GB/T 21739-2025Safety rules for the construction and installation of home lifts (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

This document replaces GB/T 21739-2008 "Code for Manufacturing and Installation of Home Elevators". Compared with GB/T 21739-2008, except for the structure...

Aside from adjustments and editorial changes, the main technical changes are as follows.

— The scope of application has been changed, and the content and requirements applicable to gear and rack driven home elevators have been removed (see Chapter 1, 2008). Chapter 1 (Year Edition)

— The term "building in use" has been changed to "existing building," and its definition has been revised (see 3.2, 2008 edition).

— The term and definition of "competent personnel" have been removed (see 3.3 in the 2008 edition);

— Added requirements for signs, markings, warnings, and operating instructions (see 4.1.2);

— Performance requirements under fire conditions have been changed (see 4.3, 4.4 in the 2008 edition);

— Noise requirements have been added (see 4.4);

— The protection requirements against harmful external influences have been removed (see 4.12 in the 2008 edition);

— The protection rating requirement for outdoor use has been removed (see 4.13 of the 2008 edition);

— The minimum channel requirement has been removed (see 4.14 in the 2008 version);

— The requirements for shafts and machine rooms have been changed (see 4.5.1.2, 5.1 in the 2008 version);

— Increased ventilation requirements for shafts and machine spaces (see 4.5.1.3);

— Added lighting requirements for shaft and machine space (see 4.5.1.4);

— Added requirement to install lighting control switches within the machine space (see 4.5.1.5.2);

— Added requirements for equipment hoisting (see 4.5.1.6);

— The strength and surface requirements for walls, floors, and ceilings have been changed (see 4.5.1.7 and 4.5.1.8, 5.7 in the 2008 edition);

— Increased access requirements for shafts and machine spaces (see 4.5.2);

— Requirements for access doors, access trapdoors, and maintenance doors have been changed (see 4.5.3, 5.8 in the 2008 edition);

— Added warning sign requirements for doors, trapdoors, and passageway doors leading to machine spaces (see 4.5.4);

— The sealing requirements for the shaft have been changed (see 4.5.5.2, 5.2.2 and 5.6.2.2 in the 2008 version);

— The structural requirements for the landing door and hoistway wall facing the car entrance of home elevators with car doors have been changed (see 4.5.5.3, 2008 version). 5.6.2.1.3 and 12.1.1);

— The protection requirements for the space below the shaft have been changed (see 4.5.5.5, 5.5 in the 2008 version);

— Added protection requirements for areas operating under heavy or counterweight conditions (see 4.5.5.6);

— The top-level space requirement has been changed (see 4.5.5.8, version 5.3 of the 2008 edition);

— The pit space requirements have been changed (see 4.5.5.9, 5.4 in the 2008 version);

— Added warnings and instructions regarding machine space requirements (see 4.5.6.2);

— Added requirements for machines to be located in the computer room (see 4.5.6.3);

— Increased requirements for machine protection, operating space, and marking within the shaft (see 4.5.6.4.1);

— Increased the size requirements for the working area within the shaft (see 4.5.6.4.2);

— Added requirements for the working area inside the car (see 4.5.6.4.3);

— The requirements for the machine's working area outside the hoistway have been changed (see 4.5.6.5.2, 4.3.2.3 in the 2008 version);

— The requirements for emergency and test operation equipment have been changed (see 4.5.6.6, 4.3.2.1 of the 2008 version);

— The ramp setup requirements have been changed (see 4.6.4, 6.4.6 in the 2008 version);

— The horizontal distance requirement between the manual car door sill and the landing door sill has been changed (see 4.6.5, 12.1.1.2 in the 2008 version);

— The mechanical strength requirements for landing doors and car doors have been changed (see 4.6.6.2, 6.4.7 and 7.13.2.7 in the 2008 edition);

— The requirements for powered doors have been changed (see 4.6.7.2, 6.4.3.4 and 6.4.10 in the 2008 version);

— Added a requirement for the door to open in reverse during the closing process (see 4.6.7.4);

— Added requirements for localized lighting at each floor (see 4.6.8.1);

— The car's instructions here have been modified (see 4.6.8.2.1, 6.4.8 in the 2008 version);

