 To hold off the brake shall require a continuous flow of current. The following shall be met:
2.8.3.2.1 the interruption of this current, initiated by an electric safety device, shall be made by two independent electromechanical devices, whether or not integral with those, which cause interruption of the current feeding the lift machine;
If, whilst the lift is stationary, one of the electromechanical devices has not opened the brake circuit, any further movement of the car shall be prevented. A stuck-at failure of this monitoring function shall have the same result;
2.8.3.2.2 when the motor of the lift is likely to function as a generator, it shall not be possible for the electric device operating the brake to be fed directly by the motor.
2.8.3.2.3 braking shall become effective without supplementary delay7 after opening of the brake release circuit.
2.8.3.2.4 operation of an overload and/or over current protective device for the electro-mechanical brake shall initiate the simultaneous de-energization of the machine.
2.8.3.2.5 current shall not be applied to the brake until the motor has been powered.
2.8.4 Where a means of emergency operation is required it shall consist of either:
2.8.4.1 a mechanical means where the manual effort to move the car to a landing does not exceed 150 N, which complies with the following:
a) if the means for moving the car can be driven by the lift moving, then it shall be a smooth, spokeless wheel;
b) if the means is removable, it shall be located in an easily accessible place in the machinery space and suitably marked;
2.8.4.2 an electrical means whose power supply shall be able to move the car with any load to an adjacent landing with a speed not greater than 0,30 m/s after a breakdown.
2.8.5 It shall be possible to check easily whether the car is in an unlocking zone.
2.8.6 If the manual effort to move the car in the upwards direction with its rated load is greater than 400 N, or if no mechanical means is provided, a means of emergency electrical operation shall be provided.
2.8.7 The means to actuate the emergency operation shall be located in either the machine room or the machinery cabinet or on the emergency and tests panel(s).
2.8.8 If a hand winding wheel is provided for emergency operation, the direction of movement of the car shall be clearly indicated on the machine, close to the hand winding wheel.
If the wheel is not removable, the indication may be on the wheel itself.
2.8.9 The speed of the car, half loaded, in upwards and downward motion, in mid-travel, excluding all acceleration and retardation periods, shall not exceed the rated speed by more than 5 %, when the supply is at its rated frequency, and the motor voltage is equal to the rated voltage of the equipment.
2.8.10 Motors supplied directly from A.C. or D.C. mains by contactors.
The supply shall be interrupted by two independent contactors, the contacts of which shall be in series in the supply circuit. If, whilst the lift is stationary, one of the contactors has not opened the main contacts, further movement of the car shall be prevented at the latest at the next change in the direction of motion.
A stuck-at failure of this monitoring function shall have the same result.
2.8.11 Traction drive lifts shall have a motor run time limiter causing the de-energizing of the machine, and keep it de-energized, if:
2.8.11.1 the machine does not rotate when a start is initiated;
2.8.11.2 the car/counterweight is stopped in downwards movement by an obstacle which causes the ropes to slip on the traction sheave.
2.8.12 The motor run time limiter shall function in a time which does not exceed the smaller of the following two values: 45 s or time for travelling the full travel in normal operation, plus 10 s, with a minimum of 20 s if the full travel time is less than 10 s.
2.8.13 The return to normal operation shall only be possible by manual resetting by a competent maintenance person. On restoration of the power after a supply disconnection, maintaining the machine in the stopped position is not necessary.
2.8.14 The motor run time limiter shall not affect the movement of the car under either the inspection operation or the emergency electrical operation.
2.8.15 Lift machine for hydraulic lifts
2.8.15.1 In the case of multiple jacks all the jacks shall be hydraulically connected in parallel so that they all are lifting with the same pressure.
2.8.15.2 The mass of the balancing weight, if any, shall be calculated such that in case of a rupture of the suspension gear (car/balancing weight), the pressure in the hydraulic system does not exceed two times full load pressure.
2.8.15.3 If a jack extends into the ground it shall be installed in a protective tube, sealed at its bottom end. If it extends into other spaces it shall be suitably protected.
2.8.15.4 Stops shall be provided between successive sections to prevent the rams from leaving their respective cylinders.
2.8.15.5 For emergency operation, the car moved downwards
2.8.15.5.1 The lift shall be provided with a manually operated emergency lowering valve allowing the car, even in the case of a power failure, to be lowered to a level where the passengers can leave the car, and located in the relevant machinery space: machine room or machinery cabinet or on the emergency and tests panel(s).
