GB/T 22437.3-2025Cranes - Design principles for loads and load combinations - Part 3: Tower cranes (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 is Part 3 of GB/T 22437 "Design Principles for Crane Loads and Load Combinations". GB/T 22437 has been issued.

The following parts were laid out.

---Part 1: General Provisions;

---Part 2: Mobile Cranes;

---Part 3: Tower Cranes;

---Part 4: Boom Cranes;

---Part 5: Bridge and Gantry Cranes.

This document replaces GB/T 22437.3-2008 "Design Principles of Crane Loads and Load Combinations - Part 3: Tower Cranes".

Compared with GB/T 22437.3-2008, the main technical changes in the revised standard are as follows, except for structural adjustments and editorial modifications.

a) The scope description has been revised, adding "tower cranes used in construction projects are specially equipped with hooks as lifting devices (lifting tools)" and "for planned use..." for tower cranes used for other purposes and/or equipped with other lifting devices (slings), other parameter values may apply depending on their specific application.

Contents (see Chapter 1, Chapter 1 of the 2008 edition);

b) The term "lifting load" and its definition have been added (see Chapter 3);

c) The content of the symbols has been changed (see Chapter 4, Chapter 4 of the 2008 edition);

d) The general principles have been amended (see Chapter 5, Chapter 5 of the 2008 edition);

e) The basic requirements for loads have been increased (see 6.1);

f) The loads and applicable coefficients have been changed (see 6.2, Table 1; Chapter 6, Table 1, 2008 edition);

g) Added design requirements for wind loads in non-operating states (see 6.3);

h) Added design requirements for loads caused by installation, disassembly, and transportation (see 6.4);

i) Increased design requirements for loads on the channel device (see 6.5);

j) Content related to inertial forces and wind loads under operating conditions has been removed (see 7.1 and 7.2 in the 2008 edition);

k) Added basic requirements for load combinations (see 7.1), favorable and unfavorable masses (see 7.2), and partial safety factors for tower crane mass.

(See 7.3), high-risk applications (see 7.4), load combinations for strength verification (see 7.5), load combinations for fatigue verification (see 7.6).

7.6) Load combinations for stability verification (see 7.7), wind slip resistance (for traveling tower cranes) (see 7.8), and other related design requirements;

l) The contents of the loads, load combinations, and partial safety factors used for strength verification have been changed (see Table 4, Table 2 in the 2008 edition);

m) The basic requirements for load design of tower crane support structures (see 8.1) and load combinations (see 8.2) have been added;

n) The design requirements for the load and load combination of the climbing system have been increased (see Appendix B).

This document is modified to adopt ISO 8686-3:2018 "Design principles for crane loads and load combinations – Part 3: Tower cranes".

Heavy machinery.

This document has undergone the following structural adjustments compared to ISO 8686-3:2018.

---Sections 3.1 "Balancing Moment" and 3.2 "Offset Moment" in ISO 8686-3:2018 have been deleted, and the term "lifting load" and its...

definition;

---The description of the direction of load application in section 6.5 "Loads on channel devices" of ISO 8686-3:2018 has been moved to Table 2 "Channel Devices".

In the phrase "load on the device";

---Added Appendix A, "Technical Differences Between This Document and ISO 8686-3:2018 and Their Reasons," which will include Appendix A of ISO 8686-3:2018.

"Load and Load Combination of Climbing System" is revised to Appendix B;

---Footnotes b-e and the description of load combinations in Table A.1 of ISO 8686-3:2018 have been moved to an appendix outside of Table B.1.

In the corresponding clauses of B.

This document differs significantly from ISO 8686-3:2018.The relevant clauses are indicated in vertical margins.

Single lines (|) are indicated. Appendix A provides a summary of these technical differences and their reasons.

The following editorial changes have been made to this document.