— The unlocking zone requirements have been changed (see 4.6.9.1, version 6.5.1 from 2008);

— The type testing requirements for landing door locking devices have been revised (see 4.6.10.1, 15.1.6 of the 2008 edition);

— Added type testing requirements for car door locking devices (see 4.6.10.2);

— Added requirements for the position of the triangular unlocking device (see 4.6.10.3.2);

— Added a common requirement for devices confirming the locked and closed status of landing doors (see 4.6.11);

— The requirements for mechanically connected multi-sliding landing doors have been changed (see 4.6.12, 6.8 in the 2008 edition);

— The requirements for mechanically connected multi-sliding or folding car doors have been changed (see 4.6.15, 7.13.2.9 of the 2008 edition);

— The requirements for opening the car doors have been changed (see 4.6.16, 7.13.2.4 and 7.13.2.10 in the 2008 version);

— The requirements for calculating the effective area of the elevator car in home elevators with doors have been revised (see 4.7.2.1.3, 7.3.2 of the 2008 version);

— The requirements for information displayed inside the car have been changed (see 4.7.2.2, 16.2.1.1 in the 2008 version);

— The mechanical strength requirements for the car walls have been changed (see 4.7.3.4, 7.5.2 in the 2008 version);

— The handrail height requirements for using glass car walls have been changed (see 4.7.3.6, 7.5.3.1 in the 2008 version);

— Added requirement for extendable footplates (see 4.7.5.3);

— The mechanical strength requirements for foot protectors have been changed (see 4.7.5.4, 7.8.3 in the 2008 version);

— The mechanical strength requirements for the car roof have been changed (see 4.7.6.1, 7.4.2 in the 2008 version);

— The installation requirements for the car roof kickboard have been changed (see 4.7.6.2, 7.4.4.2 in the 2008 version);

— The mechanical strength requirements for the car roof guardrail have been increased [see 4.7.6.5e];

— The handrail requirements have been changed (see 4.7.9, 7.10 in the 2008 version);

— The requirements for folding chairs have been changed (see 4.7.10, 7.11 in the 2008 version);

— The ventilation requirements for home elevators with car doors have been changed (see 4.7.11, 7.6 in the 2008 edition);

— The requirements for car lighting have been changed (see 4.7.12.1 and 4.7.12.3, and 7.12.1 and 7.12.3 in the 2008 edition);

— The requirements for emergency lighting in the car have been changed (see 4.7.12.4, 7.12.5 in the 2008 edition);

— The requirement for covering ropes and covering straps as suspension devices has been added (see 4.8);

— The requirement for drive sprockets has been removed (see 13.5.3.3 in the 2008 version);

— The traction requirements have been changed (see 4.8.3, version 13.6.6 of the 2008 edition);

— The protection requirements for traction sheaves, pulleys, sprockets, speed governors, and tensioners have been changed (see 4.8.6.1, 13.1.7.1 of the 2008 edition);

— Added requirements for anti-detachment devices (see 4.8.6.3);

— The provision regarding "clamping devices" in the mechanical anti-settlement measures for hydraulically driven home elevators has been deleted (see section 13.8.11.2 of the 2008 edition). 13.8.11.3);

— The requirement for safety clamp braking distance has been removed (see 10.1.1.3 in the 2008 version);

— Added requirements for a car accidental movement protection device (see 4.9.1.2, 4.9.1.3 and 4.9.7);

— The safety clamp release requirements have been changed (see 4.9.2.1.4, 10.1.3 in the 2008 version);

— The requirements for the structure and triggering method of the safety clamp have been changed (see 4.9.2.1.6.4, 10.1.2.1 in the 2008 version);

— The speed limiter triggering requirements have been changed (see 4.9.2.2.1, version 10.2 of the 2008 edition);

— Added requirements for triggering suspension failure (see 4.9.2.2.2);

— Added safety rope triggering requirements (see 4.9.2.2.3);

— The requirements for rupture valves have been changed (see 4.9.3, 13.8.7.5 of the 2008 version);

— Throttle valve requirements have been changed (see 4.9.4, 13.8.7.6 of the 2008 version);

— The requirements for the ratchet mechanism have been changed (see 4.9.5, 13.8.11.4 in the 2008 version);

— The requirements for the car's upward overspeed protection device have been changed (see 4.9.6, 13.6.7 of the 2008 version);

— The requirements for the forces acting on the guide rail and the method for calculating the guide rail have been changed (see 4.10, 9.4.3 in the 2008 edition);

— Added requirements regarding the placement of obstacles in the pit when the buffer is fixed to the car or counterweight (see 4.11.1.1);

— The requirement for top-mounted buffers has been changed (see 4.11.2, 2008 version 11.2), adding rows for car and counterweight buffers.