2.8.15.5.2 The speed of the car shall not exceed 0,30 m/s.
2.8.15.5.3 The operation of this valve shall require a continual manual force.
2.8.15.5.4 This valve shall be protected against involuntary action.
2.8.15.5.5 The emergency lowering valve shall not cause further sinking of the ram when the pressure falls below a value predetermined by the manufacturer.
In the case of indirect acting lifts where slack rope/chain can occur, manual operation of the valve shall not cause the sinking of the ram beyond that causing the slack rope/chain.
2.8.15.5.6 Near the manually operated valve for emergency downward movement there shall be a plate stating: “Cẩn thận - Hạ xuống khẩn cấp” (“Caution - Emergency lowering”).
2.8.15.6 For emergency operation, the car moved inwards
2.8.15.6.1 A hand-pump which causes the car to move in the upwards direction shall be permanently available for every hydraulic lift.
The hand-pump shall be stored in the building where the lift is installed and shall be accessible only to authorized persons. Provisions for the connection of the pump shall be available at every lift machine.
Where not permanently installed clear indications on where the hand pump is located and how to properly connect it shall be available to maintenance and rescue operators.
2.8.15.6.2 The hand-pump shall be connected to the circuit between the non-return valve or down direction valve(s) and the shut-off valve.
2.8.15.6.3 The hand-pump shall be equipped with a pressure relief valve limiting the pressure to 2,3 times the full load pressure.
2.8.15.6.4 Near the hand pump for emergency upward movement there shall be a plate stating “Cẩn thận - Đi lên khẩn cấp” (“Caution - Emergency lifting”).
2.8.15.7 If the lift serves more than two levels, it shall be possible to check whether the car is in an unlocking zone by a means, which is independent of the power supply, from the relevant machinery space: the machine room or the machinery cabinet or the emergency and test panel(s) where the devices for emergency operations are fitted. This requirement is not applicable to lifts, which are fitted with a mechanical anti-creep device.
2.8.15.8 Hydraulic lifts shall have a motor run time limiter causing the de-energizing of the motor, and keep it de-energized, if the motor does not rotate when a start is initiated or the car does not move.
2.8.15.9 The motor run time limiter, even if tripped, shall not prevent the inspection operation and the electrical anti-creep system.
2.8.15.10 Protection against overheating of the hydraulic fluid
A temperature detecting device shall be provided. This device shall stop the machine and keep it stopped.
2.9. Electric installations and appliances
2.9.1 All controlgear shall be mounted so as to facilitate its operation and maintenance from the front. Where access is required for regular maintenance or adjustment, the relevant devices shall be located between 0,40 m and 2,0 m above the working area. It is recommended that terminals be at least 0,20 m above the working area and be so placed that conductors and cables can be easily connected to them. These requirements are not applicable to controlgear on the car roof.
2.9.2 Heat emitting components (for example heat sinks, power resistors) shall be so located that the temperature of each component in the vicinity remains within the permitted limit.
2.9.3 in the lift well, machinery spaces and pulley rooms, protection of the electrical equipment against direct contact shall be provided by means of casings;
2.9.4 when equipment is accessible to non authorized persons, protection against direct contact shall be applied.
2.9.5 If the design temperature of electrical equipment provided with temperature monitoring devices is exceeded, then the car shall stop at a landing such as the passengers can leave the car. An automatic return to normal operation of the lift shall only occur after sufficient cooling down.
2.9.6 If the design temperature of the hydraulic machine motor and/or oil provided with a temperature monitoring device is exceeded, then the car shall stop directly and return to the bottom landing such as the passengers can leave the car. An automatic return to normal operation of the lift shall only occur after sufficient cooling down.
2.9.7 For each lift, a main switch capable of breaking the supply to the lift on all the live conductors shall be provided. This switch shall be provided at an appropriate location and shall not cut the circuits feeding:
2.9.7.1 car lighting and ventilation;
2.9.7.2 socket outlet on the car roof;
2.9.7.3 lighting of machinery spaces and pulley rooms;
2.9.7.4 socket outlet in the machinery spaces, pulley rooms and in the pit;
2.9.7.5 lighting of the well.
2.9.8 Each incoming source of supply to the lift shall have a supply disconnecting device located close to the main switch. In the case of a group of lifts, if, after the opening of the main switch for one lift, parts of the operating circuits remain live, these circuits shall be capable of being separately isolated without breaking the supply to all the lifts in the group.
2.9.9 While the main switch has disconnected the supply to the lift, any automatic operated movement of the lift (e.g. automatic battery powered operation) shall be prevented.
