Tender Doc for Elevator Works

7/28/2019 Tender Doc for Elevator Works

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DELHI METRO RAIL CORPORATION LIMITED(A Joint Venture of Govt. of INDIA & GNCTD)

TENDER DOCUMENT

FOR

ELEVATOR WORKS

Of

Institute of Liver & Biliary Sciences (ILBS)

D-1, Vasant Kunj, Delhi-110070

Volume - 2

SPECIAL SPECIFICATIONS

DELHI METRO RAIL CORPORATION LIMITEDMetro Bhawan, 13, Fire Brigade Lane

Barakhamba Road, New Delhi-110001 India


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TENDER NO: DMRC/Elec./IT&PD/ILBS/Elevator/03

Elevator Works of

Institue of Liver & Biliary Sciences (Including Nurses & Interns Hostel) AT

ILBS,D-1,Vasant Kunj,Delhi-110070

SL. NO. DESCRIPTION

VOLUME 1

1 Notice Inviting Tender

2 Instruction to Tenderers (Including Annexures)

3 Special Conditions of Contract

4 DMRC Labour Welfare Rules

VOLUME 2

1 Special Specifications

VOLUME 3 : NOT USED

VOLUME 4

1 Bill of Quantities

VOLUME 5

1 Tender Drawings

VOLUME 6

1 Condition of Contract of Safety , Health & Environment

2 General Conditions of Contract


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ELEVATOR WORKS(Special Specifications)

CONTENTS

Page

1. Terminology 3

2. Design & Performance Requirements 10

3. Design Criteria & Performance Specifications Elevators 15

4. Design Services 49

5. Electromagnetic Compatibility Requirements (EMC) 50

6. Fire Safety Requirements 53

7. Installation 54

8. Testing & Commissioning of Elevators 55

9. Maintenance 68

9.1 Maintenance Requirements

9.2 Maintenance Service

10. Special Tools, Commissioning Spares & DLP Spares 78

11. Quality Assurance & System Assurance 79

12. Materials & Workmanship Requirements 83

13. Appendix I : Check List 84

14. Appendix II : List Of Indian & International Standards ConnectedWith Lift Installation 88

15. Appendix III : Instruction To Be Displayed In The Lift Car And LiftLandings (Freight cum Passenger Elevator) 89

16. Appendix IV : Instruction To Be Displayed In The Lift Car And LiftLandings (Passenger Lifts) 90

17. Appendix V : Barrier Free Requirements 91

18. Appendix VI : Safety Of Lifts In Public Buildings CVC Report 92


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Contract : DMRC/ELECT./IT&PD/ILBS/ELEVATOR/03 Special Specifications

Confidential Special Specifications - Page 2 of 131 Dec 2010

19. Appendix VII : Bombay Lift Rules 1958 as Amended upto 1989 95

20. Appendix VIII-1 : Technical Parameters( Passenger Elevator) 113

21. Appendix VIII-2 : Technical Parameters (Freight Elevator) 121

22. Appendix IX List of Approved makes 129

24. Appendix A 132


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TECHNICAL SPECIFICATIONS FOR ELEVATOR WORKS

(I) TERMINOLOGY

1.0 For the purpose of Lift specifications following definitions shall apply:

1.1 Bottom Car Runby

The distance between the car buffer striker plate and the striking surface of the carbuffer when the car is in level with the bottom terminal landing.

1.2 Bottom Counter weight Runby

The distance between the counterweight car buffer striker plate and the strikingsurface of the counterweight buffer when the car is in level with the bottom terminallanding.

1.3 Buffer

A device designed to stop a descending car or counterweight beyond its normal limitof travel by storing or by absorbing and dissipating the kinetic energy of the car orcounterweight.

1.3.1 Oil Buffer

A buffer using oil as a medium which absorbs and dissipates the kinetic energy of thedescending car or counterweight.

i) Oil Buffer stroke

The oil-displacing movement of the buffer plunger or piston, excluding thetravel of the buffer plunger accelerating device.

ii) Spring-Buffer

A buffer which stores in a spring the kinetic energy of the descending car orcounterweight.

iii) Spring-Buffer load rating

A load required to compress the spring by an amount equal to its stroke.

1.4 Call Indicator

A visual and audible device in the car to indicate to the attendant the liftlandings from which calls have been made.

1.5 Car Bodywork

The enclosing bodywork of the lift car which comprises the sides and roof andis built upto the car platform.


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1.6 Car Frame

The supporting frame or sling to which the platform of the lift car, its safetygear, guide shoes and suspension ropes.

1.7 Car Platform

The part of the lift car which forms the floor and directly supports the load.

1.8 Clearance

i) Bottom Car Clearance

The clear vertical distance from the pit floor to the lowest structural or mechanicalpart, equipment or device installed beneath the car platform aprons or guards locatedwithin 300mm, measured horizontally from the sides of the car platform when the carrests on its fully compressed buffers.

ii) Top Car Clearance

The clear vertical distance from the top of the car crosshead, or between the top ofthe car where no crosshead is provided, and the nearest part of the overheadstructure or any other obstruction when the car floor is level with the top terminallanding.

iii) Top Counterweight Clearance

The clear vertical distance from between any part of the counterweight structure andthe nearest part of the overhead structure or any other obstruction when the car flooris level with the bottom terminal landing.

1.9 Control

The system governing starting, stopping, direction of motion, acceleration, speed andretardation of moving member.

i) Single- Speed Alternating Current ControlA Control for a driving machine induction motor which is arranged to run at a single-speed.

ii) Electronic DevicesA system of control which is accomplished by the use of electronic devices for driving

the lift motor at variable speed.

iii) Alternating Current Variable Voltage Variable Frequency (ACVVVF) ControlA system of speed control which is accomplished by varying the voltage andfrequency of the power supply to the driving machine induction motor.

iv) Solid- State D.C. Variable Voltage ControlA solid-state system of speed control which is accomplished by varying the voltageand direction of the power supply to the armature of driving machine D.C. motor.

1.10 Counter weightA weight or series of weights to counter-balance the weight of the lift car and part of

the rated load.

1.11 Deflector Shieve


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An idler pulley used to change the direction of a rope lead.1.12 Door

i) Door, Centre Opening Sliding

A door which slides horizontally and consists of two or more panels which open from

the centre and are usually so interconnected that they operate simultaneously.

1.13 Door Closer

A device which automatically closes a manually-opened door.

1.14 Door Operator

A power operated device for opening and closing doors.

1.15 Car Door Electric Contact

An electric device, the function of which is to prevent operation of the driving machineby the normal operating device unless the car door is in the closed position.

1.16 Electrical and Mechanical Interlock

A device provided to prevent simultaneous operation of both up and down relays.

1.17 Electro-Mechanical Lock

A device which combines in one unit, electric contact and a mechanical lock jointlyused for the landing and/ or car doors.

1.18 Emergency Stop Push or Switch

A push button or switch provided inside the car designed to open the control circuit tocause the lift car to stop during emergency.

1.19 Floor Levelling Switch

A switch for bringing the car to level at slow speed in case of double speed orvariable speed machines.

1.20 Floor-Selector

A mechanism forming a part of the control equipment, in certain automatic lifts,designed to operate controls which cause the lift car to stop at the required landings.1.21 Floor-Stopping Switch

A switch or combination of switches arranged to bring the car to rest automatically ator near any pre-selected landing.

1.22 Freight cum Passenger LiftA lift designed primarily for the transport of goods as well as of Passenger.

1.23 Guide Rails Fixing

The complete assembly comprising the guide rails bracket and its fastenings.

1.24 Guide Rails ShoeAn attachment to the car frame or counterweight for the purpose of guiding the lift caror counterweight frame.


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1.25 Landing Call PushA push button fitted at a lift landing, either for calling the lift car, or for actuating thecall indicator.

1.26 Landing DoorThe hinged or sliding porting of a lift well enclosure, controlling access to a lift car at

a lift landing.

1.27 Landing ZoneA space extending from a horizontal plane 40 cm below a landing to a plane 40 cmabove the landing.

1.28 Levelling Devices

i) Levelling Device, Lift CarAny mechanism which either automatically or under the control of the operator,moves the car within the levelling zone towards the landing only, and automaticallystops it at the landing.

ii) Levelling Device, One Way AutomaticA device which corrects the car level only in case of under-run of the car but will notmaintain the level during loading and unloading.

iii) Levelling Device, Two-way Automatic, MaintainingA device which corrects the car level on both under-run and over-run, and maintainsthe level during loading and unloading.

iv) Levelling Device, Two-way Automatic Non-maintainingA device which corrects the car level on both under-run and over-run but will notmaintains the level during loading and unloading.

