Rules for the improvement of safety of existing lifts
1 Scope
1.1 This document specifies the methods for improving the safety of existing lifts, with the aim of applying current safety technology to make existing lifts achieve the same level of safety as newly installed lifts.
Note: Due to the design condition of the building, it may be difficult to fully achieve the current safety level.
1.2 This document is applicable to permanently installed traction, forced and hydraulically driven passenger or cargo lifts.
This document can be used to improve the safety of existing lifts for the following personnel:
a) passengers;
b) maintenance and inspection personnel;
c) persons who may be affected by lifts around hoistways, machine spaces and between pulleys;
d) any other authorized person.
1.3 This document is not applicable to the following situations, but can be used as a reference:
a) Lifts other than the driving modes specified in GB/T 7588.1-2020;
b) Lifting equipment, such as chain bucket lifts, mine lifts, stage lifts, machinery with automatic cages and hoppers, construction lifts, marine lifts, offshore mining or drilling platforms, construction and maintenance machinery, or lifts in wind power towers;
c) Lifts with inclination angle between guide rail and plumb line greater than 15°;
d) Lifts (lifting platforms) with rated speeds less than or equal to 0.15 m/s;
e) Safety of operation during transportation, installation, repair and disassembly of lifts.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 7024 Terminology of lifts, escalators, passenger conveyors
GB/T 7588.1-2020 Safety rules for the construction and installation of lifts - Part 1: Passenger and freight lifts
GB/T 20900 Lifts (elevators), escalators and moving walks - Risk assessment and reduction methodology
GB/T 23821-2022 Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs
GB/T 24475 Remote alarm on lifts (elevators)
GB/T 24477-2009 Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs
GB/T24479-2023 Behaviour of lifts in the event of fire
GB/T 24480-2009 Landing doors fire resistance test - Methods for leakage rate, thermal insulation and radiation
GB/T26465-2021 Safety rules for the construction and installation of firefighters lifts
GB/T 28621-2023 Safety rules for the construction and installation of new lifts in existing building
GB/T 31095-2014 Lifts subject to seismic conditions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 7024， GB/T 7588.1-2020, GB/T 20900 and the following apply.
3.1
existing lift
lift that has been put into use
3.2
owner of the installation
natural person or legal person who has the right to dispose of lifts and is responsible for their operation
4 List of major hazards
4.1 Major hazards involved
This clause includes all major hazards, hazardous states, and events related to this document, which are identified as major risks for existing lifts through risk assessment and measures shall be taken to eliminate or reduce them.
The major hazards involved in this document are listed in Table 1.
Foreword i Introduction ii 1 Scope 2 Normative references 3 Terms and definitions 4 List of major hazards 5 Measures to improve the safety of existing lifts 6 Verification of safety measures and/or protection devices 7 Technical documents Annex A (Normative) Safety checklist for existing lifts Bibliography
Rules for the improvement of safety of existing lifts
1 Scope
1.1 This document specifies the methods for improving the safety of existing lifts, with the aim of applying current safety technology to make existing lifts achieve the same level of safety as newly installed lifts.
Note: Due to the design condition of the building, it may be difficult to fully achieve the current safety level.
1.2 This document is applicable to permanently installed traction, forced and hydraulically driven passenger or cargo lifts.
This document can be used to improve the safety of existing lifts for the following personnel:
a) passengers;
b) maintenance and inspection personnel;
c) persons who may be affected by lifts around hoistways, machine spaces and between pulleys;
d) any other authorized person.
1.3 This document is not applicable to the following situations, but can be used as a reference:
a) Lifts other than the driving modes specified in GB/T 7588.1-2020;
b) Lifting equipment, such as chain bucket lifts, mine lifts, stage lifts, machinery with automatic cages and hoppers, construction lifts, marine lifts, offshore mining or drilling platforms, construction and maintenance machinery, or lifts in wind power towers;
c) Lifts with inclination angle between guide rail and plumb line greater than 15°;
d) Lifts (lifting platforms) with rated speeds less than or equal to 0.15 m/s;
e) Safety of operation during transportation, installation, repair and disassembly of lifts.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 7024 Terminology of lifts, escalators, passenger conveyors
GB/T 7588.1-2020 Safety rules for the construction and installation of lifts - Part 1: Passenger and freight lifts
GB/T 20900 Lifts (elevators), escalators and moving walks - Risk assessment and reduction methodology
GB/T 23821-2022 Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs
GB/T 24475 Remote alarm on lifts (elevators)
GB/T 24477-2009 Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs
GB/T24479-2023 Behaviour of lifts in the event of fire
GB/T 24480-2009 Landing doors fire resistance test - Methods for leakage rate, thermal insulation and radiation
GB/T26465-2021 Safety rules for the construction and installation of firefighters lifts
GB/T 28621-2023 Safety rules for the construction and installation of new lifts in existing building
GB/T 31095-2014 Lifts subject to seismic conditions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 7024， GB/T 7588.1-2020, GB/T 20900 and the following apply.
3.1
existing lift
lift that has been put into use
3.2
owner of the installation
natural person or legal person who has the right to dispose of lifts and is responsible for their operation
4 List of major hazards
4.1 Major hazards involved
This clause includes all major hazards, hazardous states, and events related to this document, which are identified as major risks for existing lifts through risk assessment and measures shall be taken to eliminate or reduce them.
The major hazards involved in this document are listed in Table 1.
Contents of GB/T 24804-2023
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 List of major hazards
5 Measures to improve the safety of existing lifts
6 Verification of safety measures and/or protection devices
7 Technical documents
Annex A (Normative) Safety checklist for existing lifts
Bibliography