2.9.10 The electric lighting supplies to the car, the well and the machinery spaces and pulley rooms, and emergency and test panel(s), shall be independent of the supply to the machine, either through another circuit or through connection to the machine supply circuit on the supply side of the main switch or the main switches.
2.10. Controls - Final limit switches
2.10.1 This control shall be by the aid of buttons or similar devices, such as touch control, magnetic cards, etc. These shall be placed in boxes, such that no live parts are accessible to the user.
2.10.3 Visible notices or signals shall permit persons in the car to know at which landing the lift has stopped.
2.10.4 The stopping accuracy of the car shall be ± 10 mm. If, during e.g. loading and unloading phases, the levelling accuracy of ± 20 mm is exceeded, it shall be corrected to ± 10 mm.
2.10.5 The lift shall be fitted with a device to prevent normal starting, including re-levelling, in the event of overload in the car. In the case of hydraulic lifts, the device shall not prevent re-levelling.
2.10.6 In the event of overload:
2.10.6.1 users shall be informed by an audible and a visible signal in the car;
2.10.6.2 automatic power operated doors shall be brought into the fully open position;
2.10.6.3 manually operated doors shall remain unlocked.
2.10.7 The inspection operation switch in the inspection position shall satisfy the following conditions for functioning simultaneously:
2.10.7.1 neutralise the normal operation controls;
2.10.7.2 neutralise emergency electrical operation;
2.10.7.3 levelling and re-levelling shall be disabled;
2.10.7.4 any automatic movement of power operated doors shall be prevented. Power operated closing of the door(s) shall depend on:
2.10.7.4.1 the operation of a direction pushbutton for car movement; or
2.10.7.4.2 additional switches protected against accidental operation for controlling the mechanism of doors.
2.10.7.5 the car speed shall not exceed 0,63 m/s;
2.10.7.6 car speed shall not exceed 0,30 m/s when the vertical distance above any standing area on car roof or in pit is 2,0 m or less;
2.10.7.7 the limits of normal car travel shall not be overrun, i.e. not exceed the stopping positions in normal operation;
2.10.7.8 the operation of the lift shall remain dependent on the safety devices;
2.10.7.9 if more than one inspection control station is switched to “INSPECTION", it shall not be possible to move the car from any of them unless the same push buttons on the inspection control stations are operated simultaneously.
2.11.1 The lift should have mechanical or electrical rescue system to permit easy operations during the rescue in the event of a breakdown:
2.11.1.1. Mechanical rescue
2.11.1.1.1. Mechanical means shall be provided to the lift (acting bars, towbars, hooks, etc.) to move the car to the nearest landing.
2.11.1.1.2. In case of failure to gain access to the machine when carrying out mechanical rescue, a mechanism for opening the machine's brake shall be located outside the well in a position convenient for the rescue operator.
2.11.1.1.3. At the brake opening position, measures should be in place to permit easy recognition of the car position (marking the rope or observing the display system of the lift controller, etc.).
2.11.1.1.4. A mechanism for releasing the overspeed governor shall be located outside the well in a position convenient for the rescue operator.
2.11.1.2. Electrical rescue
Electrical means shall be provide to the lift and satisfy the following requirements:
2.11.1.2.1. It is required to permit the control of motion of the car from the control cabinet (the control cabinet shall be located outside the well in a position convenient for the rescue operator) by pressing the button continuously. The direction of motion shall be clearly indicated.
2.11.1.2.2. If the control cabinet located inside the well but is inaccessible, control equipment must be provided at such location.
2.11.1.3. Lift maintenance
Every lift manufacturer must establish an appropriate maintenance procedure so as to ensure safety of persons during the maintenance.
2.11.1.4. Rescue procedure
Every lift manufacturer must establish an appropriate rescue procedure in the event of breakdowns.
2.11.2 The lift shall be equipped with an emergency communication system so that persons inside the car can communicate with persons outside or rescue department in the event of a lift breakdown. The communication system shall satisfy the following requirements:
2.11.2.1 Buttons or devices of communication equipment must be located inside the car, in visible and accessible positions, be easy to use and activated in the event of an lift failure or breakdown.
2.11.2.2 The emergency communication system shall be installed ensuring a two-way voice communication allowing permanent contact with a rescue service.
2.11.2.3 The emergency communication system shall have its own energy storage unit (battery, accumulator or similar components) that aids in maintaining a minimum operating time of 1 hour even in the event that a backup power supply for the fan or the lighting system is off.