1.29 Levelling ZoneThe limited distance above or below a lift landing within which the levelling devicemay cause movement of the car towards the landing.

1.30 Lift

An appliance designed to transport persons or materials between two or more levelsin a vertical or substantially vertical direction by means of a guided car or platform.

1.31 Lift Car

The load carrying unit with its floor or platform, car frame and enclosing body work.

1.32 Lift LandingThat portion of a building or structure used for discharge of passengers or goods orboth into or from a lift car.

1.33 Lift PitThat space in the lift well below the level of the lowest lift landing served.

1.34 Lift WellThe unobstructed space within an enclosure provided for the vertical movement ofthe lift car (s) and any counterweight (s), including the pit and the space for top

clearance.

1.35 Lift Well Enclosure


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Any structure which separates the lift well from it surroundings.

1.36 Lift BeamA beam, mounted immediately below the machine room ceiling, to which lifting tacklecan be fixed for raising or lowering parts of lift machine.

1.37 Operation

The method of actuating the control of lift machine.

i) Automatic OperationA method of operation in which by a momentary pressure of a button the lift car is itin motion and caused to stop automatically at any required lift landing.

ii) Selective Collective Automatic OperationAutomatic operation by means of one button in the car for each landing level servedand by up and down buttons at the landing, wherein all stops registered by themomentary actuation of the car made as defined under non-selective collectiveautomatic operation, but wherein the stops registered by the momentary actuation ofthe landing buttons are made in the order in which the landings are reached in each

direction of travel after the buttons have been actuated. With this type of operation,all up landing calls are answered when the car is travelling in the up direction and alldown landing calls are answered when the car is travelling in the down direction,except in the case of the uppermost or lowermost calls which are answered as soonas they are reached irrespective of the direction of travel of the car.

iii) Car Switch OperationMethod of operation by which the movement of lift car is directly under the operationof the attendant by means of a handle.

iv) Signal OperationSame as collective operation, except the closing of the door is initiated by theattendant.

v) Double Button (continuous pressure) OperationOperation by means of buttons or switches in the car and at the landings any ofwhich may be used to control the movement of the car as the button or switch ismanually pressed in the actuating position.

1.38 Operating DeviceA car switch, push button or other device employed to actuate the control.

1.39 Over Head Beams

The members, usually of steel, which immediately support the lift equipment at thetop of the lift well.


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1.40 Over-Speed GovernorAn automatic device which brings the lift car and/or counterweight to rest byoperating the safety gear in the event of the speed in a descending directionexceeding a predetermined limit.

1.41 Passenger LiftA lift designed for the transport of passengers.

1.42 Position and/or Direction IndicatorA device which indicates on the lift landing or in the lift car or both, the position of thecar in the lift well or the direction or both in which the lift car is traveling.

1.43 Rated LoadThe maximum load for which the lift car is designed and installed to carry safely at itsrated speed.

1.44 Rated Speed

The means of the maximum speed attained by the lift car in the upward and

downward direction with rated load in the lift car.

1.45 Retiring Cam

A device which prevents the landing doors from being unlocked by the lift car unlessit stops at a landing.

1.46 Roping Multiple

A system of roping where, in order to obtain a multiplying factor from the machine tothe car, multiple falls of rope are run around sheaves on the car or counterweight orboth. It includes roping arrangement of 2 to 1, 3 to 1 etc.

1.47 Safety Gear

A mechanical device attached to the lift car or counterweight or both, designed tostop and to hold the car or counterweight to the guides in the event of free fall or ifgovernor operated of over speed in the descending direction.

1.48 Sheaves

A rope wheel, the rim of which is grooved to receive the suspension ropes but towhich the ropes are not rigidly attached and by means of which power is transmitted

from the lift machine to the suspension ropes.

1.49 Slack Rope SwitchSwitch provided to open the control circuit in case of slackening of rope (s).

1.50 Suspension RopesThe ropes by which the car and counterweight are suspended.

1.51 Terminal Slow Down Switch

A switch when actuated shall compulsorily cut off the high speed and switch on thecircuitry to run the elevator in levelling speed before reaching on terminal landings.

1.52 Terminal Stopping Switch Normal


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Switch for cutting all the energizing current in case of car travelling beyond the top orbottom landing or a switch which cuts off the energizing current so as to bring the carto a stop at the top and bottom level.

1.53 Terminal Stopping Device Final

A device which automatically cause the power to be removed from an electric lift

driving-machine motor and brake, independent of the functioning of the normalterminal stopping device, the operating device or any emergency terminal stoppingdevice, after the car has passed a terminal landing.

1.54 Total Headroom

The vertical distance from the level of the top lift landing to the bottom of the machineroom slab.

1.55 Travel

The vertical distance between the bottom and top lift landing served.

1.56 Geared Machine

A machine in which the power is transmitted to the sheave through worm or wormand spur reduction gearing.


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2.0 DESIGN & PERFORMANCE REQUIREMENTS

2.1 General

2.1.1 The design, manufacture, supply, installation, testing and commissioning ofElevators with or without Machine room at the top shall meet the design andperformance requirements as specified in the Special Specifications.

2.2 Basic Design Philosophy and Requirements

2.2.1 Proven Design

(a) The Contractor shall develop the design based on this specificationand on proven and reliable Engineering Practices. The design detailsshall be submitted with technical data and calculations to theEmployers Representative for review.

(b) The System, including all Sub-systems and Equipment shall be ofproven design.

(c) The Elevator Sub-systems and Equipment proposed by the Contractorshall have been in Multi Story Buildings and have established theirperformance reliability over a period of at least Five Years.

(d) Where similar equipment or Sub-systems of a different rating arealready proven in service, then the design shall be based on suchequipment. In case these stipulations are not fulfilled, the Contractorshall furnish sufficient information to prove the basic soundness andreliability of the offered Sub-system.

The design philosophy should meet the following criteria:

(i) Application of state-of-the-art Technology(ii) Service proven design(iii) Design life 30 years(iv) Minimum life cycle cost(v) Low maintenance cost(vi) Use of interchangeable, modular components(vii) Extensive and prominent labelling of parts, cables and wires(viii) Use of unique serial numbers for traceability of components(ix) High reliability(x) Low energy consumption

(xi) System safety(xii) Adequate redundancy and factor of safety.(xiii) Fire and smoke protection(xiv) Use of fire retardant materials(xv) Environment friendly(xvi) Adherence to operational performance requirements(xvii) Maximum utilisation of indigenous materials and skills, subject to

quality conformity.2.2.2 Adequate margin shall be built into the design particularly to take care of the

higher ambient temperatures, dusty conditions, and high seasonal humidity,etc. prevailing in Delhi.

2.3 Design Management and Control


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2.3.1 In order to ensure that the requirements of this Particular Specification aremet, the Contractor shall establish and maintain documented proceduresusing ISO 9001 to control and verify the design of the System and all itsequipment. These procedures shall be subject to review by the EmployersRepresentative.

2.3.2 The Contractor shall establish and maintain a systematic, documented,

comprehensive, and verifiable system integration process throughout theexecution of the Contract.

2.3.3. This process shall ensure that interfaces and interaction between System,infrastructure, sub-systems, software, and operating and maintenancerequirements have been identified and engineered to function together as asystem.

2.4 System Integration Process

2.4.1 The Contractor shall systematically identify and formally document all design,manufacturing and operational interfaces between equipment within the

System, and between the System and external systems, facilities, operationsand the environment likely to affect or be affected by the System.

2.4.2 The Contractor shall define methods to confirm compatibility between Systemequipment and carrying out integration tests at different stages of the designand interface management process to demonstrate that all equipmentfunctions perform properly, both individually and as part of the completeSystem.

2.4.3 The system integration process shall be capable of audit by the Employers

Representative.

2.5 Interface Management Plan

2.5.1 The Contractor shall submit to the Employers Representative for review anInterface Management Plan (IMP) and Detail Interface Documents, inaccordance with the NIT of Volume 1, which defines how the Contractor willsystematically identify and document technical interfaces. InterfaceManagemnet Plan shall be prepared Jointly with Civil , LV , Fire , HVAC &Interior Contractors.

2.6 Design Submission Requirements

2.6.1 The Contractor shall perform his designs for the Contract in accordance withthe requirements of this Specifications. The Contractor shall submit to theEmployers Representative for his review, relevant design information asidentified under each stage. Such submissions shall incorporate the relevantStandards applicable.

2.7 Performance Features Required

2.7.1 The Contractor shall provide built-in diagnostics and remote monitoring

functions for each microprocessor-based equipment and module of thesystems such that the performance requirements can be demonstrated.


