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A complete passenger lift specification covers standard dimensions, mechanical drive systems, structural shaft requirements, and core safety standards.

Standard sizing varies by building type and foot traffic:Capacity (kg / Persons)Typical Car Size (W × D)Door WidthRecommended SpeedTypical Building Application450 kg (6 persons)$1100 \times 1000\text{ mm}$$800\text{ mm}$$1.0\text{ m/s}$Low-rise residential / Private villas630 kg (8 persons)$1100 \times 1400\text{ mm}$$800\text{–}900\text{ mm}$$1.0\text{–}1.6\text{ m/s}$Standard apartment blocks & small offices800 kg (10 persons)$1350 \times 1400\text{ mm}$$900\text{ mm}$$1.0\text{–}1.75\text{ m/s}$Mid-rise commercial & residential1000 kg (13 persons)$1600 \times 1400\text{ mm}$$900\text{–}1000\text{ mm}$$1.6\text{–}2.5\text{ m/s}$Stretcher/accessible lift, hotels, office hubs1275–1600 kg (17–21 persons)$2000 \times 1500\text{ mm}$$1100\text{–}1200\text{ mm}$$2.5\text{–}6.0+\text{ m/s}$High-rise towers, hospitals, airports, malls2. Mechanical & Drive SystemsDrive Type: Gearless Synchronous Permanent Magnet (PMSM) Motor with Variable Voltage Variable Frequency (VVVF) inverter control for smooth acceleration and energy efficiency.Machine Room Location:Machine-Room-Less (MRL): Drive sits inside the shaft head room; preferred for modern low- to mid-rise buildings.Traditional Machine Room (MR): Drive located in a dedicated room directly above or beside the shaft; ideal for high-speed/high-rise applications.Door Configuration: Automatic side-opening or central-opening telescoping stainless steel doors.Power Requirements: 3-Phase, $400\text{V}/\text{415V}$, $50/60\text{ Hz}$ mains power, with single-phase $230\text{V}$ auxiliary lighting/control supply.3. Shaft & Structural RequirementsPit Depth: Typically $1100\text{–}1500\text{ mm}$ below the lowest landing floor to accommodate buffer stops and tension pulleys.Overhead Height (Headroom): $3600\text{–}4200\text{ mm}$ from top floor finish level to shaft ceiling.Shaft Tolerance: Plumb within $\pm 25\text{ mm}$ across the entire vertical rise.Shaft Construction: Reinforced concrete or steel frame with fire resistance rating (typically 1–2 hours).4. Essential Safety & Operational ControlsAutomatic Rescue Device (ARD): Battery-operated emergency system that safely lowers the lift to the nearest floor and opens doors during power outages.Infrared Door Curtain: Full-height light sensor beams to prevent doors from closing on passengers.Overload Protection: Visual and audible alarm that holds doors open if maximum weight is exceeded.Safety Gear & Governors: Progressive mechanical safety gear triggered by overspeed governors to lock the cabin onto guide rails if cable failure occurs.Firefighter's Emergency Operation: Returns lift directly to the main exit lobby upon signal from the building's fire alarm system.5. Compliance & International StandardsEN 81-20 / EN 81-50: European safety rules for lift construction and testing.ASME A17.1: Safety Code for Elevators and Escalators (North America).ISO 8100: International standard for lift design, safety, and performance.Accessibility Standards: ADA (US) / EN 81-70 (EU) specifying tactile/Braille buttons, voice synthesizers, handrails, and minimum doorway widths ($800\text{ mm}$ clear opening).