2.11.2.4 If the lift is installed in an apartment building, office building, shopping mall, hospital, hotel, manufacturing plant or public area (such as airport, train station, etc.), then the communication system must be connected to the protection or security department of the building and phone numbers for contact with the rescue department where necessary must be provided in the car at a visible location.
2.11.2.5 The alarm system must be regularly checked during the lift maintenance and inspection.
2.11.3 The lift must be provided with an alarm system to notify status of the lift. The alarm device shall ensure that all alarm information is emitted until confirmed, even during maintenance.
3. Lift quality management and lift safety
3.1.1 Every lift, upon being domestically produced, imported, sold on the market or during its operation, must have a sufficient technical documentation, including:
3.1.1. Lift profile
A lift profile shall contain the following information:
3.1.1.1.1 General information about the lift, including at least the following:
- Code, serial number, manufacturer, year of manufacture and place of manufacture.
- Technical characteristics: uses, load, speed, stops, drive type, lift control system, characteristics of ropes and guide rails, environment where the lift is operated, etc.
3.1.1.1.2 Technical drawings:
+ Operating principle diagram;
+ Drawings showing locations of safety components/devices, control system diagrams, rope reeving arrangement and counterweight of the lift.
3.1.1.1.3. Logbook for notes about inspections, checks, repairs and maintenance. Persons directly carrying out inspections, checks, tests, repairs, maintenance or replacement of components/devices of the lift shall record information in the logbook. Information includes:
+ Name and signature of the responsible person;
+ the date of inspection/check/test/repair/maintenance/replacement;
+ Contents (of inspection/check/test/repair/maintenance/replacement, etc.);
+ Recommendations for users during the lift operation.
3.1.1.2 Instructions for use, instructions for maintenance, rescue/breakdown handling procedures, technical recommendations of the manufacturer.
3.1.2 Before being placed on the market, lifts must have their conformity with this Regulation certified by a certification body designated or recognized by the Ministry of Labor, War Invalids and Social Affairs.
3.1.3 They must be labeled as prescribed.
3.1.4 Their conformity must be declared as prescribed and subject to supervision by product and goods quality inspecting authority.
3.1.5 Every manufacturer and provider of lifts shall comply with regulations on safety during the manufacturing and provision of lifts.
3.2. Certification of conformity of lifts and their safety components
3.2.1. Certification of conformity of lifts and their safety components shall focus on:
3.2.1.1 checking design documentation and lift profile.
3.2.1.2 conducting checks/tests of safety components/devices of the lift specified in 1.3.7 of this Regulation according to the requirements in section 5 of TCVN 6396-50:2017.
3.2.2. Conformity of lifts and their safety components shall be certified using method 5, 7 or 8 (mentioned in the Appendix II of the Circular No. 28/2012/TT-BKHCN dated December 12, 2012 of the Minister of Science and Technology).
3.2.3 The certificate of conformity shall specify information about the lift, including:
- Code;
- Serial number;
- Manufacturer;
- Origin;
- Year of manufacture;
- Technical characteristics (lift type, load, rated speed, stops and allowed number of persons in the lift);
- Conclusion on the conformity of design of the lift and its component parts with the requirements set out in this Regulation.
3.3. Inspection of technical safety of lifts
3.3.1 Before the lift is put into service, it shall undergo an initial inspection, during-operation inspections or irregular inspections (in the case of change of the design or major repair) in accordance with the inspection procedures issued by the Ministry of Labor, War Invalids and Social Affairs. If all requirements are met, an inspection stamp shall be affixed to the lift car.
3.3.2 Information about contents and results of inspections shall be recorded in the lift profile.
3.3.3 Technical safety inspection of lifts must be carried out by a technical occupational safety inspection body issued with the certificate for eligibility for provision of inspection services by the Ministry of Labor, War Invalids and Social Affairs.
3.4. Requirements applicable to lifts during their operation
3.4.1 Every organization and individual managing the lift (hereinafter referred to as “lift manager”) must archive the following documents
- Technical documentation specified in 3.1.1 of this Regulation.
- Certificate of conformity;
- Acceptance testing documents and report related to the lift structure satisfying the requirements of this Regulation;
- Effective certificate of inspection result enclosed with a technical occupational safety inspection report;
- Maintenance and repair records or documents (if any) relating to repair and replacement of parts/devices related to the lift.
3.4.2 If a technical documentation specified in 3.1.1 of this Regulation is insufficient, the lift manager must supplement it. The supplementation shall be carried out by the certification body designated or recognized by the Ministry of Labor, War Invalids and Social Affairs.
