GB 45069-2024 Cliff swing safety technical requirements
1 Scope
This document specifies the safety requirements for the design, manufacturing, installation and usage management of cliff swings, and describes the corresponding test methods.
This document is applicable to the design, manufacturing, installation, modification, repair, test and usage management of cliff swings.
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 of the referenced document (including any amendments) applies.
GB/T 5226.1 Electrical safety of machinery - Electrical equipment of machines - Part 1: General requirements
GB 5725 Safety nets
GB 8408 Large-scale amusement device safety code
GB/T 8918 Steel wire ropes for important purposes
GB/T 8923 (all parts) Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness
GB/T 9286-2021 Paints and varnishes - Cross-cut test
GB/T 13912 Metallic coatings - Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods
GB/T 20306 Amusement devices terminology
GB/T 34371 Risk assessment for amusement ride - General principles
GB/T 39043 Risk assessment for amusement ride - Hazard
GB 50009 Load code for the design of building structures
GB/T 50011 Code for seismic design of buildings
GB 50017 Standard for design of steel structures
GB 50135 Code for design of high-rising structures
GB 50231 General code for construction and acceptance of mechanical equipment installation engineering
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 20306 and the following apply.
3.1
cliff swing
large amusement facility that lifts passengers (passenger cabins) to a certain height with steel wire ropes or other ropes through a lifting device, and swings back and forth around the suspension point by relying on its own potential energy and whose suspension is of rigid structure
Note 1: The cliff swing and combined structure (such as shared column) or shared control system, if any, are regarded as one (a set of) device.
Note 2: The main structural types of cliff swings refer to the types of beams and suspension structures.
Note 3: See Figure 1 for the schematic diagram of typical structure of a cliff swing.
Note 4: The lifting device is not limited to electric lifting.
3.2
lifting device
device for lifting the suspension structure and passenger cabin to a certain height
3.3
separating device
means for separating the lifting device from the passenger cabin
4 Design
4.1 Basic requirements
4.1.1 The cliff swing shall meet the requirements of GB 8408 in addition to the requirements of this document.
4.1.2 The number of passengers in a passenger cabin hanging by a single beam of a cliff swing shall not be more than 2 people.
Note: The number of passengers carried by a cliff swing refers to the number of passengers carried by a single suspension structure.
4.1.3 The maximum unilateral swing angle of a cliff swing shall not be greater than 75 °.
4.1.4 Risk assessment of cliff swings shall be carried out in accordance with GB/T 34371 and GB/T 39043 during the design stage.
4.1.5 The operating unit or the design entrusting party shall provide the geological, seismic, meteorological and power supply data of the cliff swing installation site in writing.
4.1.6 The cliff swing shall have a fixed foundation, and the foundation or building (structure) part shall be entrusted to a unit with corresponding qualifications for design and construction, and comply with the relevant civil engineering or building (structure) design specifications.
4.2 Load and calculation
4.2.1 Load and condition analysis
4.2.1.1 The live load of a cliff swing shall not be lower than the maximum load of passengers allowed to accommodate.
4.2.1.2 When calculating the ultimate wind load, at least the wind load with a recurrence interval of 50 years at the site of use shall be selected. For coastal cities (see HY/T 094) and areas with altitude of above 1,000m, the wind load with a recurrence interval of 100 years shall be selected. The wind load shall be determined in accordance with the requirements of GB 50009.
4.2.1.3 The seismic loads during design shall be taken in accordance with the requirements of GB/T 50011.
4.2.1.4 The icing load shall be calculated during design, and the load shall be taken in accordance with the requirements of GB 50135.
4.2.1.5 The impact coefficient of lifting tower (frame) and separating device shall not be less than 1.5 under separation conditions.
4.2.1.6 The operating conditions of cliff swing include normal operating conditions, abnormal operating conditions and limit state conditions. Normal operating conditions include lifting, separating, swinging, maximum overturning moment. Abnormal operating conditions include at least emergency stop, emergency rescue and maintenance. Extreme state conditions include at least extreme wind speed and earthquake.
4.2.1.7 According to different operating conditions analysis, the permanent load borne by the cliff swing structure shall be combined with other loads. The combination example is shown as in Annex A.
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Design
5 Manufacturing and installation
6 Test methods
7 Usage management
Annex A (Informative) Examples of typical operating conditions and load combinations of cliff swings
Bibliography