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2.7.2 The reliability and maintainability processes and procedures shall be planned,integrated and developed in conjunction with the operating environment, andthe design, development and production functions to permit the most effectiveand economical achievements of the systems and equipment designobjective.

2.7.3 A high design standard incorporating redundancy if practicable, flexible

system arrangement, together with good quality products, and adherence tostrict construction standards, are required to ensure high reliability of Elevatorsystems.

2.8 Reliability Requirements

2.8.1 The Reliability requirements shall be subsidiary to the Availability andMaintainability requirements.

2.9 Availability

Service Availability Targets

The Systems shall be designed to ensure that failure of any majorequipment, caused by an external accident or negligence of internalstaff, will not lead to unavailability of the whole System, other thantemporary outage of the failed equipment.

All elements of the systems shall be able to be maintained duringNon-Operation hours to avoid interrupting passenger train services.

2.10 Maintainability

2.10.1 The Contractor shall undertake maintainability analysis to assess thepreliminary maintainability targets of the systems.

2.10.2 The Contractor shall state the maintainability requirements, and demonstratethat System maintainability is sufficient to support the claimed Systemreliability and availability performance. The Contractor shall demonstrate thatmaintenance errors have been considered, and, as far as is practicable, therisk of maintenance-induced faults has been mitigated by the appropriatedesign.

2.10.3 The equipment to be supplied by the Contractor must be designed forminimum or no maintenance. Maintenance activity required must be capableof being performed with minimum or no impact on the day to day operation.

2.10.4 Maintenance activities may be classified into two areas, routine preventativeand corrective, both of which affect service availability. Other maintenancestrategies such as condition monitoring may be incorporated.

2.10.5 Routine/preventive maintenance periods shall be limited to non-operationalmaintenance hours during the night or if essential during off peak periods.

2.10.6 To optimize speedy corrective maintenance, techniques employing automatic

diagnostics test points, and rapid repair facilities shall be provided.


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2.11 Safety

2.11.1 Safety Requirements

The installation design shall incorporate measures to avoid presentingsafety hazards to people.

The Systems design shall incorporate measures to provide for its safemanagement and operation.

The installation shall meet the fire safety requirements generally asper NFPA-130.

The design of the earthing system shall conform to IS 3043 : 1987

2.11.2 Safety Targets

The Contractor shall show that the Systems can be maintained safely. The contractor shall demonstrate that the systems have been

designed to minimise the risk due to operator and maintainer error,considering both ergonomic aspects of the system designed to reduce

the likelihood of the error, and protective measures to mitigate theconsequence of such error.

2.12 Conformity with Governing Specifications and other StatutoryRequirements

2.12.1 The work shall be carried out in accordance with the followinggoverning specifications and other statutory rules:

Indian Electricity Rules 1956 with latest amendments.

Indian Electricity Act 1910 with latest amendments.

Rules and Regulations prescribed by local authorities as applicable.

Relevant, Indian Standards, IEC Standards, British Standards, andother National/International standards as applicable.

CPWD Specifications.

2.12.2 The Contractor shall furnish information asked for by a statutory body(e.g., Inspector of lifts) in particular format as directed by EmployersRepresentative.


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2.13 Codes and Regulations

2.13.1 Local Codes, Regulations and StandardsUnless otherwise stated herein, the design, installation, testing andcommissioning shall comply with the latest edition of all applicable standardsissued by the Bureau of Indian Standards and other relevant local regulationsapplicable.

IS 14665: All parts (Latest Version).

IS 15330: Installation and Maintenance of lifts for Handicapped Persons Code of Practice

IS 7759: Specification for lift doors locking device and controls.

IS-1860 Code of practice for Installation, Operation and Maintenance ofElectric passenger and goods lifts

Bombay Lift Rules with all Amendments.

Additional requirements imposed by statutory or government authorities not listedabove shall be complied with.

2.13.2 Additional Standards

Elevators shall comply with the requirements as per latest edition of EN 81and BS 5655 of the British Standards: Safety rules for the construction andinstallation of electric lifts. The provisions related to the application forhandicapped persons stated in these codes shall also be complied with forLifts designated for Handicapped Persons.

The Contractor shall also comply with the Guidelines and space standard forBarrier free Built Environment for Disables And Elderly Persons published byC.P.W.D. (Central Public Works Department). India for such Designated Lifts.

The contractor shall comply with the guidelines for safety of elevatorcirculated vide A. V. series circular no. 822, issued by Ministry of UrbanDevelopment and Poverty Alleviation, Govt. of India vide their letter no.

C-31011/1/2001-AVII dated 7.12.2001.


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3.0 DESIGN CRITERIA AND PERFORMANCE SPECIFICATION ELEVATORS withor without MACHINE ROOM ON TOP

3.1 Introduction

This specification defines the objectives, guidelines and requirements for thecontractors design, manufacture, supply, installation, testing and commissioning of

the Elevators at Institute of Liver & Billiary Sciences, Vasant Kunj, New Delhi.

3.2 General Requirements

a) Each Elevator shall have its own driving machine. The method of drive shall be ElectricTraction with gear / gear less motor with VVVF Control.

b) All elevators shall be capable of operating satisfactorily and smoothly at a rate of 180motors starts per hour or above for a period of not less than 20 hours per day, sevendays a week, within the environmental conditions as stated in the Tender Document andat the location where the elevators are to be installed.

c) The design of the Elevators shall be such that no major repair shall be necessary for aperiod of 20 years from the date of issue of Certificate of Taking Over. This is based onthe requirements that detailed inspections and maintenance are carried out annually,whilst routine cleaning and maintenance are carried out as necessary.

d) Major repair shall mean replacement of car frame, car enclosure, car and landing doors,elevator shaft wiring (except travelling cables), guide rails, drive machine, gear box anddriving sheave, but parts attached to these components which are subjected to normalwear and tear are excluded

e) The design of the Elevators shall take into consideration fire prevention, elimination ofdust and dirt traps, and easy accessibility for cleaning and routine maintenance.

f) The approximate travels and the location of the landings of each Elevator are given inparameters. Each Elevator shall serve the levels as indicated in Lift Plans. The landingdoors shall be at the same side of the shaft. The Contractor shall verify the above andall other relevant information through co-ordination with the Designated CivilContractors.

g) The approximate overhead (headroom) and pit depth for each Elevator are shown in theLift Plans. The Contractor shall co-ordinate with the Designated Civil Contractors tofinalise these details.

The levelling accuracy shall be within 5mm of the finished floor level.

3.3 Drive Machinery :

3.3.1 Electric Supply

Three phase, 50 c/s, 415 V electric supply shall be made available. The entire liftequipment should be suitable for operation at +10% to 15% of the rated supplyvoltage.

3.3.2 Geared machine/Gearless Machine

The lift machine shall be of worm gear reduction type with motor, brake, wormgearing and driving sheave and suitable for VVVF control specified.


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3.3.3 Electric Traction Drive System

3.3.3.1 Traction Machine

The construction of all Elevator machines shall conform with IS 14665, IS - 3534,IS - 4666 and BS 5655: Part 1.

3.3.3.2 Motor

(a) The drive motor shall be AC self lubricating motor suitable to withstandfrequent peak current encountered in the lift duty and shall have highstarting torque, high power factor , high efficiency , Low EnergyConsumption and low starting current. Thermister shall be embedded inthe starter windings to indicated the temperature wind in the motor.

(b) The motor shall be capable of not less than 180 starts per hour withoutexcessive temperature rise.

(c) The maximum temperature rise of the winding shall not exceed 50o

Cabove ambient temperature when operated under normal condition.

(d) The shaft must be capable of withstanding the high stresses due tobraking and should be extended at the free end with a suitable keyway,in order that the Elevator may be operated manually with a hand wheelduring emergency and for effective adjustment.

(e) Provision shall be made to enable the speed to be checked at MainControl Cubicle.

(f) The motor shall carry a nameplate giving full details of its ratings and

characteristics. Motor shall be of TEFC type

(g) The motor used shall have Class F insulation and shall be designed for125% of rated load.