3.4.3 During the lift operation, if it is found that the lift can be dangerous to occupants or loses power or is being checked, repaired or maintained, a sign saying “The lift is temporarily out of service” must be available at landings and the circuit breaker supplying power to the lift shall be turned off.
2.11.2.4 Every organization and individual managing lifts installed in apartment buildings, office buildings, shopping malls, hospitals, hotels, manufacturing plants or public areas (such as airports, train stations, etc.) shall appoint at least 01 person to be responsible for the lift operation and such person must be trained in safe operation of the lift and plans for handling lift breakdowns.
3.4.5 The lift manager must take effective measures to prevent unauthorized persons from entering the following positions:
- Machine room.
- Pit.
- Carrying out operations on the car roof.
- Using keys to open landing doors, ventilation panels, observation doors and machine room doors. Keys to enter into the aforesaid positions by the persons responsible for operation of the lift and duplicate keys must be handed over to those who stand the watch for operation of lifts (if any).
- Power supply switch cabinet and fuse box.
3.5. Requirements concerning installation, maintenance and repair of lifts
3.5.1 Lifts shall be maintained at least every 03 (three) months during their operation. For the lifts installed in apartment buildings, office buildings, shopping malls, hospitals, hotels, manufacturing plants or public areas (such as airports, train stations, etc.), they shall be maintained shall at least every month.
3.5.2. Responsibilities of lift installation, maintenance and repair service providers:
3.5.2.1 Prepare a logbook for installation and maintenance (indicating names of responsible persons, duties to be performed and deadline);
3.5.2.2 Appoint persons who are knowledgeable about the working principle of the lift, are trained in occupational safety and have necessary skills to perform the work related to installation, maintenance and repair of the lift.
3.5.2.3. Comply with the requirements of this Regulation and ensure safety during the lift installation, maintenance and repair.
3.5.2.4 Put up signs or barriers so as to prevent unauthorized persons from accessing the area where lift installation, maintenance or repair work is being carried out.
3.5.2.5 Record contents of lift installation, maintenance and repair in the lift profile.
3.5.3 Responsibilities of lift managers:
3.5.3.1 Ensure that lifts undergo periodic inspections and maintenance as prescribed in 3.3 and 3.5.1 of this Regulation and satisfy all safety requirements before being put into service.
3.5.3.2 Cooperate with lift installation, maintenance and repair service providers in providing information and documents to enable them to perform their work.
3.5.3.3 Archive documents and records relating to maintenance and repair or replacement of parts of the lift.
4. Responsibilities of organizations and individuals
4.1. Organizations and individuals designing, manufacturing, importing, distributing, installing, using, repairing and maintaining lifts shall implement the provisions specified in this Regulation.
4.2. This Regulation shall serve as the basis for inspection carried out by regulatory bodies and lift quality inspection authorities as well as the basis for certification of conformity granted by conformity-assessing organizations.
5. Implementation
5.1. The Department of Work Safety affiliated to the Ministry of Labor, War Invalids and Social Affairs shall inspect and provide guidelines for the implementation of this Regulation.
5.2. Local labor authorities shall inspect and provide guidelines for the implementation of the provisions set out in this Regulation.
5.3. Difficulties that arise during the implementation of this document should be promptly reported to the Ministry of Labor, War Invalids and Social Affairs for consideration and resolution./.
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1 NOTE: A machinery cabinet with its associated working area(s) is considered as a machinery space.
2 NOTE: For 2.2.14.1.1 and 2.2.14.1.2 of this Regulation, the probe surface used to apply the test forces may be of soft material to avoid damage to the door coating.
3 NOTE: These forces could be applied on the structural wall, excluding mirrors, decorative panels, car operating panel(s), etc.
4 NOTE: The configuration of the car may be so that handrail, tip-up seat, etc., may generate shadow that may be ignored.
5 NOTE: Some lifting of the car or counterweight is acceptable provided there is no risk of crushing at the extremes of travel or falling back of the car or counterweight causing impact forces on the means of suspension and excessive retardation of the car.
6 NOTE: It is acceptable for the means to be stored within the well and moved outside when a test is performed.
7 NOTE: A passive acting electrical component that reduces sparking (e.g. diode, capacitor or varistors) is not considered as a means of delay.
tính bằng m/s, đối
với bộ hãm an toàn loại êm khi tốc độ định mức lớn hơn 1 m/s.
