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GBT31255-2014

Chinese Standard: 'GBT31255-2014'
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GB/T 31255-2014
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 13.110
J 09
Safety of machinery - Safety specification for the design of
industrial type stairs, working platforms and walkways
机械安全 工业楼梯, 工作平台和通道的安全设计规范
ISSUED ON. DECEMBER 05, 2014
IMPLEMENTED ON. JULY 01, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of contents
Foreword ... 3 
Introduction ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 General ... 10 
5 Material ... 10 
6 Stairs ... 11 
7 Working platforms and walkways ... 13 
8 Edge protection ... 15 
9 Protective structure ... 15 
References ... 18 
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard was proposed by the National Machinery Safety Standardization
Technical Committee (SAC/TC 208).
The drafting organizations of this standard. Tianjin Jinmao Group Co., Ltd.,
China Productivity Center for Machinery, Changchun Institute of Mechanical
Science and Technology Co., Ltd., Nanjing Forestry University Institute of
Optical and Electrical Engineering.
The main drafters of this standard. Li Qin, Zhang Xiaofei, Wang Shengjiang, Li
Jie, Ning Yan, Wang Xuezhi, Ju Ronghua, Cheng Hongbing, Li Chunping, Fu
Huiqing, Liu Zhiyong.
Introduction
The mechanical safety standards are structured as follows.
- Category A standards (fundamental safety standards), providing the basic
concepts, design principles and general characteristics applicable to all
machinery;
- Category B standards (general safety standards), involving a safety
feature in machinery or a category of safety devices with wide application
range.
• Category B1, safety features (such as safety distance, surface
temperature, noise) standard;
• Category B2, safety devices (such as two-hand control device, interlock
device, pressure-sensitive devices, protective devices) standard.
- Category C standards (machinery safety standards) that specify a detailed
safety requirement for a particular machine or group of machines.
In accordance with GB/T 15706, this standard belongs to category B standard.
Category C standards may supplement OR modify the terms of this standard.
For machines designed and constructed in accordance with the category C
standards, if the terms in the category C standards are inconsistent with the
category A or B standards, it is preferred to use the category C standards.
Safety of machinery - Safety specification for the design of
industrial type stairs, working platforms and walkways
1 Scope
This standard specifies the safety design specifications for industrial stairs,
working platforms and walkways.
This standard applies to industrial stairs, working platforms and walkways used
to access the fixed facilities of machinery.
This standard also applies to industrial stairs, working platforms and walkways
that are not fixed to the machine BUT may need to be removed or moved to
aside of the machine (e.g., tools for replacing large presses) during certain
operations on the machine.
Other industrial stairs, working platforms and walkways may also make
reference to AND use this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this Standard.
GB/T 15706-2012 Safety of machinery - General principles for design - Risk
assessment and risk reduction
GB 17888.1-2008 Safety of machinery - Permanent means of access to
machines and industrial plants - Part 1. Choice of a fixed means of access
between two levels
GB 17888.2-2008 Safety of machinery - Permanent means of access to
machines and industrial plants - Part 2. Working platforms
GB 17888.3-2008 Safety of machinery - Permanent means of access to
machines and industrial plants - Part 3. Stairs, stepstairs and guard-rails
All step spacing in the stair section shall be consistent AND the tolerance shall
comply with the requirements given in 6.6. The relationship between the stair
step spacing h and the ......
Related standard:   GB/T 31254-2014  GB/T 18569.1-2020
   
 
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