DESIGN MANUFACTURE SUPPLY INSTALLATION TESTING AND COMMISSIONING OF A LOW HEADROOM MRL PASSENGER LIFT IN THE DC OFFICE MAIN BLOCK BUILDING AT DODA

Supply, Installation and Commissioning of Gearless Traction Machine (Low-Headroom, MRL Type)Providing and fixing compact permanent-magnet gearless traction machine suitable for low-headroom, machine-room-less passenger lift installation, compatible with rated speed of 0.63 m/s and rated load up to 400 kg. The machine shall be designed for installation within the lift shaft and mounted on suitable structural brackets/supports engineered to withstand seismic forces applicable to Seismic Zone V. The gearless machine shall be energy efficient, low noise and vibration type, suitable for frequent starts and stops, and capable of precise speed control and accurate leveling. The scope includes supply of traction sheave, electromagnetic brake system, encoder, thermal protection, mounting hardware, alignment, electrical termination, brake testing, and integration with the lift controller. The machine shall be factory tested, maintenance-friendly, and suitable for long-term reliable operation in public buildings.

Automatic Rescue Device (ARD)Providing, installing, testing and commissioning OEM-supplied Automatic Rescue Device suitable for gearless MRL passenger lift. The ARD shall operate automatically during mains power failure to move the lift car to the nearest landing and open the doors to allow safe evacuation of passengers. The system shall be battery operated, fully integrated with the lift controller, and capable of rescue operation without external intervention. The scope includes supply of maintenance-free batteries, charger unit, control logic, wiring, mounting, and testing under simulated power-failure conditions. The ARD shall be reliable, safe, and compliant with applicable lift safety standards.

Lift Car Frame, Platform and Enclosure (Complete Assembly)Designing, manufacturing, supplying, installing and commissioning the complete lift car assembly comprising car frame, car platform, and car enclosure suitable for a low-headroom, machine-room-less passenger lift installation. The car assembly shall be designed for a rated load up to 400 kg (≤6 persons) and optimized to fit within the fixed RCC shaft size of 1830 mm × 1830 mm while maintaining all statutory safety clearances. The car frame shall be robustly fabricated to withstand dynamic loads, starting and stopping forces, and seismic forces applicable to Seismic Zone V. The car platform shall be designed for uniform load distribution and shall be adequately stiffened to prevent deflection. The car enclosure shall be ergonomically designed for public use and wheelchair accessibility, ensuring adequate internal maneuvering space. The scope includes car roof, toe guards, lighting fixtures, ventilation fan, wiring within the car, and mounting of car operating panel and accessories. All components shall be factory fabricated, properly aligned during installation, and tested for safe and smooth operation.

Car Interior Finish, Flooring, Handrails & LightingProviding and fixing complete interior finishing of the lift car suitable for office and public use, including wall finishes, flooring, handrails, lighting and ventilation. The car walls shall be finished in hairline stainless steel (SS-304) panels, securely fixed to the car frame, providing durability, ease of cleaning and resistance to wear and tear under public usage. The car flooring shall consist of anti-skid PVC/vinyl flooring of lift-grade quality, fixed over suitable base to prevent movement or curling during service. Stainless steel handrails shall be provided on the side and rear walls at standard ergonomic height to assist elderly and wheelchair users. Adequate LED lighting shall be provided in the car ceiling to ensure uniform illumination, along with a low-noise ventilation fan for passenger comfort. All accessories shall be securely mounted and wired as part of the lift system.

Automatic Center-Opening Lift Doors – Car & Landings (All Floors)Providing, installing, testing and commissioning automatic center-opening lift doors for the lift car and all landings, suitable for a passenger lift serving Ground + 3 floors (4 stops). The doors shall have a clear opening width of 900 mm to facilitate wheelchair accessibility and smooth passenger movement. Door panels shall be designed for reliable operation with minimal noise and vibration, and shall be equipped with all necessary mechanical and electrical interlocks to prevent unsafe operation. The scope includes car doors, landing doors, frames, sills, hangers, door operators, and synchronization mechanisms. Doors shall be integrated with the lift control system to ensure smooth opening and closing and shall include emergency manual opening facility as per safety norms. Proper alignment and adjustment shall be carried out during installation to ensure long service life and safe operation.

Infrared / Multi-Beam Door Safety SensorsProviding, installing and commissioning infrared or multi-beam door safety sensors for automatic lift doors to ensure passenger safety during door operation. The sensor system shall detect obstructions in the door path and prevent door closing or reverse the door movement to avoid injury to passengers, particularly elderly persons and wheelchair users. The sensors shall be integrated with the lift door control system and shall operate reliably under varying lighting and environmental conditions. The system shall be tested during commissioning to demonstrate proper functioning under simulated obstruction conditions.