(h) A motor winding tool shall be provided for each Elevator and be placed ina proper holder fixed at a convenient position

3.3.3.3 Sheaves

Sheaves and pulleys shall be of hard alloy, cast iron, SG iron or steel and free fromcracks, sand holes and other defects. They shall have machined rope grooves. Thetraction sheave shall be grooved to produce proper traction and shall be sufficientdimension to provide for wear in the groove. The deflector sheave shall be groovedso as to provide a smooth bed for the rope. The deflector or secondary sheaveassemblies where used shall be mounted in proper alignment with the tractionsheave. Such deflector sheaves shall have grooves larger than rope diameter asspecified in clause 8 of IS 14665 (Part4 Sec 3): 2000. The size of all the sheavesshall be in accordance with clause 8.4 of IS 14665 (Part4 Sec3) : 2000. Wherevernecessary suitable protective guards may be provided. Sheaves shall be fitted withsealed for Life Lubricated Bearings. Adequate provision shall be made to Prevent

any Suspension Ropes leaving groove due to Rope Slack or Introduction of ForeignObjects. Driving Mechanism shall operate under maximum Loading withoutOverheating or Vibration.


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3.3.3.4 Shaft Keys :

Shaft which supports sheaves, gears, coupling and other members which transmittorque shall be provided with tight fittings keys of sufficient strength and quality.

3.3.3.5 Brake :

The lift drive machinery shall be provided with an electromagnetic brake orpermanent magnet break or motor operated brake normally applied by means ofsprings in compression when the operating device is in off position. The brake shallbe suitably curved over the brake drum or brake disc and provided with fire prooffriction lining. The operation of brake shall be smooth, gradual and with minimumnoise. The brake shall be designed to be of sufficient size and strength to stop andhold the car at rest with rated load. The brake should be capable of operationautomatically by the various safety devices current failure and by the normal stoppingof the car. The brake shall be released electrically. It shall also be possible torelease the brake manually, such released requiring the permanent application ofmanual force so as to move the lift car in short stops. For this purpose suitable brake

release equipment wherever necessary shall be supplied with each lift installationand the same shall be kept in safe custody to prevent misuse.

The Brakes shall be fitted with adjustable and renewable Brake Shoes. The SafetyBrake Gear shall be capable of Repeated Operation without adjustments and shalloperate without damage to, or distortion of guide rails. Band Brakes shall not beused. Brake Linings shall be secured to the Brake Shoes that normal wear shall notweaken their fixings. No Earth Fault, Short Circuit or Residual Magnetism shallprevent the Brake from being applied in the even of Loss of Power Supply to theElevator Motor & Control Circuit.

A Means of adjusting the Brake Plunger Stroke and releasing the Brake in

Emergency shall be provided.

The Elevator Machine shall be fitted with a Manual Emergency Device Capable ofhaving the Brake released by hand and requiring a Constant effort to keep the BrakeOpen.

3.3.3.6 Alignment

The Brake Plunger , Sheaves and all Bearings shall be mounted & assembled so thatProper Alignment of these parts is maintained.

3.3.3.7 Anti-Vibration SupportsThe Whole Traction Machine shall be mounted on appropriate Anti Vibrationsupports to minimize noise and vibration

3.3.4 Hand winding wheel or handle :

At times of lift stoppage due to any reasons, it shall be possible to move the lift car tothe nearest landing manually. The manual operation shall be by means of windingwheel or handle mounted on the end of the motor shaft. The up or down direction ofthe movement of the car should be clearly marked on the motor or at suitable

location. A wearing plate written in bold signal red colour advising the maintenancestaff to switch off the mains supply before releasing the brake and operating thewheel is to be prominently displayed.


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3.3.5 Bearings :

Bearings shall be either of anti-friction metal sleave type with oil reservoirs, self,lubrication, oil gauges, capped filler openings and drains of the ball roller or sinteredtype subject to oil flood lubrication or grease lubrication.

Grease lubricated bearings shall have grease gun connections and drain plugs. Thebearings and lubricant reservoirs shall be dust tight and shall incorporate effectiveseals to prevent leakage. The outer end of the bearings shall be closed with aremovable oil tight plate. Thrust bearings shall be of the ball or roller type and shallhave two sets of balls or rollers arranged to minimize backlash for efficient working.

Bearings shall not Leak Oil & shall be Dust-Tight, & Self Lubricating.

3.3.6 Type of control :

3.3.6.1 Variable Voltage Variable Frequency :

Incoming mains AC power is first rectified to DC and then inverted to providecontrolled AC current to the elevator drive. Precision monitoring of motor speed andcar direction, position and load enable the pulse width of the AC power supplied tothe motor to be adjusted to ensure that elevator speed is maintained very accuratelyto an ideal profile.

Thus in VVVF controls pulse width modulation control of AC motors has followingadvantages compared with the older servo controlled elevators :-

a) Total control at all stages of the motion cycle.b) A consistent fully adjustable smooth ride.c) Better levelling accuracy under all conditions.d) A higher power factore) Lower starting current.f) Energy saving through reduced power consumption.

3.3.7 Installation Aspects :

a) Installation in Machine RoomLift Machine Room to accommodate the drivemachinery, controller, etc., shall as far as possible be located on top of the liftshaft. The layout of equipment there should be such as to allow free

movement of maintenance personnel inside. Machine room shall not be usedfor storage purpose.

b) Air Conditioning of Machine Rooms- Machine Rooms shall either be Air-Conditioned or non air conditioned according to the requirement. Heat LoadDetails shall be furnished by the Elevator Contactor.

c) Vibration, Isolation Vibration and isolation arrangement shall be provided toprevent transmission of vibration to the building and structure.

3.3.8 Guide Rails : -

Guide rails shall be in accordance with clause 3 of IS 14665 (Part 4Sec 2) 2000.Only machined guide rails shall be permitted for cars. Formed sheet metal rails shallbe used up to speeds of 1.75mps for counter weight applications. In the case of


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Freight Lifts, un machined guides rails shall be permitted for the counterweight for allspeeds and for the cars only up to a speed of 0.5m/sec.

The guide rails shall be continuous throughout the entire travel and shall withstandwithout any deformation the action of safety gear with a fully loaded car.

Generally the guide rails shall be supported by brackets secured to the hoist way

frame at each floor. The rails shall be securely fastened to the brackets or othersupports by approved heavy rail clamps. All necessary guide rails packing oradditional supports shall be provided to prevent guide rail deflection and stressesexceeding the prescribed limits. The stresses on the guide rail due to the horizontalforces imposed on it during loading, unloading and running calculated without impact,shall not exceed 5mm. the guide rail brackets, their fastenings and supports shall becapable of resisting the horizontal forces mentioned above, with the total deflection atthe point of support not in excess of 3mm.

Guide rails shall extend from pit floor to the underside of concrete slabs or grafting attop of the lift well. They shall be erected in plumb and parallel with a maximumdeviation of 3mm. All shimming required shall be of metal securely held in place.

Jointing plates shall be so located as not to interfere with supporting clamps andbrackets. The bolts shall be used with spring lock washers. The guide rail anchoragepit floor must be made without puncturing the water proofing. The expansion joints inthe guide rails shall be so designed as to avoid jerks in the lift car. Machined guiderails shall have finished surfaces which shall be coated with corrosion preventivecompound which shall be maintained till the commissioning of the installation.Before the car is placed in operation, the preventive coating shall be removed andthe guide rails thoroughly cleaned and smoothened.

There shall be a minimum of two brackets per piece of Guide Rail and distancebetween brackets shall not be more than half the Length of each piece of Guide Rail.Guide Rail brackets shall be of Steel & bolted securely to the building or structure

steel works. The bracket shall be designed & located such that the Rail will notdeflect more than 5 mm Under normal Operation. The Guide Rails shall beconnected by Steel Fish Plates.

The Rail Contact surfaces of the connecting Rail Plates & back of the guide Railends shall be accurately machined & fitted at site to form smooth joints.

The stem sections of all guides shall be tongued and grooved to provide matchedjoints. The guides & their fixings shall be able to withstand the forces imposed by afully Loaded Car Travelling at or higher than the tripping Speed of the Governor, dueto the application of the Safety Gear, without permanent deformation or bending dueto the Uneven Loading of the Car. The Guide Rail Brackets shall be Hot DippedGalvanized.

3.3.9 Lift Car

3.3.9.1 Car Frame

The car frame shall be in accordance with clause-4 of IS 14665 (Part 4-Sec 3) : 2001made of Hot Dipped or Spray Galvanized Cold Rolled Steel of rigid construction towithstand without permanent deformation the operation of safety gear. The car shallbe so mounted on the frame that vibration and noise transmitted to the passengersinside is minimized. The Deflection of the Members carrying the Platform shall not

exceed 1/1000

th

of their Span Under Static Conditions with the Rated Load Uniformlydistributed over the Platform. It shall not Transfer Load to Enclosure. The SafetyFactor of the Frame shall not be less than 5.


