GB/T 31257-2014 in English

《GB/T 31257-2014蹦极通用技术条件》由TC250（全国索道与游乐设施标准化技术委员会）归口，主管部门为国家标准化管理委员会。
本标准规定了蹦极的设计、制造与安装、安全要求和试验方法。
本标准适用于高空固定平台蹦极、弹射蹦极和小型蹦极。

1 Scope

This standard specifies design, manufacture and installation, safety requirements and test methods of bungy.

This standard is applicable to high-altitude bungy from fixed platform, ejection bungy and small bungy.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated reference, the latest edition (including all the amendments) applies.

GB 8408 Amusement Device Safety Code
GB 8918 Steel Wire Ropes for Important Purposes
GB/T 18204.15 Methods for Determination of Wind Speed in Public Places
GB/T 20306 Amusement Equipments Terminology
GB 50017 Code for Design of Steel Structures

3 Terms and Definitions

For the purpose of this document, terms and definitions given in GB/T 20306 and the following apply:

3.1

high-altitude bungy from fixed platform

amusement equipment that allows visitors to jump from high-altitude fixed towers or platforms with elastic ropes or other elastic members so as to jump and somersault in the air with the help of the flexibility of the rope or member

3.2

spring zone

the maximum motion space for the springer or his/her ride

3.3

safety space

spatial range with specified size outside the spring zone

3.4

spring space

the sum of the spring zone and the safety space

3.5

dynamic safety factor

safety factor calculated by taking the inertial acceleration of the object and other dynamic load (i.e., the load that changes with time) into consideration during the force analysis

3.6

static safety factor

Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Design
5 Manufacture and Installation
6 Safety Requirements
7 Test Methods
Annex A (Informative) Spring Zone, Safety Space and Spring Space
Bibliography