---Change "lifting device" to "lifting device (sling)" (see Chapter 1);

---Change the chapter title to "Symbol" (see Chapter 4);

---The phrase "These additional empirical load cases mainly involve extensions to rigid body stability checks" has been removed (see ISO 8686-3:2018).

(The third paragraph of 6.3.1)

---Change "Power amplification of row 1 in Table 1" to "Coefficient phi1 of row 1 in Table 1" (see 6.4);

---Change "The following load combinations specified in Table 5" to "The following load combinations specified in Table 4" (see 8.2).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no 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 on Standardization of Lifting Machinery (SAC/TC227).

Introduction

GB/T 22437 specifies the general methods for calculating various loads and selecting load combinations for various types of cranes as defined in GB/T 6947.1.

The general principle is to verify the load-bearing capacity of various crane metal structures and mechanical parts, and it is proposed to consist of 5 parts.

---Part 1: General Principles. The purpose is to specify the general methods for calculating various loads and the general principles for selecting load combinations.

---Part 2: Mobile Cranes. The purpose is to specify the methods for calculating various loads on mobile cranes and to select load groups.

The principle of harmony.

---Part 3: Tower Cranes. The purpose is to specify the methods for calculating various loads on tower cranes and selecting load combinations.

in principle.

---Part 4: Boom Cranes. The purpose is to specify the methods for calculating various loads on boom cranes and selecting load combinations.

in principle.

---Part 5: Bridge and Gantry Cranes. The purpose is to specify the methods for calculating various loads on bridge and gantry cranes and for selecting appropriate loads.

The principle of selecting load combinations.

Crane load and load combination design principles Part 3: Tower Cranes

1 Scope

This document specifies the tower cranes (hereinafter referred to as "tower cranes") as defined in GB/T 22437.1 and GB/T 6974.3 for use in building construction.

The paper describes the application of the machine in structural calculations and provides specific requirements and values for the coefficients used in structural calculations.

This document applies to the design of tower cranes as defined in GB/T 6974.3 for use in building construction.

Tower cranes used in construction projects are specially equipped with hooks as lifting devices (lifting tools).

For tower cranes intended for other purposes and/or equipped with other lifting devices (slings), additional parameters may apply depending on their specific application.

Numerical value.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 5905.1 Crane Inspection and Testing Standards Part 1: General Rules GB/T 6974.3 Crane Terminology Part 3: Tower Cranes (GB/T 6974.3-2024, ISO 4306-3:2016) IDT) GB/T 10183.1-2018 Crane wheels and trolley/roller rails – Tolerances – Part 1: General (ISO 12488-1.

2012, IDT)

GB/T 13752-2017 Design Specification for Tower Cranes GB/T 22437.1-2018 Design principles for crane loads and load combinations – Part 1: General principles (ISO 8686-1.

2012, IDT)

GB/T 30024-2020 Capability verification of metal structures for cranes (ISO 20332:2016, IDT) ISO 4302 Cranes - Windload Assessment

3 Terms and Definitions

The terms and definitions defined in GB/T 6974.3 and GB/T 22437.1, as well as the following terms and definitions, apply to this document.

hoistload

The effective load is the sum of the weights suspended by the tower crane, including fixed and detachable lifting devices, as well as flexible lifting components (such as hoisting wire ropes).

The sum of the weights of the suspended parts.

Note 1.The lifting load is equivalent to the total lifting capacity defined in 8.1.7 of GB/T 6974.1-2008, not the rated lifting capacity defined in 8.1.8 of GB/T 6974.1-2008.

Set the lifting weight.

Note 2.The effective load is the effective lifting capacity defined in 8.1.1 of GB/T 6974.1-2008.

Note 3.The definitions of detachable and fixed lifting devices are given in GB/T 6974.1-2008, sections 8.1.2 and 8.1.4.This document stipulates that tower cranes used in construction projects are specially equipped with lifting hooks.

As a lifting tool, this hook belongs to the category of fixed lifting tools.