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3.3.9.2 Car Platform

a) The car platform shall be of framed construction and designed on the basis of ratedload evenly distributed. The dimensions shall conform to IS:14665 (Part-1) 2000unless otherwise specified. The flooring shall be smooth and of anti-skid surface.The flooring for goods lift shall be strong enough to take the rated load without any

deformation or damage.

b) A load plate along with overload alarm, giving the rated load and permissiblemaximum number of passengers should be fitted in each lift car in a conspicuousposition. The Car Platform shall be constructed from Hot Dipped or SprayGalvanized Cold Rolled Steel. Minimum safety Factor shall be 5. Car Platform shallbe insulated to prevent the transmission of Noise and Vibration from the Car Frameto the Platform.

3.3.9.3 Car Body

Car Body shall be made of Vandal /scratch proofResistant Stainless Steel of Min.

Thickness 1.5 mm. The Design of Final Finishes of the walls, Ceiling and Floor isSubject to the acceptance of the Employer.

It shall be insulated to prevent the transmission of Noise and Vibration from the carFrame.

The car shall be enclosed on all sides by a metallic enclosure. The enclosureincluding the door shall withstand without deformation a thrust of 35 Kg appliednormally at any point and as per IS 14665 (Part 4/ Sec 3)-2001. Ventilation openingsif specified shall be as per IS 14665 (Part4/Sec 3) - 2001.

a) Stretcher guards/ trolley guards made of PVC/Rubber extrusion housed in a stainless

steel beading shall be fitted at suitable level (s) to rear/ side panels for Passengercum Goods Lifts (Service Lift) (Service Lift).

b) Lift Car door shall have a fire rating of one hour.

3.3.9.4 Car Roof

The roof of the car shall be capable of supporting a weight of at least 140 Kg and asper IS 14665 (Part-4 Sec3) : 2001. The Car Roof shall be suitably Constructedwith Galvanized Sheet Steel & reinforced to permit the Maintenance & Inspection ofthe Elevator Shaft equipment to be carried out by Maintenance Personnel standingon the Car Roof. Perforated with Mesh Construction of the Roof or Wooden Platformon the Car Roof shall not be acceptable. The Car Roof shall be fitted with GuardRails set as at a height and of suitable dimensions and strength to ProtectMaintenance Personnel.

3.3.9.5 Car Thresholds

Car entrance shall be provided with metal thresholds having a grooved surface.Thresholds for lifts having horizontally sliding car doors or gates shall have machinedor extruded guide grooves.

3.3.9.6 Toe Guard Aprons

The toe guard apron of gauge not less than 1.6mm of Galvanized sheet steel may beprovided extending at least 15mm beyond entrance jambs at each side. The guards


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shall have a straight vertical face extending below the level of the finished car floorand not less than the depth of the leveling zone plus 7.5mm. The bottom of guardshall extend 700mm for lifts up to speed of 1.5 mps below vertical face and beveledat 15o angle from the vertical. It shall be seemed to car platform construction and bereinforced and braced. The Depth of the Toe Guard shall be sufficient to prevent anyobject from being trapped between the Underside of the Car Platform and theLanding during Re-Leveling Operation .

3.3.9.7 Clearance

The clearance between the top of the car and the soffit of the lift shaft roof, bottom ofthe car and the pit floor, the buffers etc., and the clearance between the car and thelift well, between the car and the landing sill, between two lift cars in the same shaftetc. shall be provided as per IS 14665 (Part 1, 2 & 4) and relevant lift rules mentionedin Appendix-I.

When the Car rests on its fully Compressed Buffer, no part of the car or anyequipment attached thereto shall come into contact with any part of the Pit or anyPart of the equipment located therein.

When the car rests on fully Compressed Buffer, there shall be a vertical clearance ofat least 600 mm between the Pit Floor and the Lowest structured/ Mechanical Part,equipment or device installed beneath the car platform except Guide Shoes orRollers, safety assemblies & platform apron, guards or other equipment. Theclearance between the Car/Counter weight & the hoist way enclosure shall be atleast 20 mm except on the side for Loading & Unloading. The Clearance betweenthe counter weight & counter weight screen shall be at least 20 mm. The Clearancebetween Car & Counter weight shall be at least 25 mm.

3.3.9.8 Car Apron, Landing Thresholds and Sills

An apron shall be fitted to the car platform such that no dangerous gap exist at anytime when the landing door is opening, Thresholds and sill plates shall be provided atthe landings also. The distance between landing sill and the sill on car platform shallnot be more than 30mm.

3.3.9.9 Inter-communication System

a) Though para 8.4.3 of IS 14665 (Part 2/ sec 1) : 2000 recommends forprovision of either an emergency signal or a telephone inside the car but as ageneral experience, it is seen that over a period of time these devicesbecome inoperative due to one reasons or the other. Therefore, in order tohave at least one device of communication functioning at all the times, analternative arrangement in terms of provision of both i.e. telephone withminimum three connections - one at the BMS Control Room , Second atSecurity Control and the third in machine Room shall be made. Emergencysignal with re-chargeable batteries as source of supply shall be made in thelift cars.

b) The device used for emergency signals should incorporate a feature thatgives immediate feed back to the car passengers that the device has workedproperly and the signal has been passed on the intended agency. This shallbe achieved by pressing of bottom from control room which shall give audiosignal to the passengers in the car.

c) Provision of group indicator panel in the control room shall be made toindicate working of lifts.


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d) Emergency Power Supply for Lift Car

This shall include suitable secondary battery with trickle/ boost chargearrangement and invertor power pack with necessary contactors for supplyingthe light fixtures in the lift car. The same battery shall also feed the alarm belland communication equipment.

3.3.9.10 Ratings, Instructions and Lift License

Inside the lift car, the lift supplier shall also provide a stainless steel metallicplate indicating the rated load and detailed instructions for the passengers.This shall be mounted at a suitable place. There shall be provision to displayLift License, where License can be simply inserted in a Lift License Holder.

3.3.9.11 Lift Car Interior Finish

The side, rear and facia panel shall be of metal, flush mounted and dulyfinished to match the car interior decor and shall contain all the devices as

may be specified depending upon the type operation required. In additionseparate illuminated panel for indicating the floor and direction may beprovided on the top or the door way. All switches shall be fade proof and thedevices shall be suitable quality.

Each device and its operating position shall be legible fade proof and marked.

Car Interior & Elevator Finishes-

Unless specified elsewhere in this Specification, the following finishes for theElevator shall be applied of:-

a) Landing Finishes

i) Landing Transom Panels - Combination of Vandal Resistant

/ scratch proof Stainless SteelGrade 304 & other StainlessSteel finish to be chosen byArchitect

ii) Architrave (Jamb) - Combination of Vandal Resistant/ scratch proof Stainless SteelGrade 304 & other Stainless

Steel finish to be chosen byArchitectiii) Landing Doors - Combination of Vandal Resistant

/ scratch proof Stainless SteelGrade 304 & other StainlessSteel finish to be chosen byArchitect

b) Car Finishes

i) Car Transom Panels - Combination of Vandal Resistant/ scratch proof Stainless Steel

Grade 304 & other StainlessSteel finish to be chosen byArchitect


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ii) Car Door Frame - Combination of Vandal Resistant/ scratch proof Stainless SteelGrade 304 & other StainlessSteel finish to be chosen byArchitect .

iii) Car Wall

1. Front Panels - Combination of Vandal Resistant/ scratch proofStainless SteelGrade 304 & other StainlessSteel finish to be chosen by

Architect .

2. Side Panels - Combination of Vandal Resistant/scratch proofStainless SteelGrade 304 & other Stainless Steel

finish to be chosen by Architect.

3. Back Panels - Combination of Vandal Resistant/ scratch proof Stainless SteelGrade 304 & other StainlessSteel finish to be chosen byArchitect.

Joints in all surfaces shall be coordinated. All Fixings to be of the hiddensecret type (Cover strips at Joints are not acceptable)


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c) Car Doors - Vandal / scratch proofResistantStainless Steel Grade 304.

d) Car Floors 15 mm Thick Granite(Panoramic & Passenger Lifts& PVC Flooring in case ofFreight cum Passenger Lift.

e) Car Ceiling - Vandal Resistant / scratch

proofStainless Steel of SS 304Grade Panels. Other CeilingDesign to be Coordinated.

f) Car Kick Plates & Skirting - Vandal Resistant / scratchproofStainless Steel of Grade

SS 304 Type.g) Hand Grip Rail - Vandal Resistant / scratch

proofStainless Steel of GradeSS 304 Type.

All Car Interiors/Architrave, doors and interfaces with Civil Structure & Finishes shallbe subject to the acceptance of Employers Representative.

All Stainless Steel Materials of Car & Doors shall be of grade SS 304 Type.