Car Operating Panel (COP)Providing and fixing Car Operating Panel complete with call buttons, digital floor display, emergency alarm button, intercom provision, and all associated wiring. The COP shall be ergonomically designed for public use, with buttons mounted at accessible height suitable for wheelchair users. Buttons shall be tactile and clearly marked. The digital display shall indicate floor position and direction of travel. The COP shall be fabricated from stainless steel and securely fixed to the car wall. The scope includes integration with the lift controller and testing of all functions.

Landing Operating Panels (LOP) at All FloorsProviding and installing Landing Operating Panels at each served floor, complete with up/down call buttons and digital floor position indication. LOPs shall be fabricated from stainless steel or powder-coated steel and shall be flush-mounted or surface-mounted as per site conditions. Buttons shall be durable, vandal-resistant, and suitable for public usage. The scope includes wiring, integration with the lift controller, labeling, and testing of all landing call functions.

Accessibility Provisions for Wheelchair UsersProviding and implementing all necessary accessibility provisions in the lift system to ensure comfortable and safe use by wheelchair users, in line with public building norms. This includes adequate door clear width, appropriate car size layout, ergonomic placement of COP and LOP buttons, provision of handrails, and non-slip flooring. The lift system shall be designed to allow easy entry, exit, and maneuvering of a standard wheelchair. All accessibility features shall be demonstrated during commissioning and verified for compliance with applicable norms.

Guide Rails for Lift Car (Supply, Installation & Alignment)Designing, supplying, erecting, aligning and commissioning T-section guide rails for the lift car, suitable for a low-headroom, machine-room-less passenger lift installation serving Ground + 3 floors. The guide rails shall be designed to guide the lift car accurately throughout its travel, ensuring smooth, vibration-free and safe operation under all loading conditions. The rails shall be of approved OEM standard size and section, capable of withstanding static and dynamic loads arising from car operation, emergency braking, and seismic forces applicable to Seismic Zone V. The scope includes supply of rail sections, fish plates, guide rail brackets, anchor fasteners, alignment tools, and all accessories required for proper installation. Rails shall be fixed to RCC shaft walls using approved anchoring methods, with spacing and fixing details as per OEM recommendations and applicable standards. Proper vertical and horizontal alignment shall be ensured during installation, and final alignment checks shall be carried out prior to commissioning.

Guide Rails for Counterweight (Supply, Installation & Alignment)Providing and fixing T-section guide rails for the lift counterweight assembly, complete in all respects. The counterweight guide rails shall ensure smooth, stable and noise-free movement of the counterweight throughout the lift travel. The rails shall be designed to withstand operational loads, emergency forces, and seismic forces applicable to Seismic Zone V. Installation shall include accurate alignment, secure anchoring to RCC shaft walls using approved brackets and fasteners, and proper joining of rail sections using fish plates. All rail joints shall be machined and aligned to avoid shocks or jerks during lift operation. The work includes testing and verification of smooth counterweight travel during commissioning.

Counterweight Frame and Filler WeightsDesigning, supplying, installing and commissioning the complete counterweight assembly for the passenger lift, including counterweight frame and filler weights. The counterweight shall be designed to balance the lift car and a portion of the rated load to ensure energy-efficient operation and reduced machine load. The counterweight frame shall be robustly fabricated to withstand dynamic and seismic forces, and shall be guided by T-section rails. Filler weights shall be cast iron or steel blocks, securely placed within the frame and properly locked to prevent movement during operation. The counterweight arrangement shall be side-mounted, optimized to suit the square shaft geometry and low-headroom configuration. Proper balancing shall be carried out during commissioning to ensure smooth operation and reduced power consumption.

Overspeed Governor & Safety Gear SystemProviding, installing, testing and commissioning overspeed governor and safety gear system complete for the passenger lift. The overspeed governor shall monitor the speed of the lift car and actuate the safety gear in case of overspeed conditions. The safety gear shall be mounted on the car frame and designed to safely grip the guide rails and bring the car to a controlled stop under emergency conditions. The system shall be factory tested and site tested as per statutory requirements. All components shall be properly calibrated and sealed as per Lift Inspector requirements.

Buffers at Lift Pit (Car & Counterweight)Providing and fixing polyurethane (PU) buffers at the lift pit floor beneath the lift car and counterweight, suitable for low-speed passenger lift operation (0.63 m/s). The buffers shall absorb impact energy in the event of over-travel, ensuring safety of the system. The buffers shall be securely anchored to the pit slab and aligned with the car and counterweight centerlines. The installation shall include all necessary base plates, fasteners, and alignment checks.

Pit Safety Equipment & AccessoriesProviding and installing pit safety equipment including pit stop switch, pit lighting fixture, convenience socket, ladder for pit access, and all associated wiring and accessories. These provisions are essential for safe maintenance and inspection activities. All equipment shall be installed in accessible locations and tested during commissioning.

