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GB/T 20863.3-2025: Cranes - Classification - Part 3: Tower cranes
Status: Valid GB/T 20863.3: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20863.3-2025 | English | 284 |
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Cranes - Classification - Part 3: Tower cranes
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GB/T 20863.3-2025
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| GB/T 20863.3-2007 | English | 114 |
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Cranes -- Classification -- Part 3: Tower cranes
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GB/T 20863.3-2007
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PDF similar to GB/T 20863.3-2025
Basic data | Standard ID | GB/T 20863.3-2025 (GB/T20863.3-2025) | | Description (Translated English) | Cranes - Classification - Part 3: Tower cranes | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J80 | | Classification of International Standard | 53.020.20 | | Word Count Estimation | 14,189 | | Date of Issue | 2025-06-30 | | Date of Implementation | 2026-01-01 | | Older Standard (superseded by this standard) | GB/T 20863.3-2007 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 20863.3-2025: Cranes - Classification - Part 3: Tower cranes---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20863.3-2025
ICS 53.020.20
CCSJ80
National Standard of the People's Republic of China
Replaces GB/T 20863.3-2007
Crane classification Part 3.Tower cranes
(ISO 4301-3.2021, IDT)
Released on June 30, 2025
Implementation on January 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Symbols 1
5.Classification of tower cranes 2
5.1 General Principles 2
5.2 Classification of prefabricated tower cranes 3
5.3 Classification of self-erecting tower cranes 4
5.4 Classification of mobile self-erecting tower cranes 5
Appendix A (Informative) Information on the tower crane classification system 7
References 9
Figure 1 Permissible design space for assembled tower crane
Table 1 Main symbols 2
Table 2 Classification of assembled tower cranes
Table 3 Classification of self-erecting tower cranes 5
Table 4 Classification of mobile self-erecting tower cranes
Table A.1 Tower crane overall working level A7
Table A.2 Working class Ac 7 for components, wire ropes and mechanisms
Table A.3 Stress history level S 8
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
GB/T 20863 "Crane Classification" and GB/T 3811 "Crane Design Specifications", GB/T 22437 "Crane Load and Load
GB/T 30024 "Capacity Verification of Crane Metal Structures", GB/T 30561 "Crane Rigid Bridge and Door
Standards such as "Type Crane" together constitute the basic national standard system supporting crane design and calculation.
This document is Part 3 of GB/T 20863 Crane Classification. GB/T 20863 has been published in the following parts.
--- Part 1.General provisions;
--- Part 2.Mobile cranes;
--- Part 3.Tower cranes;
--- Part 4.Jib cranes;
--- Part 5.Bridge and gantry cranes.
This document replaces GB/T 20863.3-2007 "Classification of lifting machinery Part 3.Tower cranes" and GB/T 20863.3-
Compared with.2007, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
--- Changed the scope (see Chapter 1, Chapter 1 of the.2007 edition);
--- Added symbols (see Chapter 4);
--- Changed the classification requirements (see Chapter 5, Chapter 4, Chapter 5 and Chapter 6 of the.2007 edition).
This document is equivalent to ISO 4301-3.2021 "Crane classification — Part 3.Tower cranes".
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Lifting Machinery (SAC/TC227).
This document was drafted by. Beijing Construction Mechanization Research Institute Co., Ltd., Xuzhou Construction Machinery Engineering Co., Ltd., Hubei Jianghan Construction Engineering Co., Ltd.
Cheng Machinery Co., Ltd., Zhejiang Construction Engineering Machinery Group Co., Ltd., Jiangsu Special Equipment Safety Supervision and Inspection Institute, Shenyang Industrial
University, Wenzhou Special Equipment Testing Science Research Institute, China Construction Education Association, and China Construction Machinery Industry Association.
The main drafters of this document are. Liu Shuang, Mi Chenghong, Su Lipeng, Zhou Bing, Ou Bingxian, Yin Ming, Zhang Ke, Chagfield, Liu Chenghuan, Huang Chen, Li Yujie,
Wen Chaohui, Zhang Jinchao, Bai Xu, Li Qi, Sun Zikai, and Wang Aili.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2007 as GB/T 20863.3-2007;
---This is the first revision.
introduction
Cranes are used in the field of material handling and their function is to lift and move loads within the rated lifting capacity.
The design of the crane needs to consider the operating tasks according to the use conditions to achieve the safety and security that meet the buyer's requirements.
Full level and lifespan.
Classification is a frame of reference between the purchaser and the manufacturer regarding the intended work a particular crane can be used for.
A system provides a rational basis for the design of structures and machines.
GB/T 20863 "Crane Classification" is the basic and universal standard in the field of crane design and calculation in my country.
In establishing the classification principles and methods of crane complete machine and its parts and mechanisms, promoting trade cooperation and technical exchanges, and providing
Design, manufacturing, modification, maintenance, inspection and use, as well as the contract signing between the supply and demand parties, provide technical reference basis.
For the sake of consistency and coordination of standards, GB/T 20863 is planned to consist of five parts.
--- Part 1.General provisions;
--- Part 2.Mobile cranes;
--- Part 3.Tower cranes;
--- Part 4.Jib cranes;
--- Part 5.Bridge and gantry cranes.
Crane classification Part 3.Tower cranes
1 Scope
This document specifies the classification of tower cranes (hereinafter referred to as “tower cranes”) as defined in ISO 4306-3 for construction projects and
The standard operating conditions specify the specific requirements for steel structures, mechanisms, wire ropes and other components, which are mainly expressed by the following parameters.
---Number of working cycles;
---Load spectrum coefficient;
---Average displacement;
--- Additional values of coefficients used in structural or mechanical calculations.
Tower cranes used in construction projects are specially equipped with hooks as lifting devices (spreaders).
For tower cranes intended for other purposes and/or equipped with other lifting devices (spreaders), other parameters may appear depending on their specific use.
Numeric value.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 20863.1-2021 Crane classification Part 1.General principles (ISO 4301-1.2016, IDT)
GB/T 30024-2020 Capability verification for metal structures of cranes (ISO 20332.2016, IDT)
ISO 4306-3 Cranes - Vocabulary - Part 3.Tower cranes
cranes)
Note. GB/T 6974.3-2024 Crane terminology Part 3.Tower cranes (ISO 4306-3.2016, IDT)
3 Terms and Definitions
The terms and definitions defined in GB/T 20863.1-2021 and ISO 4306-3 apply to this document.
4 Symbols
The symbols defined in GB/T 20863.1-2021 and GB/T 30024-2020 apply to this document, see Table 1.
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