3.3.9.12 Car and Landing Entrances

3.3.9.12.1a) The car and landing doors shall be flush type Vandal Resistant Stainless steel only

for power operation. The flush type may further be of single sliding, centre opening.Power operated car and landing doors shall be so designed as not to injure anyperson during their closure by means of provision of a safety pressure switch whichshall cause the doors to reopen on the slightest pressure. In case of power operated

doors, it shall be possible on power failure, to open them from the car side. The dooropening and closing shall be accomplished smoothly and quickly without unduenoise, vibration and shock and their movements shall be cushioned and checked atboth limits.

The car door shall be centre opening horizontal sliding stainless steel VandalResistant Type.

b) A potential cause of accidents could be the attempts made to open the landing doorlock of lower floor in case the car stops away from floor level due to power failure.Since the car door can be opened in case of power failure so as to improve theventilation and avoid claustrophobic situations etd. As outlined in IS 14665 (Part

2/Sec 1) : 2000 para 10.9.1, there is a tendency among trapped passengers to makeattempts to open any accessible landing door. This attempt in panic may result inaccidental fall into the lift pit. In order to ensure that the trapped passengers do notattempt landing door, the electromechanical latch should be so designed that it isinaccessible or invisible to the passenger in the car.

c) In order to avoid accidental closure of doors while boarding or alighting the car,tamper proof infrared curtain covering almost the entire height of the door should beprovided in the lift doors.

The Doors shall be able to Withstand horizontal or lateral load according to IS 14665(Part 4 /Section 6) 2001.

3.3.9.12.2 Landing Doors


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Each landing door shall be complete with locks, headers, sills, frames, rims, hangersupports with cover plates, facia plates etc. The finished works shall be strong, rigidand neat in appearance. Plain surface shall be smooth and free from warp or buckle.Moulded surfaces shall clean out, straight and true. Fastenings shall be concealedfrom the face side of the material. Steel Sills shall be provided with a suitable nosingof approximately 25mm depth on the shaft side.

The opening for the landing gates or doors shall not be wider than that of the lift car.

Landing Doors shall be made of Vandal Resistant Stainless Steel Grade 304.

3.3.9.12.3 Car Landings

a) For the purpose of identification, the lift number should be displayed outside thelanding door, inside the car and in the machine room. This numbering may be usedas reference for the purpose of routine/ preventive maintenance, for operating frommachine rooms and reporting of any incidents etc.

b) Instructions

Detailed instructions for Lift Operations & Passenger Safety including Dos & Dontsspecified for guidance of passengers of shall be prominently displayed inside andoutside the car at all landings.

c) It is seen generally, that though the instruction on DOs and Donts, as per provisionof the relevant IS, are displayed in lift cars but the same are either displayed ininconspicuous location, or are very small in size or are in one language only. Tomake these instructions serve the intended purpose, and not a mere compliance ofrelevant IS clause; that these instructions should be displayed at a conspicuouslocation with larger and understandable script and should be written in English

3.3.9.13 Door Hangers and Rollers

Both car and landing doors shall be fitted with sheaves type door hangers.The sheaves wheels shall be tyred with as sound attenuating material andshall rotate on a grease packed precision ball bearing. The up thrust of thedoor shall be taken by a roller mounted underside to the hanger track.

The roller shall be mounted on an eccentric stud to provide for adjustment.Alternately, any other approved device for door adjustment may be used. Thehanger tracks shall be of either formed cold rolled steel or cold drawn steel of

heavy section with surfaces shaped to conform to the tread of the hangersheaves and rollers. Suitable means shall be used to transmit motion formone door panel to the other.

3.3.9.14 Door Operators

The door operator for each Elevator shall consist of a motor, operatingmechanism, linkages and switches to give adjustable or variable speed dooroperation and shall be adjusted to ensure smooth, fast opening and closing.The average door speed shall be as per IS/IEC Standards. The car andlanding doors shall operate simultaneously and quietly while the Elevator caris leveling.

Stainless cover of not less than 1.5mm thick minimum or other suitablearrangement with Employer Representatives approval shall be provided for


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the car and landing door headers to prevent the door locking devices, doortracks and mechanism from accumulation of dust.

For Elevators on Without Attendant control the doors shall close after theexpiration of a preset time interval or when a car call is registered. This presettime shall be adjustable from 0 to 30 seconds. The Door Open button shallre-open and reset the door opening time when pressed. The Door Close

button when pressed shall close the door immediately regardless of the timeinterval.

For Elevators on With Attendant operation, the car and landing doors shallopen automatically but the closing of doors will be subject to the pressure onDoor Close button. During the closing motion it shall be possible to reversequickly and open the doors by pressing of the Door Open button.

The door lock shall prevent the car doors from being opened by the dooroperator or by force when the car is moving or is not stopped within theunlocking zone of a landing. Electric interlocks shall be provided to ensurethat elevator will not operate , if the car door is not closed and locked. If the

car door is forced open, the Elevator shall stop and the alarm activated (evenwhen the Elevator is out of order) until the door is fully closed. The alarmsignal shall be sent to the relevant landing as well as to Control Room.

3.3.9.15 Door Safety Devices

3.3.9.15.1 Electrically Operated Proximity Detection Device

Electrically Operated Proximity detection device(s) shall be installed onthe leading edge of the car doors . The Device(s) shall create a threedimensional zone of protection for the entire height of the dooropening. This Zone of Detection shall extend a short distance in front of

the landing doors. The zone of detection shall move forward as thedoors close and the presences of a person , if within this zone , shallactivate the detector to stop the closing movement of the doors and re-open them before hitting the person. After a preset time interval (whichis programmable) the doors shall start to close again in the absence offurther interruption. A Passenger entering or leaving the car shall notcause the doors to stop and re-open unless the doors reaches a certainpredetermined proximity to the passenger.

If the door are prevented from closing by the pressing of hall and or carbuttons or a person in their path fro an adjustable preset time , the

safety devices except the mechanical door safety edge, shall berendered inoperative to cause door reversals , the door shall proceed toclose at a reduced speed and a buzzer located on the car shall soundbefore and during the closing.

3.3.9.15.2 Photo Cells

Two Photo Cells shall be provided for each car for preventing doorclearing when a passenger is entering or leaving the car. This shouldact as a backup protection to 3D Infrared curtain.

3.3.10 Levelling


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All lifts shall be incorporated with suitable floor levelling devices. In case of lifts withautomatic power operated doors and with A.C. VVVF controller a separate leveldevice for automatic levelling with levelling accuracy of + 5mm shall be incorporated.

3.3.11 Counter Weight

a) The counter weight for lift cars shall be in accordance with clause 6 of IS 14665 (Part

4-Sec-3) : 2001 and shall be designed to balance the weight of empty lift car plusapproximately 50 percent of the rated load. It shall consist of cast sections firmlysecured in relative movement by at least two numbers steel tie rods having locknuts/split pins at each end and passing through each section and Housed in a rigidsteel frame work. Cracked and broken sub weights shall not be accepted. CounterWeights shall be of Uniform density and Physical Dimensions.

b) Counter Weight Guards

Stainless Steel Guards shall be provided in the lift pit to a suitable height above thepit floor to eliminate the possibility of injuries to the maintenance personnel.

3.3.12 Guide Shoes

Two numbers of guide shoes at the top and two numbers at the bottom shall beprovided on the lift car and counter-weight. Guide Shoes having non-metallicrenewable linings requiring minimum lubrication shall be provided.

3.3.12.1 Type of Shoes

a) For passengers lift and freight -cum-passengers lifts

For speed upto 1.5mps sliding guide shoes shall be used. Sliding guideshoes for car shall be always flexible and for counterweight solid guide shoes

can be used upto 1.0mps. For speeds more than 1.5mps roller guide shoes shall be used for car and

counterweight.

b) For Freight lifts solid shoes can be used.

3.3.12.2 Flexible type/solid type sliding guide shoes

The car shall be provide with solid or spring loaded swiveling guide shoes withrenewable liners, where the lift car speeds are upto and including 1 MPS. The carswith speeds beyond 1 MPS shall be provided with spring loaded guide shoes withrenewable liners or the guide shoes shall be of roller type.

3.3.12.3 Roller type guide shoes

Each roller type shoe shall be of an approved type consisting of rollers assembled ona substantial metal base and mounted as to provide continuous contact of all rollerswith the corresponding guide rail surfaces under all conditions of load and operation.The rollers shall run on the three finished guide rail surfaces and shall operatequietly.

