GB/T 26471-2023Tower crane—Rules of installation, disassembly and climbing (English PDF)

Foreword

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.

This document replaces GB/T 26471-2011 "Rules for Installation and Disassembly of Tower Cranes". Compared with GB/T 26471-2011, except Apart from structural adjustments and editorial changes, the main technical changes are as follows:

---Changed and added some terms and definitions (see Chapter 3, Chapter 3 of the 2011 edition);

--- Deleted the term definition of "transition section" (see 3.2 of the 2011 edition);

---Change and increase the requirements for installation and disassembly units and personnel (see Chapter 4, Chapter 4 of the 2011 edition);

--- Increased requirements for special programs (see 5.2);

---Changed and added the requirements for installation and dismantling safety distance and group tower operation installation safety distance (see 5.4, 5.5, 5.4~5.6 of the 2011 edition);

--- Added requirements for installation site selection (see 5.6);

--- Increased post-installation self-test and debugging requirements (see 5.7.1);

--- Added the requirements for inspection and acceptance after installation self-inspection (see 5.7.2);

--- Added requirements for windshields, warning signs and components (see 5.8);

--- Added the requirements for technical disclosure before installation and disassembly (see 6.1.4);

--- Increased the requirements for staffing on-site installation and dismantling (see 6.2);

--- Changed the inspection requirements before installation (see 6.4.1, 6.3.1 of the 2011 edition);

---Changed the requirements on the foundation and attached buildings (structures) (see 6.5, 6.4 of the 2011 edition);

--- Increased the verticality requirements of the tower body in the no-load state (see 7.4);

--- Changed the requirements for high-strength bolts (see 7.6, 7.5 of the 2011 edition);

--- Added the requirements for the installation of the jib tie rod (see 7.12);

--- Added the requirements for the total installation height of the internal climbing (external hanging) tower crane and the installation position of the special frame (see 7.13);

--- Added the requirements for commissioning of the working mechanism and wiring of the electrical system after installation (see 7.14, 7.15);

--- Added requirements for disassembly process (see 7.16);

--- Increased the basic erection height stage inspection and testing requirements (see 7.18);

--- Increased the balance requirements for the climbing part of the tower crane (see 8.2.4);

--- Increased the requirements on the reduction of knots (see 8.2.7);

--- Changed the requirements on the hydraulic system (see 8.3, 8.3 of the 2011 edition);

--- Added design and manufacture requirements for non-standard attachment devices (see 9.1.3);

--- Increase the design and manufacture requirements for non-standard components of internal climbing (external hanging) tower cranes (see 10.1.1);

---Changed the requirements for dismantling the internal climbing (external hanging) tower crane (see 10.3, 10.3 of the 2011 edition).

1 Scope

This document specifies the installation, dismantling and climbing (hereinafter referred to as "installation and disassembly") operations of tower cranes (hereinafter referred to as "tower cranes").

Units and personnel, basic regulations for installation and dismantling, preparations before installation and dismantling, installation and dismantling of basic erection heights, climbing operations of external climbing tower cranes, installation and removal of attachment devices Requirements for installation and disassembly, installation and disassembly of internal climbing (external hanging) tower cranes, commissioning of safety protection devices, inspection and acceptance after installation.

This document is applicable to the installation and dismantling of assembled upper-slewing tower cranes, and the installation and dismantling of other types of tower cranes shall be carried out by reference.

Note: This document gives suggestions and guidance on the management of tower crane installation and dismantling operations, including the responsibilities of the user unit and supplier unit involved in these operations, and relevant personnel. responsibilities and conditions of employment.

This document does not apply to the installation and dismantling of self-erecting tower cranes and mobile self-erecting tower cranes.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 5031-2019 Tower Cranes

GB 5144-2006 Safety regulations for tower cranes

GB/T 6974.3 Crane Terminology Part 3: Tower Cranes

GB/T 23723.3-2010 Safe use of cranes Part 3: Tower cranes

GB/T 23724.3-2010 Crane Inspection Part 3: Tower Cranes

GB/T 31052.3-2016 Inspection and Maintenance Procedures for Lifting Machinery Part 3: Tower Cranes

GB/T 33080-2016 Safety Assessment Procedures for Tower Cranes

GB 50169 Specifications for construction and acceptance of grounding devices for electrical installation engineering

JB/T 13915 Pre-tightening and anti-loosening of high-strength bolts for tower cranes

3 Terms and Definitions

The following terms and definitions defined in GB/T 6974.3 and GB/T 5031-2019 apply to this document.