Lift Control Panel (LCP) – Supply, Installation & CommissioningProviding, installing, testing and commissioning the complete Lift Control Panel (LCP) suitable for a low-headroom, machine-room-less passenger lift operating on 415 V, 3-phase, 50 Hz power supply. The panel shall house the microprocessor-based lift controller, VVVF drive, power contactors, protection devices, control relays, terminals, and necessary auxiliaries. The panel shall be designed to withstand voltage fluctuations prevalent at site and shall include phase failure, phase reversal, over-current, short-circuit, and over/under-voltage protection. The enclosure shall be floor-mounted or wall-mounted as per site conditions and located in a safe, accessible area near the lift shaft. The scope includes panel mounting, cable terminations, labeling, functional testing, and integration with all lift systems including ARD, fireman’s mode, COP/LOP, and safety devices.

Power & Control Cabling for Lift SystemProviding, laying, terminating, testing and commissioning all power and control cables required for complete lift operation, including cables from the main LT panel to the lift control panel, from control panel to machine, doors, COP, LOP, safety devices, and accessories. Power cables shall be appropriately sized XLPE insulated, armoured aluminium/copper conductors to limit voltage drop within permissible limits. Control and signal cables shall be multi-core, shielded type where required, with FRLS insulation. The scope includes cable trays/conduits, glands, lugs, ferrules, cable identification tags, and proper routing to avoid mechanical damage. All terminations shall be neat, secure, and tested for insulation resistance and continuity.

Earthing & Bonding of Lift SystemProviding, installing and commissioning complete earthing and bonding system for the lift installation to ensure electrical safety and compliance with statutory requirements. The scope includes earthing of lift machine, control panel, car frame, guide rails, door frames, and all metallic components within the lift shaft. Separate earth continuity conductors shall be provided and bonded to the building earthing system. Earthing connections shall be made using copper/GI conductors of adequate size with proper lugs and clamps. Continuity and earth resistance shall be tested and recorded. The system shall ensure effective dissipation of fault currents and protection of personnel and equipment.

Surge Protection & Power Quality Protection DevicesProviding and installing surge protection devices (SPD) and power quality protection equipment for the lift electrical system to safeguard sensitive electronic components against voltage surges, spikes, and transient over-voltages. The SPDs shall be installed at appropriate locations in the lift control panel and coordinated with existing building protection systems. The scope includes supply, mounting, wiring, testing, and commissioning of protection devices, ensuring compatibility with VVVF drive and lift controller.

Fireman’s Lift Mode – Electrical & Control IntegrationProviding, installing, wiring, testing and commissioning Fireman’s Lift Mode for the passenger lift as required for public buildings. The system shall include a Fireman’s switch located at the designated floor (normally ground floor), wiring, control logic integration with the lift controller, and necessary signage. Upon activation, the lift shall return to the designated floor, cancel normal calls, and operate only under fireman control as per safety logic. The system shall be tested under simulated emergency conditions to verify correct operation and safety compliance.

Emergency Alarm, Intercom & Car Emergency LightingProviding and fixing complete emergency communication and lighting system for the lift car, including alarm bell, two-way intercom connecting the lift car to security/office, and battery-backed emergency lighting. The system shall allow trapped passengers to communicate with building staff during emergencies and shall provide adequate illumination during power failure. All components shall be integrated with the lift control system and tested during commissioning.

The civil works under this job shall include minor and essential civil works required for installation of the passenger lift in the DC Office Main Block Building at Doda, including works necessary due to the absence of a top slab over the lift shaft. The scope includes construction of an RCC top cover slab / machine support slab over the lift shaft, of suitable thickness and reinforcement, complete with centering, shuttering, reinforcement placing, concreting, curing, and surface finishing, strictly as per approved structural drawings and directions of the Engineer-in-Charge. Structural design and approval of the slab shall be arranged by the department through a qualified structural consultant. In addition, the scope includes drilling, core cutting, chasing, grouting, epoxy anchoring, and patch RCC works required for fixing of guide rail brackets, door frames, buffers, and other lift accessories. Minor plastering, screeding, floor leveling, and making good of disturbed surfaces of walls, floors, and shaft interiors shall also form part of the work. The contractor shall ensure that all civil works are carried out without affecting the structural stability of the building. Major civil works such as shaft construction, pit deepening, structural alterations, or strengthening of existing members are excluded, except for the specifically defined top slab construction. All works shall be executed to the satisfaction of the Engineer-in-Charge.

Providing and fixing 4 kg ABC Type Fire Extinguishers for Lift AreaProviding and fixing portable ABC type fire extinguishers of 4 kg capacity each, suitable for extinguishing Class A, B and C fires, complete with wall mounting brackets, operating instructions, pressure gauge, safety pin, hose, and all accessories. One fire extinguisher shall be installed inside the lift car at an accessible and non-obstructive location, and one fire extinguisher shall be installed at the lift landing area outside the lift on each floor, including ground floor. The extinguishers shall be mounted on walls at a conspicuous and easily accessible location near the lift entrance.