Each Roller Guide shall consist of three wheels tyred with Polyurethane or a durable

resilient materials, each rotating on ball bearing having sealed in lubrication,assembled on a substantial metal Base. They shall be so mounted as to providecontinuous contact of all wheels with the corresponding Rail surfaces under all


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condition of Loading & Operation. The wheels shall run on three finished Railsurfaces. The contractor shall provide a means of adjustment of spring pressure andof Play between shoes & Guide Rails.

The Roller Guides shall run on dry guide Rails. Sheet Metal Guards shall beprovided to protect the wheels on Top of the Car & Counterweight. The RollerWheels for the Car shall not exceed 500 RPM and the Roller wheels for the

counterweight shall not exceed 1000 RPM at Rated Speed.

The Car & Counterweight are to be statically Balanced following fitting of all itsequipment and finishes prior to fitting the guide shoes.

a) Mounting of guide shoes

Guide shoes shall be provided with adjustable mountings & shall be rigidlysecured in accurate alignment at the top and bottom on each side of the carsling and counter weight frame construction. When oil buffers attached to thebottom of the counter weight are used, additional guide shoe shall beprovided on each side of the buffer same. The design of guide shoes and car

safety devices shall be coordinated so as to ensure the provision andinstallation of equipment with clearance specified in Clause 2.10 (VIII) of thisChapter.

3.3.13 Lift Ropes IS 14665 (Part 4 / Sec 8)-2001

Round strand steel wires ropes made from steel wire ropes having a tensile strengthnot less than 12.5 tonnes/cm2 and of good flexibility shall be used for lift.Lubrications between the strands shall be achieved by providing impregnated hempcore. The lift ropes shall conform to IS 14665-(Part-4-Sec. 8):2001. The minimumdiameter of rope for cars and counter weight of passenger and goods lift shall be8mm, and shall confirm to IS 14665 (part 4/Sec.8) including all amendments. No. of

Ropes Specially Manufactured for Elevator use shall be employed for suspension ofElevator Car & Counterweight as per IS 14665. At least three Steel Wire Ropesspecifically manufactured for Elevator use, shall be employed for the suspension ofElevator car & counter weight.

Rope speed of Passenger & Passenger cum GoodsLifts (Service Lift) (m/s)

Factor of safety

0.5 or less 8exceeding 0.5 to 1.0 8.6exceeding 1.0 to 2.0 10exceeding 2.0 to 3.5 11exceeding 3.5 12

For Car & Counter weight Ropes, however , Factor of Safety based on MaximumStatic Load shall be at least 12.

i) Rope fastenings

The ends of lift ropes shall be properly secured to the car and counter weight hitchplates as the case may be with adjustable rope shackles having individual tapersbabbit sockets, or any other suitable arrangement. Each lift rope shackle shall befitted with a suitable shackle spring, seat washer, shackle nut & lock & shackle nutsplit pin.

ii) Guards for Lift Ropes


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Where lift ropes run round a sheave or sheaves on the car and/ or counterweight ofgeared/ gearless machine suitable guards shall be provided to prevent injury tomaintenance personnel.

iii) Number & Size of Ropes

The contractor must indicate the number and size of lift ropes and governor ropes

proposed to be used, their origin, type, ultimate Tensile strength and factor of safety.The contractor should furnish certificate or ropes from the rope manufacturers issuedby competent authority. Type Test & Routine Test Certificates shall be furnished.

A Plate giving the Number, Size & Ultimate Tensile Strength of the Rope used shallbe permanently fixed to the Cross Head.

Before Installation, Manufacturers Certificate shall be supplied for each set ofHoisting Ropes with the following data:

a) Type of Wire Ropeb) The Diameter in MM

c) The Manufacturers RatedBraking Strength

d) The Month & the YearRopes were manufactured.

e) The Manufacturers Name

The Factor of Safety based on Maximum Static Load for Car & Counter weight ropesshall be at least 12.

The Ropes shall be attached to dead end Hitch assemblies, fitting to supportingbeams, car Frames, Counterweights by means of suitable Rope Termination. ALocking Device or Anti-Twist Rope Device shall be fitted to the Roping System.

3.3.14 Safety Equipments :

Every lift installation shall necessarily be provided with the following safety featuresand as per Appendix-VII:- CVC Report:

3.3.14.1 The safety gear shall be provided in accordance with IS 14665 (Part-4-Sec.4):2001, each type of car safety shall be actuated by a speed governor.

3.3.14.2 Governor the car safety shall be operated by speed governor located overheadand driven by governor rope suitably connected to the car and mounted on itspulleys. The rope shall be maintained in tension by means of weighted or springloaded tension sheaves located in the pit. Governor shall be provided for lifts with atravel of more than 5.5 meters. The governor rope shall be not less than 6mm in diaand shall be made of steel or phosphor bronze. These shall be in accordance withIS 14665 (Part4/sec-4):2001. Governor for car safety gears shall be adjusted toactuate the safety gear at the following speeds :-

For rated speeds upto 1 m/s maximum governor tripping speed shall be either 140percent of rated speed or 0.88 m/s, which ever is higher. For rated speed above 1m/s maximum governor tripping speed shall be 115 percent of the rated speed plus0.25 m/s.

Minimum governor tripping speed shall be 115 percent of the rated speed as per IS14665.


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3.3.14.3 The governor shall be of V groove wheel design and only wheel is stopped toactuate the car safety upon a pre-determined over speed downward withoutdamaging the rope.

iii) The governor, rope and sheave shall be so located so as to minimize danger ofaccidental injury to the equipment.

a) The governor sheave and tension sheave shall be according to Clause 2.3 and thesheave bearing shall be according to Clause 2.6 of this Chapter.

b) The requirements for field test on car safety and governor and for drop tests to slidingtype car safety shall be as specified in Annexure.

3.3.14.4 Terminal limit switches

a) Terminal switches

These shall stop the car automatically at terminal floors within the top and bottompermissible over travel. They shall act independently of the operating devices, the

ultimate limits switches and the buffers. They shall be in accordance with clause 8 ofIS: 14665 (Part 3-Sec 1) : 2000.

b) Terminal stopping devices located in shaft or in the car and operated by cams shallbe fitted with rollers having a rubber or other approved composition to provide silentoperation when actuated by the cam. When the lift car cross head is 60cm from thenearest obstruction above it, no projection on the car shall strike any part of theoverhead structure.

c) Lifts with speeds over 1.25 meters/ second shall have the normal terminal stoppingdevice located on the car or on the guide rails or in the machine room.

3.3.14.5 Ultimate Terminal Switches

These shall be provided in accordance with the statutory requirements and standingpractices. When provided these shall arrange to stop the car automatically within topand bottom clearances independently of the normal terminal switches but with thebuffer operative. These shall be in accordance with clause 8 of IS : 14665 (Part3/Sec 1)-2000.

3.3.14.6 Buffers (IS 14665 (Part 4/Sec 1) 2001)

Buffers shall be spring type or oil type orPU buffers.

Buffers shall be suitable for installation in the space available. Buffer anchorage atpit floors shall be installed avoiding puncturing of water proofing.

The partial compression of spring return oil buffers when the car is in level withterminal landing will not be acceptable.

All buffers shall be tested at manufacturers works and a copy of the test report shallbe submitted.

When the lift car rests on fully compressed buffers there shall be at least 60 cmsclearance between the lowest point in its car frame and any obstruction in the pitexclusive of buffers and their supports. Similarly when the lift car cross head is 60

cm from the nearest obstruction above it, no projection on the car shall strike any partof the overhead structure. The contractor must indicate the name of buffermanufacturers, buffer stroke & certified maximum loads.


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3.3.14.7 Door Locks

Electro-mechanical door lock shall be provided for all the landing doors and theyshall be such that the doors cannot open unless the car is at rest at the particularlanding. It shall not be possible to move the car unless all the landing doors and thecar door are closed and locked.

All the locks and contacts shall conform to IS : 14665 (Part 1/Sec 6)-2001 shall bepositive and pass the prescribed endurance and reliability test from a recognisedtesting laboratory. They shall be so located as to be inaccessible to un-authorisedpersonnel. The electromechanical latch should be so designed that it is inaccessibleor invisible to the passengers in the car.

Each Landing Door shall be provided with an accepted Locking & Interlocking deviceto prevent the Operation of the Elevator Unless all Landing Doors are Closed &Locked.

It shall not be possible to open the Landing Door from the Landing Side without a

Landing Door Key.

The Locking Device shall have at least IP 54 Protection.

The Electric Contacts of the Door Locking Device shall open positively independentof gravity.

Each Landing Door Panel shall be provided with its own locking device.

Provision shall be made for opening of all Landing Doors by means of a LandingDoor Key by an Authorized person irrespective of the position of Elevator Car.