Process requirements (see 4.11.2);

— Added requirements for protection of accessible rotating parts (see 4.12.1.6);

— The speed deviation requirement has been changed (see 4.12.2, 13.1.8 of the 2008 version);

— The braking force requirements for electromechanical brakes have been changed, and monitoring requirements have been added (see 4.12.3.2.2.1, 13.2.2.1 in the 2008 version);

— Added requirements for cutting off the power supply to the brake [see 4.12.3.2.2.3a)2) and 4.12.3.2.2.3a)3)];

— The requirement for continuously manually opening the brake has been changed (see 4.12.3.2.2.7, 13.2.2.2 in the 2008 version);

— Added a requirement to move the car to a nearby floor when manually releasing the brake (see 4.12.3.2.2.9);

— The requirements for motor power supply and control have been changed (see 4.12.3.4, 14.8 of the 2008 version);

— Requirements for hydraulically driven home elevators have been revised (see 4.12.4, 13.8 of the 2008 edition);

— Electromagnetic compatibility requirements have been changed (see 4.13.1.1.3, 14.10 of the 2008 version);

— Added requirements for electrical operators (see 4.13.1.1.4);

— Added requirements for the location of control devices (see 4.13.1.1.5);

— Added requirements for component temperature and accessible equipment temperature limits (see 4.13.1.1.6);

— Added electric shock protection requirements (see 4.13.1.2);

— The insulation resistance requirement has been changed (see 4.13.1.3, 14.4.2.9 in the 2008 edition);

— The requirements for contactors and contactor-type relays have been changed (see 4.13.3, 14.7 of the 2008 edition);

— The protection requirements for electrical equipment have been changed (see 4.13.4, 14.13.1 in the 2008 edition);

— Added requirements for the location of the main switch (see 4.13.5.3);

— Added a requirement for a power cut-off switch for each input power supply (see 4.13.5.3);

— Electrical wiring requirements have been changed (see 4.13.6, 14.4.1.2 of the 2008 version);

— Added requirements for power control of lighting and sockets (see 4.13.8);

— The requirements for electrical safety devices have been changed (see 4.14, 14.9 and 14.12 in the 2008 edition);

— Added requirements for leveling and re-leveling control when doors are not closed or locked (see 4.15.1.3);

— The maintenance operation control requirements have been changed (see 4.15.1.4, 14.17.2 of the 2008 version);

— The emergency electric operation control requirements have been changed (see 4.15.1.5, 14.17.3 of the 2008 version);

— Added requirements for bypass devices for landing doors and car doors (see 4.15.1.6);

— Added requirements to prevent the home elevator from operating normally in the event of a door contact circuit failure (see 4.15.1.7);

— The requirements for electrical anti-settlement systems in hydraulically driven home elevators have been changed (see 4.15.1.8, 14.17.4 of the 2008 edition);

— Added requirements for automatic rescue operation devices (see 4.15.1.9);

— The requirements for the stopping device have been changed (see 4.15.1.10, 14.15.5 in the 2008 version);

— The limit switch requirements have been changed (see 4.15.2, 14.15.6 in the 2008 version);

— The priority requirements have been changed (see 4.15.4, 14.15.3 and 14.15.4 from the 2008 edition);

— Additional requirements for battery power have been changed (see 4.16, 14.14 in the 2008 edition);

— Added technical conformity documentation requirements (see 5.1);

— Design verification requirements have been added (see 5.2);

— The pre-delivery inspection requirements have been changed (see 5.3, 15.2.1 of the 2008 version);

— The requirements for the user and maintenance manual have been changed (see 6.2, 16.4 of the 2008 edition).