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GB/T 17888.4-2020 (GB/T17888.4-2020)

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GB/T 17888.4-2020: PDF in English (GBT 17888.4-2020)

GB/T 17888.4-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.110
J 09
GB/T 17888.4-2020 / ISO 14122-4:2016
Replacing GB/T 17888.4-2008
Safety of Machinery – Permanent Means of Access to
Machinery – Part 4: Fixed Ladders
(ISO 14122-4:2016, IDT)
ISSUED ON: NOVEMBER 19, 2020
IMPLEMENTED ON: JUNE 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 7
2 Normative References ... 7
3 Terms and Definitions ... 8
4 Selection and Design of Ladder Systems ... 13
4.1 General ... 13
4.2 Choice of a type fall protection device ... 14
4.3 Height of ladder flights and fall protection device ... 16
4.4 Platforms and landings ... 16
5 Specific Requirements of Ladder Systems ... 18
5.1 General requirements ... 18
5.2 Ladder with two stiles ... 21
5.3 Ladder with one stile ... 24
5.4 Departure and arrival areas ... 26
5.5 Fall protection device ... 29
5.6 Platforms and landings ... 34
5.7 Requirements on moveable parts of fixed ladders ... 38
6 Verification of Safety Requirements ... 38
6.1 General ... 38
6.2 Tests of fixed ladders with two stiles ... 39
6.3 Test of ladders with one stile ... 41
6.4 Test of extensions of guard-rails ... 43
7 Information for Use for Fixed Ladders ... 44
7.1 Instruction handbook ... 44
7.2 Marking of ladder systems with fall arrester ... 45
Annex A (Normative) Requirements for the Design of Anti-Climb Devices ... 46
Annex B (Informative) Summary of Main Dimensions of a Fixed Ladder Equipped
with a Safety Cage ... 50
Annex C (Informative) Significant Technical Changes between this Part and GB/T
17888.4-2008 ... 52
Bibliography ... 55
Foreword
GB/T 17888 Safety of Machinery – Permanent Means of Access to Machinery constitutes the
following four parts:
--- Part 1: Choice of a Fixed Means and General Requirements of Access;
--- Part 2: Working Platforms and Walkways;
--- Part 3: Stairs, Stepladders and Guard-Rails;
--- Part 4: Fixed Ladders.
This Part is Part 4 of GB/T 17888.
This Part was drafted as per the rules specified in GB/T 1.1-2009.
This Part replaced GB/T 17888.4-2008 Safety of Machinery - Permanent Means of Access to
Machinery - Part 4: Fixed Ladders. Compared with GB/T 17888.4-2008, the major technical
changes of this Part can refer to Annex C.
This Part used the translation method to equivalently adopt ISO 14122-4:2016 Safety of
Machinery - Permanent Means of Access to Machinery - Part 4: Fixed Ladders.
The Chinese documents that have consistent correspondence with the international documents
normatively cited in this Part are as follows:
--- GB/T 15706-2012 Safety of Machinery - General Principles for Design - Risk
Assessment and Risk Reduction (ISO 12100:2010, IDT)
--- GB/T 17888.1-2020 Safety of Machinery - Permanent Means of Access to Machinery -
Part 1: Choice of Fixed Means and General Requirements of Access (ISO 14122-1:2016,
IDT)
--- GB/T 17888.2-2020 Safety of Machinery - Permanent Means of Access to Machinery –
Part 2: Working Platforms and Walkways (ISO 14122-2:2016, IDT)
--- GB/T 17888.3-2020 Safety of Machinery - Permanent Means of Access to Machinery –
Part 3: Stairs, Stepladders and Guard-Rails (ISO 14122-3:2016, IDT)
This Part was proposed by and under the jurisdiction of National Technical Committee on
Mechanical Safety of Standardization Administration of China (SAC/TC 208).
Drafting organizations of this Part: Wright Housewares Co., Ltd. Foshan; Shanghai Ruiju Metal
Products Co., Ltd.; Ningguo Dongfang Grinding Materials Co., Ltd.; Zhejiang Aopeng Industry
and Trading Co., Ltd.; Zhengzhou Guizhu Industry and Trading Co., Ltd.; Yancheng STG
Safety Equipment Co., Ltd.; China Productivity Center for Machinery; Tianjin Jinmao Group
Safety of Machinery – Permanent Means of Access to
Machinery – Part 4: Fixed Ladders
1 Scope
This Part of GB/T 17888 gives requirements for fixed ladders which are a part of a stationary
machine, and to the non-powered adjustable parts (e.g., foldable, slidable) and movable parts
of fixed ladder systems.
NOTE 1: “Fixed” means of access are those mounted in such a manner (for example, by screws, nuts,
welding) that they can only be removed by the use of tools.
This Part specifies minimum requirements that also apply when the same means of access is
required as the part of the building or civil construction (e.g. fixed ladders) where the machine
is installed, on condition that the main function of that part of the construction is to provide a
means of access to the machine.
NOTE 2: Where no local regulation or standards exists, this Part may be used also for means of access
which are outside the scope of the standard.
It is intended that this Part be used with GB/T 17888.1 to give the requirements for fixed ladder
systems.
GB/T 17888 series as a whole is applicable to both stationary and mobile machinery where
fixed means of access are necessary. It is not applicable to powered means of access such as
lifts, escalators, or other devices specially designed to lift persons between two levels.
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) is applicable to this
document.
ISO 12100 Safety of Machinery – General Principles for Design – Risk Assessment and
Risk Reduction
ISO 14122-1:2016 Safety of Machinery – Permanent Means of Access to Machinery – Part
1: Choice of Fixed Means and General Requirements of Access
ISO 14122-2:2016 Safety of Machinery – Permanent Means of Access to Machinery – Part
2: Working Platforms and Walkways
ISO 14122-3:2016 Safety of Machinery – Permanent Means of Access to Machinery – Part
3: Stairs, Stepladders and Guard-Rails
EN 353-1:2014 Personal Fall Protective Equipment – Guided Type Fall Arresters
Including an Anchor Line – Part 1: Guided Type Fall Arresters Including a Rigid Anchor
Line
EN 795 Personal Fall Protection Equipment – Anchor Devices
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in ISO 12100, ISO 14122‑1,
and the following apply.
3.1 Fixed ladder system/ladder system/fixed ladder
Installation of at least one ladder flight (3.4), fall protection (3.7), where appropriate, as well as
landing(s) and/or platform(s).
NOTE: In the following text, the abbreviation “ladder” and “ladder flight” is used for fixed ladders and
fixed ladder flights, respectively.
3.2 Ladder with two stiles
Ladder, according to ISO 14122-1:2016, 3.1, which is stationary and where the rungs are
arranged between and attached to the stiles
NOTE: The stiles carry the load (see Figure 1).
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.