3.3.14.8 Other Safety Devices

Besides these safety devices mentioned above, motor operated electro-mechanicalbrake (Clause 2.5) counter-weight guards ( Clause 2.13 (i) ) alarm bell, emergencydoor lock release operating key and associated safety and other requirements shallalso be included.

3.3.15 Simplex Selective-Collective operative with/without attendant

Automatic operation by means of one button in the car for each landing level servedand by up and down buttons at the landings, wherein all stops registered by themomentary actuation of the car made as defined under non-selective AutomaticOperation but where in the stops registered by the momentary actuation of thelanding buttons are made in the order in which the landings are reached in eachdirection of travel (irrespective of the sequence in which the buttons have beenactuated). With this type of operation, all up landing calls are answered when thecar is traveling in the up direction and all down landing calls are answered when thecar is traveling in the down direction, except in the case of the uppermost orlowermost calls which are answered as soon as they are reached in-respective of thedirection of travel of the car.

3.3.16 Group collective selective operation with / without attendantThe control system for this operation shall be similar to the one described under

simplex selective collective operation except that in this system there shall be morethan one lift cars with adjacent wells. It shall be arranged to coordinate all cars forefficient service and prevent them from answering the same calls by the provisions of


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two sets of landing call button fixtures one each between the two adjacent cars. Itshall automatically assign each call to the car that will be in the best position toanswer promptly. The system shall be so arranged that when the cars are idle,Normally two cars will be parked at the lower main landing with its doors closed oropen and the other two cars shall be parked with the doors closed or open to thelanding where it answered its last call, and one of it shall be the one to attend to thenearest call.

Each car shall always respond to calls registered by its own car call buttons. Besidesthe control system shall also be arranged for independent service from inside the car.

A by pass button (non-stop button) shall also be provided inside the car to enable theattendant to by pass any landing if the car is full or if otherwise so required.

The lifts shall be arranged with or without attendant operation and shall function asdescribed using single car selective collective operation. When the transfer switch isin the attendant position the operation of the cars shall be identical with thatdescribed for automatic operations except that :

a) Closing of doors and starting of cars shall be initiated by the car buttons onlyb) Buzzers and directional lights in the car are operative andc) Landing by pass shall be effective.

The pressing of an up or down landing call shall illuminate appropriate directionindicator in the car panel, which is to answer that call and if the doors are open shallalso sound buzzers as a signal to the attendant. If both cars are parked at the lowerlanding the above signals shall be given to the car which has been at the floor forlongest time.

3.3.17 Controlling EquipmentThe movement of the car shall be electrically controlled by means of a controller

located in the machine room.

3.3.17.1 Control CircuitsThe control circuit shall be designed to the type of lift specified for safety operation.It shall not be possible to start the car unless all the car and landing doors are fullyclosed and landing doors locked. The circuit shall have an independent fuseprotection for fault and over loads and be arranged so that earth fault or an opencircuit shall not create unsafe condition. The circuit shall be so arranged that for thestoppage of the car at specified landing or for actuation of a contactor by emergencyswitches or operation of safety gears the system shall not depend upto thecompletion or maintenance of an electrical circuit to cut off power supply and applythe breaks. This requirement is not applicable to dynamic braking and speed controldevices.

3.3.17.2 Terminal BoardsAll wiring for external control circuits shall be brought to a terminal board with meansof identification of each wire. Metallic/ plastic identification tags shall invariably beprovided. All connections of wires to terminal boards shall be adequately clamped orscrewed.

3.3.17.3 Auxiliary Switches

a) Emergency stop Switches :


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On top of the lift car an emergency stop switch shall be provided for use bymaintenance personnel. Stop switch shall be provided in the machine room.Operation of these switches/ buttons shall cancel all the registered calls and landingcalls for that particular lift.

b) Maintenance Switch on top of the Car:

For purpose of inspection and maintenance, maintenance switch shall be providedon top of the car. The control circuitry shall be so arranged that in the event of theoperation of this switch :

The car speed shall be less than the rated speed not exceeding 0.85 metres/ sec.

The car movement shall be possible only on the application of the continuouspressure on a button. It shall be so mounted to prevent any inadvertent operation.

c) Fireman Switch :Fireman switch with glass to break for access shall be provided at ground or mainfloor for all the lifts. The operation of this switch shall isolate/ or cancel all calls to all

the lifts and the lifts will stop at the next nearest landing if travelling upward. Thedoors will not open at this landing and the lifts will start travelling to ground floor. Ifthese were already travelling down, they will go straight to ground floor direct withoutstopping enroute. The Lift shall function as per the requirement of Fireman.

d) Inspection Facility :

An Inspectors change over switch and set of test buttons shall be provided in thecontroller. Operation of the Inspectors changeover switch shall make both the carand landing buttons inoperative and permit the lift to be worked in either directionfrom machine room for test purposes by pressing corresponding test buttons in thecontroller. It shall not however interfere with the emergency stop switches inside the

car or on the top of the car.

e) Safety Line Indicators :

If specified visual tell tele lights may be provided to monitor the conditions of faults inthe safety line of the lift for easier fault finding. These indicators will remain lit whensafety circuits are normal.

One indicator shall be provided for each safety on the controller. If any indicators failto light up as the lift proceeds in its sequence of operation, there shall be visualindication of the safety line open circuit and also its location for easier fault finding.

3.3.17.4 Wiring, Cabling, Earthing etc.

a) Wiring in Machine Room :

Power wiring between the controller and main board controller to various landingsshall be done in heavy gauge conduit or metal duct & shall conform to I.E. Rules1956 and CPWD. Specifications for electrical works. Following general principalshall be followed in wiring :

1) Control cables carrying DC and power cable carrying AC shall not be run inthe same conduit or metal duct and they shall be laid as per I.E. rules.

Metal duct with removable inspection cover shall be preferred.


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In case of control cables also the harness shall be separate as far as feasiblefor separate functions and laid separately in suitably dimensioned metal duct or in aseparate conduit such as the signaling, locking, lamp indication and safeties. Controlcables for different voltages in the lift installation works should be laid as per I.E.Rules.

2) At least 5 percent with a minimum of 5 unconnected spare wires shall be available

out of all the lines to be provided in the wiring harness from the midway junction boxto the machine room.

- Cables shall be laid by using GI Cable Trays & Race Ways suitably.- All conduits shall be of GI.

3) There shall be a master isolating switch fuse associated with the controller heavyduty load break, quick make, quick break, quick break type TP&N preferablyinterlocked with controller cabinet door. Isolator handle shall have provision forexternal locking in off position.

All relays shall be suitable for lift service and shall incorporate adequate contact wipe

for reliable operation. Relays shall operate satisfactorily between 80 percent to 110percent of their voltage.

Main motor contactors shall be suitable for A.C. duty. Tenderer shall be required tofurnish full details of make, type, applicable standard, voltage and current rating, dutyclass, type and routine tests done etc., on contactors and relays. Copies of type testcertificates and other test certificates shall also be furnished by the successfultenderer.

All cables shall be FRLS XLPE Type of appropriate sizes with copper conductors.The cables feeding motor and in heavy current flow paths shall be so selected thatthe size matches the protecting fuses and will not result in more than 2 percent

voltage drop from the main board to the terminals of motor. Control cables shall notbe less than 0.5 sq. mm. or equivalent if stranded; where installation of heavy gaugeconduits present difficulties, short lengths of flexible conduits will be permitted buteffective electrical continuity and earth bonding shall be ensured. Ferrules shall beslipped at the ends of all cables as per standard control wiring practice. All terminalblocks shall be suitably marked.

b) Trailing Cables :

A single trailing cable for lighting control and signal circuit is permitted, if all theconductors of this trailing cables are insulated for maximum voltage running throughany one conductor of this cable. The lengths of the cables shall be adequate to

prevent any strain due to movement of the car. All cables shall be properly taggedby metallic / plastic tags for identification.

Trailing cables shall run from a junction box on the top of the car to a junction boxlocated in the shaft bear mid point of travel and from these junction boxes conductorsshall be run to the various locations.

Trailing cables exceeding 30 meters in length shall run so that the strain on individualcable conductors will be reduced to a minimum and the cables are free from contactwith the car counterweight, shaft walls or other equipment.

Trailing cables exceeding 30 meters in length shall have steel supporting fillers andshall be suspended directly by them without rubbing over other supports.


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Cables less than 30 meters in length shall have no metallic fillers and shall besuspended by looping cables around supports of porcelain spools type or equivalent.

5 percent of the total capacity subject to a minimum of 5 wires shall b

Tender Doc for Elevator Works

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