GB/T 31258-2024 English PDF (GBT31258-2024)

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GB/T 31258-2024: Specification of zip line
GB/T 31258-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.200.40
CCS Y 57
Replacing GB/T 31258-2014
Specification of Zip Line
ISSUED ON: MARCH 15, 2024
IMPLEMENTED ON: MARCH 1, 2025
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 7
4 Basic Requirements ... 10
5 Inspection, Testing and Test ... 20
6 Accompanying Documents, Marking, Packaging, Transportation and Storage ... 24
Appendix A (normative) Calculation of Ice-wrapped Load of Steel Wire Ropes ... 26
Appendix B (informative) Tension Calculation of Load Bearing Ropes Fixed at Both
Ends ... 28
Specification of Zip Line
1 Scope
This document specifies the technical requirements, inspection, testing and test, accompanying
documents, marking, packaging, transportation and storage of large-scale amusement facility
zip line.
This document is applicable to the design, manufacture, installation, modification, repair, test,
inspection and testing of zip lines that carry no more than 4 people on single manned equipment.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 191 Packaging - Pictorial Markings for Handling of Goods
GB 5725 Safety Nets
GB 8408-2018 Large-scale Amusement Device Safety Code
GB/T 8918 Steel Wire Ropes for Important Purposes
GB/T 9075 Code for Examination and Discard of Ropes for Ropeway
GB/T 9969 General Principles for Preparation of Instructions for Use of Industrial Products
GB/T 13384 General Specifications for Packing of Mechanical and Electrical Product
GB/T 20050-2020 Inspection and Testing Specifications of Large-scale Amusement Device -
General Principles
GB/T 20306-2017 Amusement Devices Terminology
GB/T 26722 Steel Wire Ropes for Ropeway
GB/T 34370.9 Nondestructive Testing of Amusement Equipment - Part 9: Magnetic Flux
Leakage Testing
GB 50007 Code for Design of Building Foundation
GB 50009 Load Code for the Design of Building Structures
The straight-line distance between the support points of the load bearing ropes at the upper and
lower stations.
4 Basic Requirements
4.1 Basic Design Requirements
4.1.1 The zip line shall satisfy the provisions of GB 8408-2018. The design shall be correctly
calculated, have a reasonable structure and be able to ensure the safety of passengers. The main
technical parameters are length, running speed, height difference of the load bearing rope,
number of passengers carried by each track, and number of zip line tracks, etc.
4.1.2 The design documents of the zip line shall at least include the design calculation, design
instructions, usage and maintenance instructions, risk assessment report, design test verification
outline and a complete set of design drawings that comply with relevant national standards.
4.1.3 The risk assessment at least includes stress-bearing structures and stress-bearing parts,
equipment operating environment, obstacles around the equipment, human factors, accidental
factors and emergency rescue, etc. The assessment content at least includes the stagnation of
the passenger during taxiing, the failure of the traction device, and the failure of the passenger
riding device and the restraint device, etc.
4.1.4 In addition to satisfying the relevant requirements of GB 8408-2018 and GB/T 9969, the
usage and maintenance instructions also include at least the following requirements.
a) Two or more pulleys are not allowed to slide at the same time on the same load bearing
rope.
b) When out of service, the pulleys shall be removed or locked.
c) When encountering weather such as: rain, snow, frost and fog, etc., the load bearing
rope is wrapped in ice, or the wind speed is greater than 8 m/s, the zip line shall stop
running.
d) There shall be operable emergency rescue measures and rescue equipment.
e) Regular safety inspections (daily inspection, weekly inspection, monthly inspection
and annual inspection).
f) The requirements for the operating personnel allocation are as follows:
1) The number of operating personnel on duty at the departure station shall not be
less than the number of zip line tracks in operation. The operating personnel shall
guide and supervise tourists to put on or sit on the manned equipment in the
prescribed posture, and check and confirm the passenger restraint devices;
2) The arrival station shall be equipped with operating personnel to assist tourists
in leaving the manned equipment.
NOTE: the operating personnel mentioned in this document refers to those who have obtained the
“Special Equipment Safety Management and Operator Certificate”.
g) The operating personnel shall be equipped with safety protection devices to prevent
them from accidentally falling.
h) Specify the design service life of steel wire ropes (load bearing ropes and recovery
ropes), pulleys, manned equipment, and fixed wire rope metal structures, etc.
4.1.5 Zip line routes and sites shall not be built in miliary restricted areas, power line protected
areas, mountain vents, or areas where avalanches, landslides, collapses, caves, storms, tsunamis,
floods and fires, etc. may threaten the safety of zipline operation.
4.1.6 The load selection for the design calculation of the zip line shall comply with the
provisions of 6.1.2 in GB 8408-2018. Depending on the riding mode, the windward area of a
single human body in the prone zip line shall be 0.3 m2 ~ 0.5 m2; the windward area of a single
human body in the seated zip line shall be 0.5 m2 ~ 0.8 m2. If the manned equipment is a cockpit
type, the maximum windward area of the cockpit shall be adopted. The impact coefficient is
not lower than 1.1 (taking into account the pulley, manned equipment and live load). If it
belongs to the ice-wrapped area, the ice-wrapped operating conditions shall be considered in
accordance with the provisions of GB 50135. The calculation of the ice-wrapped load of the
steel wire rope shall comply with the provisions of Appendix A. In the ice-wrapped condition,
the steel wire rope shall not be broken, and the metal structure of the fixed steel wire rope shall
not become unstable.
4.1.7 When designing the zip line, in accordance with the fixing method listed in Table 8 of GB
8408-2018, the end fixing efficiency shall be considered, and the safety factor of each
component shall satisfy the following requirements:
a) The safety factor of all components of the load bearing rope, traction rope and pulley
shall not be less than 5;
b) The safety factor of the metal structural components of the fixed steel wire rope shall
not be less than 3.5;
c) The safety factor of the anchor point weld of the steel wire rope of the load bearing
rope shall not be less than 5;
d) The safety factor against overturning shall be selected in accordance with the
provisions of Table 3 in GB 8408-2018.
4.1.8 The tower shall be designed in accordance with the provisions of GB 50017.
4.1.9 The zip line shall have rescue plane and rescue equipment for any foreseeable situation,